Shell-shaped dental instrument and shell-shaped dental instrument assembly

Abstract

A shell-shaped dental instrument (100), comprising an appliance (10) having a cavity for accommodating teeth and a support unit (20). An occlusal surface (A1) of the appliance (10) comprises a support surface (A11) corresponding to an occlusal surface of a certain posterior tooth. The support surface (A11) comprises a first support surface (A111) located in the middle and a second support surface (A112) arranged around the first support surface (A111). A separation line (L) between the first support surface (A111) and the second support surface (A112) passes through a plurality of cusps (R). The plurality of cusps (R) correspond to a plurality of dental cusps of posterior teeth, respectively. The support unit (20) is located on the support surface (A11). A first peripheral line (L1) is formed in a junction region between the support unit (20) and the support surface (A11). At least part of the first peripheral line (L1) is located in the first support surface (A111).

Description

Shell-shaped dental instrument and shell-shaped dental instrument assembly

[0001] This application claims priority to Chinese patent applications filed on December 11, 2023, with application number 202323384769.1, titled “Shell-shaped dental instrument and shell-shaped dental instrument assembly”, filed on December 11, 2023, with application number 202323381632.0, titled “Dental orthodontic appliance and dental orthodontic appliance assembly”, filed on December 11, 2023, with application number 202311694488.8, titled “Dental orthodontic appliance and dental orthodontic appliance assembly”, filed on May 8, 2024, with application number 202410566324.5, titled “Design method of digital jaw pad, molding method of appliance, appliance, appliance assembly, device, equipment and medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of dental orthodontics, and in particular to a shell-shaped dental instrument and a shell-shaped dental instrument assembly. Background Art

[0003] Malocclusion refers to the deformity of teeth, jaws, and craniofacial structure caused by congenital or acquired factors during a child's growth and development. It is mainly manifested as uneven teeth and misalignment of the upper and lower jaws (such as buck teeth and sunken mouth).

[0004] Currently, malocclusion is usually treated by using a shell-shaped dental appliance including a jaw pad. However, the jaw pad in the prior art suffers from unstable occlusal pressure. Summary of the Invention

[0005] The object of the present application is to provide a shell-shaped dental instrument, on which a supporting unit can maintain a stable occlusal pressure.

[0006] An embodiment of the present application provides a shell-shaped dental device, including an orthodontic appliance having a cavity for accommodating teeth and a support unit, the occlusal surface of the orthodontic appliance including a support surface corresponding to the occlusal surface of a certain posterior tooth, the support surface including a first support surface located in the middle and a second support surface arranged around the first support surface, the dividing line between the first support surface and the second support surface passes through multiple tips, and the multiple tips respectively correspond to multiple tooth tips of the posterior teeth, the support unit is located on the support surface, and the junction area between the support unit and the support surface forms a first outer peripheral line, and at least part of the first outer peripheral line is located within the first support surface.

[0007] Optionally, the first outer peripheral line is entirely located within the first supporting surface.

[0008] Optionally, there is a gap between the first outer peripheral line and the separation line on the buccal or lingual side close to the orthodontic appliance.

[0009] Optionally, the first outer peripheral line is an annular closed structure, and the first outer peripheral line is spaced apart from the separation line.

[0010] Optionally, the first outer peripheral line includes a first portion located on the first support surface and a second portion located on the second support surface, the second portion is connected to the first portion, and the second portion is located on the buccal side or the lingual side of the first support surface.

[0011] Optionally, when the second part is located on the buccal side of the first support surface, the support unit is inclined toward the buccal side of the orthodontic appliance; when the second part is located on the lingual side of the first support surface, the support unit is inclined toward the lingual side of the orthodontic appliance.

[0012] Optionally, the second part is located on the buccal side of the first support surface, and there is a gap between the area of ​​the first part close to the lingual surface of the orthodontic device and the dividing line; or, the second part is located on the lingual side of the first support surface, and there is a gap between the area of ​​the first part close to the buccal surface of the orthodontic device and the dividing line.

[0013] Optionally, the second portion is located on one of the buccal side and the lingual side of the first support surface.

[0014] Optionally, the first outer peripheral line is an annular closed structure, and there is a gap or overlap between the first portion and the proximal end and the distal end of the separation line.

[0015] Optionally, the first outer peripheral line is an annular closed structure, and the second portion is also located on the proximal side and / or distal side of the first support surface.

[0016] Optionally, the support unit is vertically arranged relative to the jaw plane, or the support unit is inclined relative to the jaw plane.

[0017] Optionally, the first outer peripheral line includes multiple curves, and there is a smooth transition between adjacent curves.

[0018] Optionally, the first outer peripheral line includes at least one recessed portion and at least one protruding portion, and when the first outer peripheral line includes multiple recessed portions or multiple protruding portions, the recessed portions and the protruding portions are connected one by one in a spaced manner.

[0019] Optionally, the endpoints of the protrusions are arranged adjacent to the corresponding tips.

[0020] Optionally, the shell-shaped dental appliance further comprises a connecting unit located on the occlusal surface of the appliance, the connecting unit connecting the two supporting units, a second outer peripheral line is formed at the junction area between the connecting unit and the occlusal surface, and the second outer peripheral line is connected to the first outer peripheral line.

[0021] Optionally, the first outer peripheral line extends in the mesiodistal direction of the orthodontic appliance and connects to the second outer peripheral line, and there is a smooth transition between the first outer peripheral line and the second outer peripheral line.

[0022] Optionally, the second outer peripheral line includes a lingual line close to the lingual surface of the orthodontic device and a buccal line close to the buccal surface of the orthodontic device, the lingual line is recessed toward the buccal line, and the buccal line is recessed toward the lingual line.

[0023] Optionally, the second outer peripheral line includes a first end connected to one of the first outer peripheral lines and a second end connected to another first outer peripheral line. In the direction from the buccal surface to the lingual surface of the orthodontic device, the second outer peripheral line has a width, and the width tends to first decrease and then increase when transitioning from the first end to the second end.

[0024] Optionally, in the direction from the buccal surface of the orthodontic appliance to the lingual surface, the first outer peripheral line has a first width, the second outer peripheral line has a second width, the ratio of the maximum value of the first width to the minimum value of the second width is in the range of 0.15-0.5, the minimum value of the second width is not less than 0.5 mm, or the minimum value of the second width is in the range of 1 mm-4 mm.

[0025] Optionally, the shell-shaped dental appliance includes a plurality of support units and a plurality of connection units that are spaced apart and connected to each other.

[0026] Optionally, the support unit is surrounded to form a cavity, and the cavity is connected to the cavity.

[0027] An embodiment of the present application provides a shell-shaped dental instrument assembly, comprising a shell-shaped dental instrument and an opposing shell-shaped dental instrument as described in any one of the above technical solutions, one of the shell-shaped dental instrument and the opposing shell-shaped dental instrument is arranged corresponding to the maxillary teeth, and the other is arranged corresponding to the mandibular teeth.

[0028] Optionally, the mandibular shell-shaped dental device includes a mandibular appliance and a guide portion located on the occlusal surface of the mandibular appliance. When in an occlusal state, the guide portion and the support unit cooperate with each other in the mesiodistal direction to achieve horizontal movement of the maxillary teeth or mandibular teeth.

[0029] Optionally, the mandibular shell-shaped dental instrument includes a mandibular appliance having a cavity for accommodating teeth, and when the upper and lower jaws are in an occlusal state, the support unit abuts the occlusal surface of the mandibular appliance, or the support unit abuts the mandibular support unit located on the occlusal surface of the mandibular appliance.

[0030] An embodiment of the present application provides a dental orthodontic appliance, comprising an appliance body and a jaw pad located on the occlusal surface of the appliance body, wherein the occlusal surface comprises a first occlusal surface and a second occlusal surface connected to each other, wherein the first occlusal surface is arranged corresponding to the occlusal surface of the teeth, and the second occlusal surface is arranged corresponding to the gap between adjacent teeth, and the jaw pad located on the second occlusal surface tends to retract inward.

[0031] Optionally, the junction area between the jaw pad and the occlusal surface forms an outer contour line, and the outer contour line has a width in the direction from the buccal surface to the lingual surface of the orthodontic appliance body, and the width tends to decrease when the first occlusal surface transitions to the second occlusal surface.

[0032] Optionally, the outer contour line is formed by a plurality of curve segments, and there is a smooth transition between adjacent curves.

[0033] Optionally, the outer contour line includes a first outer contour line corresponding to the first occlusal surface and a second outer contour line corresponding to the second occlusal surface, the width of the first outer contour line is a first width, the width of the second outer contour line is a second width, and the ratio of the maximum value of the first width to the minimum value of the second width is in the range of 0.15-0.5.

[0034] Optionally, the minimum value of the second width is not less than 0.5 mm, or the minimum value of the second width is in the range of 1 mm to 4 mm, and the minimum value of the first width is greater than or equal to the maximum value of the second width.

[0035] Optionally, the outer contour line includes a first outer contour line corresponding to the first occlusal surface, the first outer contour line corresponding to a tooth includes a connected first peak segment, a first trough segment and a second peak segment, or the first outer contour line corresponding to a tooth includes a connected first trough segment, a first peak segment and a second trough segment.

[0036] Optionally, the outer contour line includes a second outer contour line corresponding to the second occlusal surface, the second outer contour line is a trough segment, and the second outer contour line includes a first trough segment close to the lingual surface and a second trough segment close to the buccal surface.

[0037] Optionally, the jaw pad is arranged corresponding to multiple posterior teeth, the first occlusal surface includes a first area located in the middle and a second area arranged around the first area, the dividing line between the first area and the second area passes through multiple tips, and the multiple tips correspond to multiple tooth tips of the posterior teeth respectively. The junction area between the jaw pad and the first occlusal surface forms a first outer contour line, the first outer contour line includes an inner line located in the first area and an outer line located in the second area, and the outer line is connected to the inner line only in the mesiodistal direction of the orthodontic appliance body.

[0038] Optionally, a second outer contour line is formed at the junction of the jaw pad and the second occlusal surface, the outer line connects the inner line and the second outer contour line, and the second outer contour line and the outer lines at both ends form a trough section.

[0039] Optionally, the inner line includes a peak segment, and the endpoints of two adjacent trough segments on the same side form a baseline, and the maximum distance between the peak segment and the baseline on the same side is not less than 0.5mm, or the maximum distance ranges from 1mm to 3mm.

[0040] Optionally, the inner line includes a wave crest segment, and the endpoint of each wave crest segment is arranged adjacent to the corresponding tip.

[0041] Optionally, the inner line includes a first inner line close to the buccal surface of the orthodontic device body and a second inner line close to the lingual surface of the orthodontic device body, a first gap is provided between the first inner line and the corresponding dividing line, and a second gap is provided between the second inner line and the corresponding dividing line.

[0042] Optionally, the jaw pad includes an outer contour line formed at the junction area with the occlusal surface, an end face away from the occlusal surface, and a side surface connecting the outer periphery of the end face and the outer contour line, the end face and the side surface are arranged to form a cavity, the orthodontic appliance body has a cavity for accommodating teeth, and the cavity is connected to the cavity.

[0043] Optionally, the side surface is formed by a plurality of curved surfaces, and there is a smooth transition between adjacent curved surfaces.

[0044] Optionally, a plurality of points on the outer contour line form a reference plane, the side surface is perpendicular to the reference plane, or at least part of the side surface forms an acute angle with the reference plane.

[0045] Optionally, the shape of the end surface matches the shape of the opposing jaw occlusal surface.

[0046] Optionally, the dental orthodontic appliance further includes a filling portion located in the cavity.

[0047] Optionally, the jaw pad includes a plurality of first occlusal surfaces and a plurality of second occlusal surfaces that are spaced apart and connected to each other, and the jaw pad at each second occlusal surface has an inward-retracting tendency.

[0048] An embodiment of the present application provides a dental orthodontic appliance assembly, comprising a dental orthodontic appliance and an opposing dental orthodontic appliance as described in any one of the above technical solutions, wherein one of the dental orthodontic appliance and the opposing dental orthodontic appliance is arranged corresponding to the maxillary teeth, and the other is arranged corresponding to the mandibular teeth, and the opposing dental orthodontic appliance comprises an opposing appliance body and a guide portion located on the occlusal surface of the opposing appliance body, and when in an occlusal state, the guide portion and the jaw pad cooperate with each other in the mesiodistal direction to realize horizontal movement of the maxillary teeth or the mandibular teeth.

[0049] The present application provides a method for designing a digital jaw pad, including:

[0050] Acquire the target digital dental arch;

[0051] According to the outer contour of the target end face of the target digital jaw, a reference line of the digital jaw pad on the target end face is determined. The target end face is the tooth end face away from the gum in the target digital jaw. The reference line is used to generate the digital jaw pad.

[0052] Optionally, the reference line of the target end face is determined according to at least one of the following: the shape of the outer contour of the target end face and the tooth supporting capacity of the target end face.

[0053] Optionally, the design method includes:

[0054] offsetting the outer contour toward a direction approaching a reference line to form two inner contour lines respectively close to the buccal surface and the lingual surface, wherein the reference line extends in a mesiodistal direction and passes through the center of the target end surface or through the tooth cusp of the target end surface;

[0055] Connect two inner contour lines to form a closed reference line.

[0056] Optionally, the design method includes:

[0057] A reference area located inside the outer contour is formed on the target end surface, and a periphery of the reference area forms a closed reference line.

[0058] Optionally, the design method includes:

[0059] obtaining a tooth-supporting capacity of the target end surface;

[0060] The reference line is determined based on a tooth supporting capacity of at least a portion of the target end surface.

[0061] Optionally, the design method includes:

[0062] The distance between the reference line and the center line is determined according to the tooth supporting capacity, wherein the center line is defined as passing through the center of the target end face and extending in the mesiodistal direction, and the distance is the distance in the buccal-lingual direction, and the distance is proportional to the tooth supporting capacity.

[0063] Optionally, the design method includes:

[0064] Selecting a plurality of target points on the target end surface according to the tooth supporting capacity, wherein the vertical distance between the target points and a center line is proportional to the tooth supporting capacity, and the center line is defined as passing through the center of the target end surface and extending in the mesiodistal direction;

[0065] The reference line is formed by fitting a plurality of target points.

[0066] Optionally, the area where the baseline corresponds to the gap between adjacent teeth tends to shrink inward.

[0067] Optionally, the design method includes:

[0068] Selecting a plurality of first target points in the posterior tooth region of the target end surface, wherein the first target points are adjacent to the posterior tooth cusps;

[0069] and / or selecting a plurality of second target points in the posterior tooth region of the target end surface, wherein the second target points are located in at least one of the adjacent tooth gap and the pit and fissure region;

[0070] The reference line is formed by fitting a plurality of first target points and / or second target points.

[0071] Optionally, the first target point located on the same side is offset from a center line compared to the second target point, where the center line is defined as passing through the center of the target end surface and extending in the mesiodistal direction.

[0072] Optionally, the baseline includes two curves close to the buccal surface and the lingual surface respectively, the first target point is a protruding point of one of the curves relative to the other curve, and the second target point is a concave point of one of the curves relative to the other curve.

[0073] Optionally, the design method includes:

[0074] Selecting at least one third target point in the posterior tooth region of the target end surface, the third target point being located in the pit and fissure region, and the third target point being used to form the reference line;

[0075] The third target point is located at the proximal end of the reference line and is recessed toward the distal direction, and / or the third target point is located at the distal end of the reference line and is recessed toward the proximal direction.

[0076] Optionally, the design method includes:

[0077] The digital jaw pad is generated by adjusting the preset jaw pad based on the reference line and the occlusal relationship between the target digital jaw and the opposing digital jaw.

[0078] The present application provides a method for forming an appliance, comprising:

[0079] Obtaining a target digital jaw with a digital jaw pad according to the design method of the digital jaw pad described in any one of the above technical solutions;

[0080] Generate an appliance with a jaw pad.

[0081] An embodiment of the present application provides a brace, which is obtained according to the brace forming method as described above.

[0082] An embodiment of the present application provides an orthodontic appliance assembly, comprising an orthodontic appliance with a jaw pad as described above and an opposing jaw appliance with a guide portion, wherein the orthodontic appliance is arranged corresponding to one of the maxillary teeth or the mandibular teeth, and the opposing jaw appliance is arranged corresponding to the other one, and when in an occluded state, the guide portion and the jaw pad cooperate with each other in the mesiodistal direction to achieve horizontal movement of the maxillary teeth or the mandibular teeth.

[0083] The present application provides a device for designing a digital jaw pad, comprising:

[0084] The first module is used to obtain the target digital dental jaw;

[0085] The second module is used to determine the reference line of the digital jaw pad on the target end face of the target digital jaw according to the outer contour of the target end face of the target digital jaw. The target end face is the end face of the tooth away from the gum in the target digital jaw, and the reference line is used to generate the digital jaw pad.

[0086] An embodiment of the present application provides an electronic device, comprising a processor, a memory, and a communication bus, wherein the processor and the memory communicate with each other via the communication bus;

[0087] The memory is used to store application programs;

[0088] The processor is used to implement the steps of the digital jaw pad design method described in any one of the above technical solutions when executing the application stored in the memory.

[0089] An embodiment of the present application provides a storage medium having an application stored thereon. When the application is executed, the steps of the digital jaw pad design method described in any one of the above technical solutions are implemented.

[0090] Compared with the prior art, the beneficial effect of the present application is that the support unit of the embodiment of the present application can maintain a stable bite pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] FIG1 is a schematic diagram of a shell-shaped dental appliance according to a first embodiment (first specific example) of the present application;

[0092] FIG2 is a perspective view of a shell-shaped dental appliance corresponding to a single posterior tooth according to the first embodiment (first specific example) of the present application;

[0093] FIG3 is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to the first embodiment (first specific example) of the present application;

[0094] FIG4 is another schematic diagram of the shell-shaped dental appliance corresponding to a single posterior tooth according to the first embodiment (first specific example) of the present application;

[0095] FIG5 is another perspective view of the shell-shaped dental appliance corresponding to a single posterior tooth according to the first embodiment (first specific example) of the present application;

[0096] FIG6 is a schematic diagram of a shell-shaped dental appliance according to the first embodiment (second specific example) of the present application;

[0097] FIG7 is a schematic diagram of a partial area of ​​a shell-shaped dental appliance according to the first embodiment (second specific example) of the present application;

[0098] FIG8 is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to the first embodiment (second specific example) of the present application;

[0099] FIG9 is a schematic diagram of a shell-shaped dental appliance according to a second embodiment (first specific example) of the present application;

[0100] FIG10 is a perspective view of a shell-shaped dental appliance (with the support unit disposed perpendicularly relative to the jaw plane) corresponding to a single posterior tooth according to the second embodiment (first specific example) of the present application;

[0101] FIG11 is a schematic diagram of the support unit in FIG10 cooperating with the occlusal surface of the opposing jaw;

[0102] 12 is a perspective view of a shell-shaped dental appliance (with the support unit tilted relative to the jaw plane) corresponding to a single posterior tooth according to the second embodiment (first specific example) of the present application;

[0103] FIG13 is a schematic diagram of the support unit in FIG12 cooperating with the occlusal surface of the opposing jaw;

[0104] 14 and 15 are different schematic views of a shell-shaped dental appliance corresponding to a single posterior tooth according to the second embodiment (first specific example) of the present application;

[0105] FIG16 is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to a second embodiment (second specific example) of the present application;

[0106] FIG17 is a schematic diagram of a shell-shaped dental appliance according to a second embodiment (third specific example) of the present application;

[0107] FIG18 is a schematic diagram of a partial area of ​​a shell-shaped dental appliance according to the second embodiment (third specific example) of the present application;

[0108] FIG19 is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to the second embodiment (third specific example) of the present application;

[0109] 20 and 21 are schematic diagrams of a shell-shaped dental instrument assembly according to an embodiment of the present application;

[0110] FIG22 is a perspective view of a dental orthodontic appliance according to an embodiment of the present application;

[0111] FIG23 is another schematic diagram of a dental orthodontic appliance according to an embodiment of the present application;

[0112] FIG24 is a partial schematic diagram of a dental orthodontic appliance according to an embodiment of the present application;

[0113] FIG25 is another partial schematic diagram of the dental orthodontic appliance according to the embodiment of the present application;

[0114] FIG26 is a perspective view of a jaw pad located in the first area according to an embodiment of the present application;

[0115] FIG27 is a schematic diagram of a jaw pad located on a first occlusal surface according to an embodiment of the present application;

[0116] Figure 28 is a schematic diagram of a dental orthodontic appliance assembly according to an embodiment of the present application.

[0117] FIG29 is a diagram showing the steps of a method for designing a digital jaw pad according to an embodiment of the present application;

[0118] FIG30 is a top view of a target digitized dental jaw with a reference line generated according to an embodiment of the present application;

[0119] FIG31 is a schematic diagram of a target digital jaw and an opposing digital jaw in a specific occlusal state (with a digital jaw pad) according to an embodiment of the present application;

[0120] 32 to 35 are partial step diagrams of a method for designing a digital jaw pad according to an embodiment of the present application;

[0121] FIG36 is a schematic diagram of a target digitized dental jaw with a reference line generated according to an embodiment of the present application;

[0122] FIG37 is a schematic diagram of a posterior tooth of a digital dental jaw according to an embodiment of the present application;

[0123] FIG38 is a schematic diagram of a posterior tooth with a reference line according to an embodiment of the present application;

[0124] FIG39 is a schematic diagram of a digital dental jaw according to an embodiment of the present application;

[0125] FIG40 is a diagram showing the steps of a method for forming an appliance according to an embodiment of the present application;

[0126] FIG41 is a schematic diagram of an appliance with a jaw pad according to an embodiment of the present application;

[0127] FIG42 is a schematic diagram of an appliance assembly according to an embodiment of the present application;

[0128] FIG43 is a schematic diagram of a device for designing a digital jaw pad according to an embodiment of the present application. DETAILED DESCRIPTION

[0129] The present application will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are included within the scope of protection of the present application.

[0130] 1 and 2 , a shell-shaped dental appliance 100 according to an embodiment of the present application is illustrated.

[0131] The shell-shaped dental device 100 includes an appliance 10 having a cavity S for accommodating teeth and a support unit 20 . Each support unit 20 is provided corresponding to a posterior tooth in the posterior tooth region.

[0132] The occlusal surface A1 of the orthodontic appliance 10 includes a support surface A11 corresponding to the occlusal surface of a certain posterior tooth, that is, each support surface A11 is set corresponding to the occlusal surface of a posterior tooth, and the occlusal surface of the posterior tooth refers to the lower end surface of each maxillary posterior tooth or the upper end surface of each mandibular posterior tooth.

[0133] The support surface A11 includes a first support surface A111 located in the middle and a second support surface A112 arranged around the first support surface A111. The dividing line L between the first support surface A111 and the second support surface A112 passes through multiple tips R, and the multiple tips R correspond to multiple tooth tips of the posterior teeth respectively.

[0134] Here, the first support surface A111 is the central area of ​​the support surface A11, and the first support surface A111 corresponds to the central recessed portion in FIG2 ; the second support surface A112 is the peripheral area of ​​the support surface A11, and the second support surface A112 corresponds to the peripheral inclined portion in FIG2 (i.e., part of the second support surface A112 is connected to the buccal surface A2 and the lingual surface A3 of the appliance 10).

[0135] The support unit 20 of this embodiment is located on the support surface A11, and the boundary area between the support unit 20 and the support surface A11 forms a first outer peripheral line L1. At least part of the first outer peripheral line L1 is located within the first support surface A111, that is, at least part of the first outer peripheral line L1 does not exceed the separation line L.

[0136] In the first embodiment, referring to FIG. 1 to FIG. 4 , the first outer peripheral line L1 is entirely located within the first supporting surface A111 .

[0137] If the support unit 20 is set corresponding to the first support surface A111, the entire first support surface A111 can play a stable supporting role, which can improve the stability of the support unit 20 under the bite pressure. If the support unit 20 is set corresponding to the second support surface A112, it is the inclined surface that bears the bite pressure. The supporting effect of the inclined surface is unstable and it is easy to slip and collapse.

[0138] The entire support unit 20 of this embodiment is arranged corresponding to the first support surface A111, that is, the entire support unit 20 is arranged corresponding to the central area of ​​the support surface A11. The advantage of such an arrangement is that the entire support unit 20 is supported by the first support surface A111, and the first support surface A111 can provide stable support for the support unit 20, thereby maintaining a stable occlusal pressure to ensure that the occlusal pressure is borne by the corresponding posterior teeth, and to avoid the phenomenon of lateral sliding and collapse of the support unit 20.

[0139] Specifically, there is a gap between the first outer peripheral line L1 and the separation line L on the buccal surface A2 or the lingual surface A3 side close to the orthodontic appliance 10 .

[0140] On the side close to the buccal surface A2 of the orthodontic appliance 10, there is a first gap P1 between the first outer peripheral line L1 and the separation line L, and on the side close to the lingual surface A3 of the orthodontic appliance 10, there is a second gap P2 between the first outer peripheral line L1 and the separation line L. In this way, it can be ensured that the corresponding support unit 20 is located on the first support surface A111.

[0141] Optionally, the support unit 20 is surrounded to form a cavity S1 , and the cavity S1 is connected to the cavity S.

[0142] The appliance 10 may be an invisible appliance made of a polymer material, the cavity S having a geometric shape for repositioning the teeth from the current layout to the next layout, the support unit 20 may be integrally formed with the appliance 10, and the cavity S1 formed by the support unit 20 is interconnected with the cavity S formed by the appliance 10.

[0143] The support unit 20 that forms the cavity S1 is a hollow structure. The support unit 20 with a hollow structure is more prone to collapse. Combined with the above description, since the support unit 20 of this embodiment is supported as a whole by the first support surface A111 located in the central area of ​​the support surface A11, the support unit 20 with a hollow structure can be prevented from sliding and collapsing.

[0144] The shell-shaped dental apparatus 100 may further include a filling portion located in the cavity S1 . The filling portion may enhance the strength of the supporting unit 20 and further prevent the supporting unit 20 from collapsing.

[0145] Optionally, the support unit 20 includes a first outer peripheral line L1 formed at the junction with the support surface A11, an end surface 21 away from the support surface A11, and a side surface 22 connecting the end surface 21 and the first outer peripheral line L1. At this time, the end surface 21 and the side surface 22 form a cavity S1.

[0146] Optionally, the support unit 20 is vertically arranged relative to the jaw plane P, or the support unit 20 is inclined relative to the jaw plane P, and the jaw plane P is roughly a plane parallel to the horizontal plane.

[0147] In conjunction with Figure 2, "the support unit 20 is arranged vertically relative to the mandibular plane P" means that the central axis Z of the support unit 20 is roughly perpendicular to the mandibular plane P, that is, the support unit 20 extends roughly along the vertical direction, and the support unit 20 is defined to have a first cross-section in the direction parallel to the mandibular plane P. When the first cross-section remains consistent along the vertical direction, the support unit 20 can be regarded as a straight cylinder structure, and the side 22 of the support unit 20 is roughly perpendicular to the mandibular plane P, and the projection of the first outer peripheral line L1 on the mandibular plane P coincides with the projection of the periphery of the end face 21 on the mandibular plane P.

[0148] In other words, the side surface 22 of the support unit 20 is perpendicular to a plane formed by a plurality of points on the first outer peripheral line L1 .

[0149] Since the first outer peripheral line L1 is located on the support surface A11 of the orthodontic appliance 10, the multiple points forming the first outer peripheral line L1 are basically not on the same plane. Therefore, the plane enclosed by the first outer peripheral line L1 is represented here as "the plane enclosed by multiple points on the first outer peripheral line L1", and the plane passing through as many points on the first outer peripheral line L1 as possible is taken as the standard.

[0150] That is, the support unit 20 is arranged substantially perpendicular to the support surface A11 of the appliance 10 , and the contour line of the positive projection of the support unit 20 on the support surface A11 is the first outer peripheral line L1 , but this is not limited thereto.

[0151] In conjunction with Figure 5, "the support unit 20 is arranged at an angle relative to the jaw plane P" means that an acute angle is formed between the central axis Z of the support unit 20 and the jaw plane P, that is, the support unit 20 extends at an angle relative to the vertical direction. The inclined support unit 20 can reduce the difficulty of demolding and increase the occlusal contact area with the opposing jaw.

[0152] Optionally, the shape of the end surface 21 of the support unit 20 matches the shape of the occlusal surface of the opposing jaw.

[0153] Here, the "occlusal surface of the antagonist" can be the occlusal surface of the antagonist teeth, the occlusal surface of the antagonist appliance or the occlusal surface of the antagonist support unit, and "the shape of the end face 21 of the support unit 20 matches the shape of the occlusal surface of the antagonist" means that when the upper and lower jaws are occluded, the end face 21 of the support unit 20 and the occlusal surface of the antagonist can be matched together. In this way, the accuracy of the occlusal position and the stability of the occlusion can be improved, thereby improving the jaw correction effect.

[0154] This embodiment takes the end surface 21 of the support unit 20 as an example in which the end surface 21 is in an irregular shape, that is, the end surface 21 is a non-planar structure.

[0155] Optionally, the first outer peripheral line L1 includes multiple curves, and there is a smooth transition between adjacent curves.

[0156] Correspondingly, the side surface 22 is formed by a plurality of curved surfaces, and there is a smooth transition between adjacent curved surfaces.

[0157] The side surface 22 does not include a plane, or in other words, there is no right-angle, acute-angle or obtuse-angle transition on the side surface 22. In this way, the occlusal pressure on the entire support unit 20 can be evenly distributed, avoiding the presence of stress concentration areas on the support unit 20, thereby enhancing the strength of the support unit 20. Moreover, when the shell-shaped dental device 100 with the support unit 20 is obtained by demolding, the arc transition can effectively reduce the difficulty of demolding.

[0158] Optionally, the first outer peripheral line L1 includes at least one recessed portion and at least one protruding portion, and when the first outer peripheral line L1 includes multiple recessed portions or multiple protruding portions, the recessed portions and the protruding portions are spaced apart from each other, that is, the first outer peripheral line L1 at this time is roughly a wavy structure.

[0159] The structure between two adjacent protrusions is a recessed portion, and similarly, the structure between two adjacent recessed portions is a protrusion. The protrusion can further enhance the strength of the corresponding support unit 20 .

[0160] The end point M of the protrusion is disposed adjacent to the corresponding tip R, wherein the “end point M of the protrusion” refers to the highest point of the protrusion, ie, the peak point of the protrusion.

[0161] That is to say, the endpoint of the protrusion and the tip R of M match each other in position. For example, corresponding to a certain posterior tooth, the endpoint M of the protrusion is closer to the center of the posterior tooth than the corresponding tip R, and the distance between the endpoint M and the tip R of each protrusion remains basically consistent. At this time, corresponding to the posterior teeth of different patients or different posterior teeth of the same patient, the protrusion is personalized, so that the support unit 20 is more matched with the corresponding posterior teeth.

[0162] Optionally, the first outer peripheral line L1 is a symmetrical structure, which can enhance the force uniformity of the corresponding support unit 20 .

[0163] Next, two specific examples of the shell-shaped dental instrument 100 of the first embodiment are introduced.

[0164] In the first specific embodiment, referring to FIG. 1 to FIG. 5 , the first outer peripheral line L1 formed by the boundary area between the support unit 20 and the support surface A11 is a ring-shaped closed structure, and the first outer peripheral line L1 is spaced from the separation line L.

[0165] The support unit 20 is an independent structure that is not connected to other structures. Each support unit 20 is independently set corresponding to a posterior tooth. At this time, the support unit 20 can be personalized according to the specific size of the posterior teeth, the occlusal pressure to be borne, etc. For example, support units 20 of different shapes and sizes can be personalized for different posterior teeth.

[0166] 1 , the annular closed structure formed by the first outer peripheral line L1 is substantially in the shape of a plum blossom.

[0167] The annular closed structure formed by the first outer peripheral line L1 at the posterior tooth No. 16 shown in Figure 1 is a centrally symmetrical structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and four recesses are connected one by one at intervals, and the four protrusions have the same shape.

[0168] The annular closed structure formed by the first outer peripheral line L1 at the posterior tooth No. 14 shown in Figure 1 is an axisymmetric structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and four recesses are connected one by one at intervals. The two protrusions located on the same straight line have the same shape, and because the size of the posterior tooth in the mesiodistal direction is small, the size of the protrusion of the first outer peripheral line L1 in the mesiodistal direction is also relatively small.

[0169] In this specific embodiment, combined with Figure 3, the first outer peripheral line L1 is an annular closed structure. In all directions, there is a gap between the first outer peripheral line L1 and the separation line L, that is, the first outer peripheral line L1 is located in the absolute center area of ​​the first support surface A111.

[0170] Specifically, on the side close to the buccal surface A2 of the orthodontic appliance 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and the first outer peripheral line L1 includes a protrusion close to the buccal surface A2. In the direction of the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0171] On the side close to the lingual surface A3 of the orthodontic appliance 10, there is a second gap P2 between the first outer peripheral line L1 and the separation line L. The first outer peripheral line L1 includes a protrusion close to the lingual surface A3. In the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the second gap P2 between the protrusion and the separation line L is not less than 1 mm.

[0172] Combined with Figure 4, compared with the first outer peripheral line L1 in Figure 3, the first outer peripheral line L1 in Figure 4 extends in the mesial and distal directions and contacts the dividing line L. At this time, the first outer peripheral line L1 has not exceeded the dividing line L, and the proximal and distal ends of the first outer peripheral line L1 coincide with the dividing line L. At this time, the first outer peripheral line L1 is still a ring-shaped closed structure.

[0173] The first outer peripheral line L1 in Figure 4 can still be regarded as being located in the central area of ​​the first support surface A111, and since the first outer peripheral line L1 is relatively long at this time, the corresponding size of the support unit 20 is also relatively large, and the support unit 20 can provide a larger area to maintain a greater bite pressure.

[0174] Specifically, on the side close to the buccal surface A2 of the orthodontic appliance 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and the first outer peripheral line L1 includes a protrusion close to the buccal surface A2. In the direction of the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0175] On the side close to the lingual surface A3 of the orthodontic appliance 10, there is a second gap P2 between the first outer peripheral line L1 and the separation line L. The first outer peripheral line L1 includes a protrusion close to the lingual surface A3. In the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the second gap P2 between the protrusion and the separation line L is not less than 1 mm.

[0176] 6 to 8 , which are schematic diagrams of a shell-shaped dental appliance 100 according to a second embodiment, for ease of description, identical or similar structures are numbered identically or similarly.

[0177] In this specific embodiment, the shell-shaped dental device 100 also includes a connecting unit 30 located on the occlusal surface A1 of the orthodontic appliance 10, the connecting unit 30 connects the two supporting units 20, and the junction area between the connecting unit 30 and the occlusal surface A1 forms a second outer peripheral line L2, and the second outer peripheral line L2 is connected to the first outer peripheral line L1.

[0178] The support unit 20 is connected to other structures. The first outer peripheral line L1 formed by the junction area of ​​a support unit 20 and the support surface A11 is not a closed structure. The free end of the first outer peripheral line L1 is connected to the second outer peripheral line L2, which corresponds to the support unit 20 and the connecting unit 30 being connected together to cover multiple posterior teeth. At this time, multiple support units 20 can provide more area to maintain greater occlusal pressure.

[0179] Specifically, on the side close to the buccal surface A2 of the orthodontic appliance 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and the first outer peripheral line L1 includes a protrusion close to the buccal surface A2. In the direction of the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0180] On the side close to the lingual surface A3 of the orthodontic appliance 10, there is a second gap P2 between the first outer peripheral line L1 and the separation line L. The first outer peripheral line L1 includes a protrusion close to the lingual surface A3. In the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the second gap P2 between the protrusion and the separation line L is not less than 1 mm.

[0181] The occlusal surface A1 includes a connecting surface A12 connecting two adjacent support surfaces A11. The connecting surface A12 actually connects the mesial end of one of the second support surfaces A112 and the distal end of the other second support surface A112. The connecting surface A12 is set corresponding to the adjacent tooth gap. The "adjacent tooth gap" refers to the area between two adjacent teeth.

[0182] It can be understood that since the support unit 20 is connected to the first support surface A111, the connection unit 30 connecting the two adjacent support units 20 is actually connected to the connection surface A12 and the second support surface A112, that is, the connection unit 30 extends from the connection surface A12 to the second support surface A112 on both sides to connect the two support units 20 on both sides.

[0183] 7 and 8 , the first outer peripheral line L1 extends to the separation line L and connects to the second outer peripheral line L2 , and a smooth transition is formed between the first outer peripheral line L1 and the second outer peripheral line L2 .

[0184] The second outer peripheral line L2 is connected to the proximal end or distal end of the first outer peripheral line L1, and the second outer peripheral line L2 extends to cover the connecting surface A12 and the second support surface A112 located on both sides of the connecting surface A12. The smooth transition between the first outer peripheral line L1 and the second outer peripheral line L2 can further improve the strength of the support unit 20 and the connecting unit 30 and the smoothness of the transition between the two.

[0185] In this embodiment, the first outer peripheral line L1 corresponding to a certain posterior tooth can also be regarded as a symmetrical structure, and the first outer peripheral line L1 includes a protruding portion and a recessed portion to improve the strength of the support unit 20 .

[0186] The second outer peripheral line L2 includes a lingual line L21 close to the lingual surface A3 of the orthodontic appliance 10 and a buccal line L22 close to the buccal surface A2 of the orthodontic appliance 10. The lingual line L21 is concave toward the buccal line L22, and the buccal line L22 is concave toward the lingual line L21.

[0187] In other words, the second outer peripheral line L2 includes a first end L2' connected to one of the first outer peripheral lines L1 and a second end L2" connected to the other first outer peripheral line L1. In the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the second outer peripheral line L2 has a width, and the width tends to first decrease and then increase when transitioning from the first end L2' to the second end L2".

[0188] It can be seen that at this time, the connection unit 30 corresponding to the second outer peripheral line L2 generally shows an inward shrinking trend.

[0189] In the direction from the buccal surface of the posterior teeth to the lingual surface, the width of the occlusal surface of the posterior teeth is greater than the width of the gap between the adjacent teeth. When the support unit 20 and the connecting unit 30 are subjected to the occlusal pressure applied by the jaw, the occlusal surface of the posterior teeth provides support for the support unit 20 located on the first support surface A111, and the gap between the adjacent teeth provides support for the connecting unit 30 located at the gap between the adjacent teeth. That is to say, the relatively wide occlusal surface of the posterior teeth supports the relatively wide support unit 20, and the relatively narrow gap between the adjacent teeth supports the relatively narrow connecting unit 30. At this time, there are teeth (occlusal surface of the posterior teeth or gap between the adjacent teeth) below to provide support for the support unit 20 and the connecting unit 30, so as to avoid deformation and collapse of the support unit 20 and the connecting unit 30 due to the lack of tooth support below.

[0190] In the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10 , the first outer peripheral line L1 has a first width d1 , and the second outer peripheral line L2 has a second width d2 .

[0191] The first width d1 and the second width d2 are both variable widths. The first width d1 is relatively large to correspond to the relatively wide support unit 20 located on the first support surface A111, and the second width d2 is relatively small to correspond to the relatively narrow connection unit 30 located in the gap between adjacent teeth. By reasonably designing the first width d1 and the second width d2, the support unit 20 and the connection unit 30 can be supported by teeth below, and the first width d1 and the second width d2 can be personalized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0192] Specifically, the ratio of the maximum value of the first width d1 to the minimum value of the second width d2 is in the range of 0.15-0.5, and the minimum value of the second width d2 is not less than 0.5 mm.

[0193] Since the width of the area in the gap between adjacent teeth that can provide support for the connecting unit 30 is relatively narrow, a narrower second width d2 is required to avoid a lack of tooth support below the connecting unit 30. When the second width d2 is too narrow, the process difficulty will increase, and when the second width d2 is directly zero (that is, multiple support units 20 are distributed at intervals), the difficulty of demolding will be greatly increased.

[0194] While taking into account the difficulty of process and demoulding as well as making the second width d2 as narrow as possible, this specific embodiment controls the minimum value of the second width d2 to be no less than 0.5 mm. Preferably, the minimum value of the second width d2 is in the range of 1 mm to 4 mm.

[0195] In addition, the minimum value of the first width d1 is greater than or equal to the maximum value of the second width d2, which further ensures that the first width d1 is relatively large and the second width d2 is relatively small.

[0196] In this specific embodiment, the shell-shaped dental device 100 includes a plurality of support units 20 and a plurality of connecting units 30 connected one by one at intervals, that is, the occlusal surface of the orthodontic appliance 10 is provided with a support unit 20, a connecting unit 30, a support unit 20, a connecting unit 30, and so on connected in sequence.

[0197] Each connecting unit 30 has an inward-contracting tendency, and the degree of inward-contracting of the connecting unit 30 at each second supporting surface A12 is related to the width of the adjacent tooth gap corresponding to the second supporting surface A12 .

[0198] It can be seen that the connection unit 30 at the second support surface A12 is also customized to correspond to the posterior teeth of different patients or different posterior teeth of the same patient.

[0199] In general, the various parameters of this specific embodiment can be customized according to a single case. The parameters include the first width d1 of the support unit 20, the second width d2 of the connection unit 30, the relationship between the end point M and the tip R of each protrusion, the peak section and the trough section in the first outer peripheral line L1 and the second outer peripheral line L2, the connection relationship between the first outer peripheral line L1 and the second outer peripheral line L2, the gap between the first outer peripheral line L1 and the separating line L, etc. In this way, the support unit 20 and the connection unit 30 can be more matched with the posterior teeth, and each part of the support unit 20 and the connection unit 30 can be supported by teeth underneath.

[0200] To sum up, the entire support unit 20 of the first embodiment is set corresponding to the first support surface A111, that is, the entire support unit 20 is set corresponding to the central area of ​​the support surface A11. The advantage of such a setting is that the entire support unit 20 is supported by the first support surface A111, and the first support surface A111 can provide stable support for the support unit 20, thereby maintaining a stable occlusal pressure to ensure that the occlusal pressure is borne by the corresponding posterior teeth, and to avoid the phenomenon of lateral sliding and collapse of the support unit 20.

[0201] In the second embodiment, in combination with Figures 9 to 11, the first outer peripheral line L1 includes a first portion L11 located on the first support surface A111 and a second portion L12 located on the second support surface A112, the second portion L12 is connected to the first portion L11, and the second portion L12 is located on the buccal side or the lingual side of the first support surface A111, that is, part of the first outer peripheral line L1 of the second embodiment is located inside the first support surface A111, and the other part is located outside the first support surface A111.

[0202] “The first portion L11 located on the first supporting surface A111 ” means that the first portion L11 does not exceed the dividing line L, and the first portion L11 is on the inner side of the dividing line L.

[0203] “The second portion L12 located on the second supporting surface A112 ” means that the second portion L12 exceeds the dividing line L, and the second portion L12 is outside the dividing line L.

[0204] “The second portion L12 is connected to the first portion L11 ” means that the second portion L12 and the first portion L11 are located in the same supporting unit 20 , and the second portion L12 and the first portion L11 are a continuous structure.

[0205] "The second part L12 is located on the buccal or lingual side of the first support surface A111" means that the second part L12 can be regarded as an extension of the first part L11 toward the buccal surface A2 and the lingual surface A3 of the orthodontic appliance 10. Whether the second part L12 is located on the buccal or lingual side of the first support surface A111 can be determined based on the positional relationship between the upper and lower jaws, and the extension direction of the second part L12 can be determined based on the direction of the malocclusion.

[0206] For example, when the occlusal surface of the opposing jaw and the support unit 20 that cooperates with each other is mainly close to the buccal side of the first support surface A111 (that is, the malocclusion direction is on the buccal side), the second part L12 is located on the buccal side of the first support surface A111 to increase the contact area between the support unit 20 corresponding to the second part L12 and the occlusal surface of the opposing jaw; when the occlusal surface of the opposing jaw and the support unit 20 that cooperates with each other is mainly close to the lingual side of the first support surface A111 (that is, the malocclusion direction is on the lingual side), the second part L12 is located on the lingual side of the first support surface A111 to increase the contact area between the support unit 20 corresponding to the second part L12 and the occlusal surface of the opposing jaw. In Figure 11, taking the malocclusion direction on the lingual side as an example, the second part L12 is located on the lingual side of the first support surface A111.

[0207] The "opposing occlusal surface" may be the occlusal surface of the opposing teeth, the occlusal surface of the opposing appliance, or the occlusal surface of the opposing support unit.

[0208] In this embodiment, a part of the support unit 20 (the part corresponding to the first part L12) is set corresponding to the first support surface A111, and the other part (the part corresponding to the second part L12) is set corresponding to the second support surface A112. The advantage of such a setting is that the first support surface A111 can provide stable support for the support unit 20, thereby maintaining a stable occlusal pressure. The support unit 20 extends to the second support surface A112 to increase the contact area with the opposing jaw occlusal surface, thereby achieving the purpose of stable occlusion.

[0209] Optionally, the second portion L12 is located on one of the buccal and lingual sides of the first support surface A111, that is, the second portion L12 is located only on the buccal side of the first support surface A111 and not on the lingual side of the first support surface A111, or, the second portion L12 is located only on the lingual side of the first support surface A111 and not on the buccal side of the first support surface A111, that is, in the buccal and lingual direction of the orthodontic appliance 10, a portion of the first outer peripheral line L1 is located on the first support surface A111, and the other portion is located on the second support surface A112.

[0210] Optionally, the second portion L12 is located on the buccal side of the first support surface A111, and there is a gap between the area of ​​the first portion L11 close to the lingual surface A3 of the appliance 10 and the dividing line L, or, the second portion L12 is located on the lingual side of the first support surface A111, and there is a gap between the area of ​​the first portion L11 close to the buccal surface of the appliance 10 and the dividing line L, that is, in the buccal and lingual direction of the appliance 10, a portion of the first outer peripheral line L1 is located on the first support surface A111, and the other portion is located on the second support surface A112.

[0211] Optionally, in combination with Figures 10 and 11, the support unit 20 is vertically arranged relative to the jaw plane P, or, in combination with Figures 12 and 13, the support unit 20 is inclined relative to the jaw plane P, and the jaw plane P is roughly a plane parallel to the horizontal plane.

[0212] The support unit 20 includes a first outer peripheral line L1 formed at the junction area with the support surface A11, an end surface 21 away from the support surface A11, and a side surface 22 connecting the end surface 21 and the first outer peripheral line L1. At this time, the end surface 21 and the side surface 22 form a cavity S1.

[0213] In conjunction with Figure 10, "the support unit 20 is arranged vertically relative to the mandibular plane P" means that the central axis Z of the support unit 20 is roughly perpendicular to the mandibular plane P, that is, the support unit 20 extends roughly along the vertical direction, and the support unit 20 is defined to have a first cross-section in the direction parallel to the mandibular plane P. When the first cross-section remains consistent along the vertical direction, the support unit 20 can be regarded as a straight cylinder structure, and the side 22 of the support unit 20 is roughly perpendicular to the mandibular plane P, and the projection of the first outer peripheral line L1 on the mandibular plane P coincides with the projection of the periphery of the end face 21 on the mandibular plane P.

[0214] When the support unit 20 is arranged vertically relative to the jaw plane P, the contact area between the support unit 20 and the opposing jaw occlusal surface is increased by the support unit 20 corresponding to the second portion L12.

[0215] 12 , “the support unit 20 is tilted relative to the jaw plane P” means that an acute angle is formed between the central axis Z of the support unit 20 and the jaw plane P, that is, the support unit 20 extends tilted relative to the vertical direction.

[0216] When the second part L12 is located on the buccal side of the first support surface A111, the support unit 20 is tilted toward the buccal surface A2 of the appliance 10. At this time, on the basis of increasing the contact area between the support unit 20 and the occlusal surface of the opposing jaw by the support unit 20 corresponding to the second part L12, the contact area between the support unit 20 and the occlusal surface of the opposing jaw is further increased by the support unit 20 tilted toward the buccal surface A2 of the appliance 10.

[0217] When the second part L12 is located on the lingual side of the first support surface A111, the support unit 20 is inclined toward the side of the lingual surface A3 of the orthodontic appliance 10. At this time, on the basis of increasing the contact area between the support unit 20 and the occlusal surface of the opposing jaw by using the support unit 20 corresponding to the second part L12, the contact area between the support unit 20 and the occlusal surface of the opposing jaw is further increased by using the support unit 20 inclined toward the side of the lingual surface A3 of the orthodontic appliance 10. Figure 13 illustrates the example of the second part L12 being located on the lingual side of the first support surface A111.

[0218] In addition, the inclined support unit 20 can also reduce the difficulty of demoulding.

[0219] Optionally, the shape of the end surface 21 of the support unit 20 matches the shape of the occlusal surface of the opposing jaw.

[0220] "The shape of the end face 21 of the support unit 20 matches the shape of the occlusal surface of the opposing jaw" means that when the upper and lower jaws are occluded, the end face 21 of the support unit 20 and the occlusal surface of the opposing jaw can be matched together. In this way, the accuracy of the occlusal position and the stability of the occlusion can be improved, thereby improving the jaw correction effect.

[0221] This embodiment takes the end surface 21 of the support unit 20 as an example in which the end surface 21 is in an irregular shape, that is, the end surface 21 is a non-planar structure.

[0222] Optionally, the support unit 20 is surrounded to form a cavity S1 , and the cavity S1 is connected to the cavity S.

[0223] The appliance 10 may be an invisible appliance made of a polymer material, the cavity S having a geometric shape for repositioning the teeth from the current layout to the next layout, the support unit 20 may be integrally formed with the appliance 10, and the cavity S1 formed by the support unit 20 is interconnected with the cavity S formed by the appliance 10.

[0224] The support unit 20 forming the cavity S1 is a hollow structure. The support unit 20 with a hollow structure is more prone to collapse. The shell-shaped dental device 100 may further include a filling portion located in the cavity S1. The filling portion can enhance the strength of the support unit 20 and further prevent the support unit 20 from collapsing.

[0225] Optionally, the first outer peripheral line L1 includes multiple curves, and there is a smooth transition between adjacent curves.

[0226] Correspondingly, the side surface 22 of the support unit 20 is formed by a plurality of curved surfaces, and there is a smooth transition between adjacent curved surfaces.

[0227] The side surface 22 does not include a plane, or in other words, there is no right-angle, acute-angle or obtuse-angle transition on the side surface 22. In this way, the occlusal pressure on the entire support unit 20 can be evenly distributed, avoiding the presence of stress concentration areas on the support unit 20, thereby enhancing the strength of the support unit 20. Moreover, when the shell-shaped dental device 100 with the support unit 20 is obtained by demolding, the arc transition can effectively reduce the difficulty of demolding.

[0228] Optionally, the first outer peripheral line L1 includes at least one recessed portion and at least one protruding portion, and when the first outer peripheral line L1 includes multiple recessed portions or multiple protruding portions, the recessed portions and the protruding portions are spaced apart from each other, that is, the first outer peripheral line L1 at this time is roughly a wavy structure.

[0229] It can be understood that the structure between two adjacent protrusions is a recessed portion, and similarly, the structure between two adjacent recessed portions is a protrusion. The protrusion can further enhance the strength of the corresponding support unit 20.

[0230] The endpoint M of the protrusion is set adjacent to the corresponding tip R, wherein the "endpoint M of the protrusion" refers to the highest point of the protrusion, that is, the peak point of the protrusion, and the endpoint M of the protrusion includes the endpoint M1 of the protrusion at the first part L11 and the endpoint M2 of the protrusion at the second part L12.

[0231] The endpoint M and the tip R of the protrusion match each other in position. For example, corresponding to a certain posterior tooth, the endpoint M1 of the protrusion of the first part L11 is closer to the center of the posterior tooth than the corresponding tip R, and the distance between the endpoint M1 of each protrusion and the tip R remains basically consistent; the endpoint M2 of the protrusion of the second part L12 is farther away from the center of the posterior tooth than the corresponding tip R, and the distance between the endpoint M2 of each protrusion and the tip R remains basically consistent. At this time, corresponding to the posterior teeth of different patients or different posterior teeth of the same patient, the protrusion is personalized, so that the support unit 20 is more matched with the corresponding posterior tooth.

[0232] In addition, the first outer peripheral line L1 is a symmetrical structure, which can enhance the force uniformity of the corresponding support unit 20 .

[0233] Next, two specific examples of the shell-shaped dental appliance 100 according to the second embodiment will be described.

[0234] In the first specific embodiment, referring to FIG9 to FIG15 , the first outer peripheral line L1 formed by the boundary area between the support unit 20 and the support surface A11 is an annular closed structure, and there is a gap or overlap between the first portion L11 and the proximal and distal ends of the separation line L.

[0235] That is to say, the support unit 20 at this time is an independent structure that is not connected to other structures. Each support unit 20 is independently set corresponding to a back tooth. At this time, the support unit 20 can be personalized according to the specific size of the back teeth, the occlusal pressure to be borne, etc. For example, support units 20 of different shapes and sizes can be personalized for different back teeth.

[0236] 9 , the annular closed structure formed by the first outer peripheral line L1 is roughly in the shape of a plum blossom.

[0237] The annular closed structure formed by the first outer peripheral line L1 at the posterior tooth No. 16 shown in Figure 9 is a centrally symmetrical structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and four recesses are connected one by one at intervals, and the four protrusions have the same shape.

[0238] The annular closed structure formed by the first outer peripheral line L1 at the posterior tooth No. 14 shown in Figure 9 is an axisymmetric structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and four recesses are connected one by one at intervals. The two protrusions located on the same straight line have the same shape, and because the size of the posterior tooth in the mesiodistal direction is relatively small, the size of the protrusion of the first outer peripheral line L1 in the mesiodistal direction is also relatively small.

[0239] In this specific embodiment, combined with Figure 14, the first outer peripheral line L1 is an annular closed structure, and there is a gap between the first part L11 of the first outer peripheral line L1 and the dividing line L. There are gaps between the first part L11 and the proximal end, distal end and buccal side of the dividing line L, that is, the second part L12 at this time is only located on the lingual side of the first support surface A111.

[0240] Specifically, taking the example of a first gap P1 between the first part L11 and the dividing line L close to the buccal surface A2 of the orthodontic appliance 10, the first part L11 includes a protrusion close to the buccal surface A2, and in the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0241] Combined with Figure 15, compared with the first outer peripheral line L1 in Figure 14, the first part L11 in Figure 15 coincides with the proximal end and distal end of the dividing line L, that is, the first outer peripheral line L1 in Figure 15 extends in the proximal direction and distal direction and contacts the dividing line L. At this time, the first part L11 of the first outer peripheral line L1 still does not exceed the dividing line L, and the proximal end and distal end of the first outer peripheral line L1 coincide with the dividing line L. At this time, the first outer peripheral line L1 is still a ring-shaped closed structure.

[0242] In addition, the first outer peripheral line L1 of FIG. 15 is relatively long, and the corresponding size of the support unit 20 is also relatively large. The support unit 20 can provide a larger area to maintain a greater occlusal pressure.

[0243] Specifically, taking the example of a first gap P1 between the first part L11 and the dividing line L close to the buccal surface A2 of the orthodontic appliance 10, the first part L11 includes a protrusion close to the buccal surface A2, and in the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0244] 16 is a schematic diagram of a shell-shaped dental appliance 100 according to a second embodiment. For ease of description, identical or similar structures are numbered identically or similarly.

[0245] The main difference between the second specific embodiment and the first specific embodiment is that the second part L12 is also located on the mesial side and / or distal side of the first support surface A111. Here, taking the example that the second part L12 is located on the mesial side, distal side and lingual side of the first support surface A111 at the same time, there is a gap between the first part L11 and the buccal side of the dividing line L.

[0246] Specifically, taking the example of a first gap P1 between the first part L11 and the dividing line L close to the buccal surface A2 of the orthodontic appliance 10, the first part L11 includes a protrusion close to the buccal surface A2, and in the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0247] 17 to 19 are schematic diagrams of a shell-shaped dental appliance 100 according to a third embodiment. For ease of description, identical or similar structures are numbered identically or similarly.

[0248] In this specific embodiment, the shell-shaped dental device 100 also includes a connecting unit 30 located on the occlusal surface A1 of the orthodontic appliance 10, the connecting unit 30 connects the two supporting units 20, and the junction area between the connecting unit 30 and the occlusal surface A1 forms a second outer peripheral line L2, and the second outer peripheral line L2 is connected to the first outer peripheral line L1.

[0249] That is to say, at this time, the support unit 20 is connected to other structures, and the first outer peripheral line L1 formed by the junction area of ​​a support unit 20 and the support surface A11 is not a closed structure. The free end of the first outer peripheral line L1 is connected to the second outer peripheral line L2, which corresponds to the support unit 20 and the connecting unit 30 being connected together to cover multiple posterior teeth. At this time, multiple support units 20 can provide more area to maintain greater occlusal pressure.

[0250] It should be noted that, taking the example of a first gap P1 between the first part L11 and the dividing line L close to the buccal surface A2 of the orthodontic appliance 10, the first part L11 includes a protrusion close to the buccal surface A2, and in the direction of the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the first gap P1 between the protrusion and the dividing line L is not less than 1 mm.

[0251] The occlusal surface A1 includes a connecting surface A12 connecting two adjacent support surfaces A11. The connecting surface A12 actually connects the mesial end of one of the second support surfaces A112 and the distal end of the other second support surface A112. The connecting surface A12 is set corresponding to the adjacent tooth gap. The "adjacent tooth gap" refers to the area between two adjacent teeth.

[0252] Since the support unit 20 is connected to the first support surface A111, the connection unit 30 connecting two adjacent support units 20 is actually connected to the connection surface A12 and the second support surface A112. That is, the connection unit 30 extends from the connection surface A12 to the second support surface A112 on both sides to connect the two support units 20 on both sides.

[0253] The first outer peripheral line L1 extends in the mesio-distal direction of the orthodontic appliance 10 and connects to the second outer peripheral line L2 , and the first outer peripheral line L1 and the second outer peripheral line L2 have a smooth transition.

[0254] The second outer peripheral line L2 is connected to the proximal end or distal end of the first outer peripheral line L1, and the second outer peripheral line L2 extends to cover the connecting surface A12 and the second support surface A112 located on both sides of the connecting surface A12. The smooth transition between the first outer peripheral line L1 and the second outer peripheral line L2 can further improve the strength of the support unit 20 and the connecting unit 30 and the smoothness of the transition between the two.

[0255] In this embodiment, the first outer peripheral line L1 corresponding to a certain posterior tooth can also be regarded as a symmetrical structure, and the first outer peripheral line L1 includes a protruding portion and a recessed portion to improve the strength of the support unit 20 .

[0256] The second outer peripheral line L2 includes a lingual line L21 close to the lingual surface A3 of the orthodontic appliance 10 and a buccal line L22 close to the buccal surface A2 of the orthodontic appliance 10. The lingual line L21 is concave toward the buccal line L22, and the buccal line L22 is concave toward the lingual line L21.

[0257] In other words, the second outer peripheral line L2 includes a first end L2' connected to one of the first outer peripheral lines L1 and a second end L2" connected to the other first outer peripheral line L1. In the direction from the buccal surface A2 of the orthodontic appliance 10 toward the lingual surface A3, the second outer peripheral line L2 has a width, and the width tends to first decrease and then increase when transitioning from the first end L2' to the second end L2".

[0258] The connection unit 30 corresponding to the second outer peripheral line L2 generally has an inward shrinking trend.

[0259] In the direction from the buccal surface A2 of the posterior teeth toward the lingual surface A3, the width of the occlusal surface of the posterior teeth is greater than the width of the gap between the adjacent teeth. When the support unit 20 and the connecting unit 30 are subjected to the occlusal pressure applied by the jaw, the occlusal surface of the posterior teeth provides support for the support unit 20 located on the support surface A11, and the gap between the adjacent teeth provides support for the connecting unit 30 located at the gap between the adjacent teeth. That is to say, the relatively wide occlusal surface of the posterior teeth supports the relatively wide support unit 20, and the relatively narrow gap between the adjacent teeth supports the relatively narrow connecting unit 30. At this time, there are teeth (occlusal surface of the posterior teeth or gap between the adjacent teeth) below to provide support for the support unit 20 and the connecting unit 30, so as to avoid deformation and collapse of the support unit 20 and the connecting unit 30 due to the lack of tooth support below.

[0260] In addition, in the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10 , the first outer peripheral line L1 has a first width d1 , and the second outer peripheral line L2 has a second width d2 .

[0261] Here, the first width d1 and the second width d2 are both variable widths. The first width d1 is relatively large to correspond to the relatively wide support unit 20 located on the support surface A11, and the second width d2 is relatively small to correspond to the relatively narrow connection unit 30 located in the gap between adjacent teeth. By reasonably designing the first width d1 and the second width d2, the support unit 20 and the connection unit 30 can be supported by teeth below, and the first width d1 and the second width d2 can be personalized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0262] Specifically, the ratio of the maximum value of the first width d1 to the minimum value of the second width d2 is in the range of 0.15-0.5, and the minimum value of the second width d2 is not less than 0.5 mm.

[0263] It should be noted that since the width of the area in the gap between adjacent teeth that can provide support for the connecting unit 30 is relatively narrow, a narrower second width d2 is required to avoid no tooth support under the connecting unit 30. When the second width d2 is too narrow, the process difficulty will increase, and when the second width d2 is directly zero (that is, multiple support units 20 are distributed at intervals), the difficulty of demolding will be greatly increased.

[0264] While taking into account the difficulty of process and demoulding as well as making the second width d2 as narrow as possible, this specific embodiment controls the minimum value of the second width d2 to be no less than 0.5 mm. Preferably, the minimum value of the second width d2 is in the range of 1 mm to 4 mm.

[0265] In addition, the minimum value of the first width d1 is greater than or equal to the maximum value of the second width d2, which further ensures that the first width d1 is relatively large and the second width d2 is relatively small.

[0266] In this specific embodiment, the shell-shaped dental device 100 includes a plurality of support units 20 and a plurality of connecting units 30 connected one by one at intervals, that is, the occlusal surface of the orthodontic appliance 10 is provided with a support unit 20, a connecting unit 30, a support unit 20, a connecting unit 30, and so on connected in sequence.

[0267] Each connecting unit 30 has an inward-contracting tendency, and the degree of inward-contracting of the connecting unit 30 at each adjacent tooth gap is related to the width of the adjacent tooth gap.

[0268] It can be seen that the connecting unit 30 at the gap between adjacent teeth is also customized to correspond to the posterior teeth of different patients or different posterior teeth of the same patient.

[0269] In general, the various parameters of this specific embodiment can be customized according to a single case. The parameters include the first width d1 of the support unit 20, the second width d2 of the connection unit 30, the relationship between the end point M and the tip R of each protrusion, the peak section and the trough section in the first outer peripheral line L1 and the second outer peripheral line L2, the connection relationship between the first outer peripheral line L1 and the second outer peripheral line L2, the gap between the first outer peripheral line L1 and the separating line L, etc. In this way, the support unit 20 and the connection unit 30 can be more matched with the posterior teeth, and each part of the support unit 20 and the connection unit 30 can be supported by teeth underneath.

[0270] To sum up, a part of the support unit 20 of the second embodiment (the part corresponding to the first part L12) is set corresponding to the first support surface A111, and the other part (the part corresponding to the second part L12) is set corresponding to the second support surface A112. The advantage of such a setting is that the first support surface A111 can provide stable support for the support unit 20, thereby maintaining a stable occlusal pressure. The support unit 20 extends to the second support surface A112 to increase the contact area with the opposing jaw occlusal surface, thereby achieving the purpose of stable occlusion.

[0271] 20 and 21 , an embodiment of the present application further provides a shell-shaped dental instrument assembly 300 , comprising the shell-shaped dental instrument 100 and the opposing shell-shaped dental instrument 200 as described above.

[0272] One of the shell-shaped dental appliance 100 and the opposing shell-shaped dental appliance 200 is disposed corresponding to the maxillary teeth, and the other is disposed corresponding to the mandibular teeth. The shell-shaped dental appliance 100 may be the shell-shaped dental appliance 100 as shown in the first and second embodiments above.

[0273] 20 , in one example, a mandibular shell-shaped dental device 200 includes a mandibular appliance 201 and a guide portion 203 located on an occlusal surface 202 of the mandibular appliance 201. When in an occlusal state, the guide portion 203 and the support unit 20 (or the integral structure formed by the support unit 20 and the connecting unit 30) cooperate with each other in the mesiodistal direction to achieve horizontal movement of the maxillary teeth or the mandibular teeth.

[0274] In Figure 20, taking the shell-shaped dental instrument 200 corresponding to the mandibular teeth and the opposing shell-shaped dental instrument 200 corresponding to the maxillary teeth as an example, the shell-shaped dental instrument 100 includes an overall structure formed by a supporting unit 20 and a connecting unit 30, and the opposing shell-shaped dental instrument 200 includes a guide portion 203. When in an occlusal state, the mesial end of the overall structure formed by the supporting unit 20 and the connecting unit 30 abuts against the distal end of the guide portion 203 to achieve horizontal movement of the mandibular teeth, that is, the retraction of the mandibular teeth is achieved at this time.

[0275] Of course, in other examples, the overall structure formed by the support unit 20 and the connecting unit 30 and the guide portion 203 may be matched in other forms, for example, the distal end of the overall structure formed by the support unit 20 and the connecting unit 30 and the proximal end of the guide portion 203 abut against each other to achieve the advancement of the mandibular teeth.

[0276] It is understandable that in order to improve the stability of the overall structure formed by the support unit 20 and the connection unit 30 and the guide portion 203, a friction structure or a concave-convex matching structure may be formed at the contact point between the two.

[0277] 21 , in another example, the mandibular shell-shaped dental device 200 includes a mandibular appliance 201 having a cavity for accommodating teeth. When the upper and lower jaws are in an occlusal state, the support unit 20 abuts against the mandibular occlusal surface of the mandibular appliance 201 .

[0278] The "antipmandibular occlusal surface" can be the occlusal surface 2011 of the antipmandibular appliance 201 or the occlusal surface of the antipmandibular support unit located on the occlusal surface of the antipmandibular appliance 201. Here, the occlusal surface 2011 of the antipmandibular appliance 201 is taken as an example.

[0279] The support unit 20 of this embodiment extends to the second support surface A112, which can effectively increase the contact area between the support unit 20 and the occlusal surface of the opposing jaw, thereby achieving the purpose of stable occlusion.

[0280] 22 to 24 , an embodiment of the present application provides a dental orthodontic appliance 100 .

[0281] The dental orthodontic appliance 100 includes an appliance body 10 and a jaw pad 20 located on an occlusal surface A1 of the appliance body 10 . The jaw pad 20 is disposed corresponding to a plurality of posterior teeth in the posterior tooth area.

[0282] The occlusal surface A1 includes a first occlusal surface A11 and a second occlusal surface A12 connected to each other. The first occlusal surface A11 is arranged corresponding to the occlusal surface of the teeth, and the second occlusal surface A12 is arranged corresponding to the gap between adjacent teeth.

[0283] Here, the "occlusal surface of the teeth" refers to the lower end surface of each maxillary tooth or the upper end surface of each mandibular tooth, and the "interproximal space" refers to the area between two adjacent teeth, which connects the occlusal surfaces of the two adjacent teeth.

[0284] In this embodiment, the jaw pad 20 located on the second occlusal surface A12 has an inward-retracting tendency.

[0285] Here, the jaw pad 20 includes a first portion 21 located on the first occlusal surface A11 and a second portion 22 located on the second occlusal surface A12. The first portion 21 is connected to the second portion 22, and the second portion 22 tends to be retracted compared to the first portion 21, that is, the second portion 22 forms a narrower necking section.

[0286] Here, in the direction from the buccal surface of the tooth to the lingual surface, the width of the tooth occlusal surface is greater than the width of the adjacent tooth gap. When the jaw pad 20 is subjected to the occlusal pressure applied by the jaw, the tooth occlusal surface provides support for the first part 21 located on the first occlusal surface A11, and the adjacent tooth gap provides support for the second part 22 located on the second occlusal surface A12. That is to say, the relatively wide tooth occlusal surface supports the relatively wide first part 21, and the relatively narrow adjacent tooth gap supports the relatively narrow second part 22. At this time, the area ratio of the jaw pad 20 supported by the teeth is increased. Furthermore, the first part 21 and the second part 22 of the jaw pad 20 can be supported by teeth (tooth occlusal surface or adjacent tooth gap) below, thereby avoiding deformation and collapse of the jaw pad 20 due to lack of tooth support below.

[0287] In this embodiment, the jaw pad 20 includes an outer contour line L formed at the junction area with the occlusal surface A1, an end face 23 away from the occlusal surface A1, and a side face 24 connecting the outer periphery of the end face 23 and the outer contour line L. The end face 23 and the side face 24 are arranged to form a cavity S1. The orthodontic appliance body 10 has a cavity S2 for accommodating teeth, and the cavity S1 is connected to the cavity S2.

[0288] Here, the appliance body 10 can be an invisible braces made of polymer material, the cavity S2 has a geometric shape for repositioning the teeth from the current layout to the next layout, the jaw pad 20 can be integrally formed with the appliance body 10, and the cavity S1 formed by the jaw pad 20 is interconnected with the cavity S2 formed by the appliance body 10.

[0289] The jaw pad 20 forming the cavity S1 is a hollow structure. Combined with the above description, since the jaw pad 20 located on the second occlusal surface A12 of this embodiment has an inward shrinking tendency, the strength of the hollow structure can be enhanced to prevent the hollow structure from being bitten and collapsed.

[0290] Of course, the dental orthodontic appliance 100 may further include a filling portion located in the cavity S1 , and the filling portion may further enhance the strength of the jaw pad 20 .

[0291] In this embodiment, referring to FIG. 24 , the shape of the end surface 23 of the jaw pad 20 matches the shape of the opposing jaw occlusal surface.

[0292] Here, the "opposing mandibular occlusal surface" can be the occlusal surface of the opposing teeth, the occlusal surface of the opposing orthodontic appliance body or the occlusal surface of the opposing jaw pad, and "the shape of the end face 23 of the jaw pad 20 matches the shape of the opposing mandibular occlusal surface" means that when the upper and lower jaws are occluded, the end face 23 of the jaw pad 20 and the opposing mandibular occlusal surface can be matched together. In this way, the accuracy of the occlusal position and the stability of the occlusion can be improved, thereby improving the jaw position correction effect.

[0293] 24 , this embodiment takes the case where the end surface 23 of the jaw pad 20 is irregular in shape as an example, that is, the end surface 23 is a non-planar structure.

[0294] In addition, since the outer contour line L is located on the occlusal surface A1 of the orthodontic appliance body 10, the multiple points forming the outer contour line L are basically not on the same plane. Therefore, the plane enclosed by the outer contour line L is represented here as the "reference plane enclosed by multiple points on the outer contour line L", and the reference plane passing through as many points on the outer contour line L as possible is used as the basis.

[0295] In one embodiment, the side surface 24 is perpendicular to the reference plane, that is, the jaw pad 20 can be regarded as being arranged roughly perpendicular to the occlusal surface A1 of the appliance body 10 (combined with the schematic diagram of Figure 26), and the contour line of the positive projection of the jaw pad 20 on the occlusal surface A1 is the outer contour line L.

[0296] In another embodiment, at least a portion of the side surface 24 forms an acute angle with the reference plane, that is, the jaw pad 20 is tilted relative to the occlusal surface A1.

[0297] Specifically, an acute angle is formed between the side surface 24 located at the distal end of the jaw pad 20 and the reference plane, that is, the side surface 24 is tilted toward the center of the jaw pad 20 as a whole. At this time, when the dental orthodontic appliance 100 with the jaw pad 20 is obtained by demolding, the tilted distal side surface 24 can effectively reduce the difficulty of demolding.

[0298] Alternatively, the side surfaces 24 of the jaw pad 20 close to the buccal surface A2 and the lingual surface A3 of the appliance body 10 respectively form acute angles with the reference plane, which can also reduce the difficulty of demolding.

[0299] It can be understood that when an acute angle is formed between the side surface 24 and the reference plane, the positive projection size of the edge of the side surface 24 away from the outer contour line L on the occlusal surface A1 is smaller than the outer contour line L, that is, the entire jaw pad 20 has a structure that is narrow at the top and wide at the bottom, which can effectively improve the strength of the jaw pad 20.

[0300] In this embodiment, referring to FIG. 25 to FIG. 27 , the outer contour line L formed by the boundary area between the jaw pad 20 and the occlusal surface A1 is located on the occlusal surface A1 , and the outer contour line L simultaneously extends to cover a portion of the first occlusal surface A11 and a portion of the second occlusal surface A12 .

[0301] In the direction from the buccal surface A2 to the lingual surface A3 of the appliance body 10 , the outer contour line L has a width, and the width tends to decrease when the first occlusal surface A11 transitions to the second occlusal surface A12 .

[0302] Here, “the first occlusal surface A11 transitions to the second occlusal surface A12” refers to the area of ​​the first occlusal surface A11 close to the second occlusal surface A12 extending to the second occlusal surface A12, rather than the entire first occlusal surface A11 extending to the second occlusal surface A11.

[0303] That is to say, the outer contour line L located on the second occlusal surface A12 is narrower, and the jaw pad 20 corresponding to this part of the outer contour line L is located in the second part 22 of the second occlusal surface A12. In other words, the narrower outer contour line L corresponds to the jaw pad 20 with an inward-retracting tendency.

[0304] In addition, the outer contour line L is formed by multiple curved lines, and there is a smooth transition between adjacent curves.

[0305] Correspondingly, the side surface 24 is formed by a plurality of curved surfaces, and there is a smooth transition between adjacent curved surfaces.

[0306] That is to say, the side surface 24 does not include a plane, or in other words, there is no right-angle, acute-angle or obtuse-angle transition on the side surface 24. In this way, the occlusal pressure on the entire jaw pad 20 can be evenly distributed, avoiding the presence of stress concentration areas on the jaw pad 20, thereby further enhancing the strength of the jaw pad 20. Moreover, when the dental orthodontic appliance 100 with the jaw pad 20 is obtained by demolding, the arc transition can effectively reduce the difficulty of demolding.

[0307] In this embodiment, the outer contour line L includes a first outer contour line L1 corresponding to the first occlusal surface A11 and a second outer contour line L2 corresponding to the second occlusal surface A12. In the direction from the buccal surface A2 of the orthodontic appliance body 10 toward the lingual surface A3, the width of the first outer contour line L1 is the first width d1, and the width of the second outer contour line L2 is the second width d2.

[0308] Here, the first width d1 and the second width d2 are both variable widths. The first width d1 is relatively large to correspond to the relatively wide first part 21 located on the first occlusal surface A11, and the second width d2 is relatively small to correspond to the relatively narrow second part 22 located on the second occlusal surface A12. By reasonably designing the first width d1 and the second width d2, the first part 21 and the second part 22 of the jaw pad 20 can be supported by teeth below, and the first width d1 and the second width d2 can be personalized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0309] Specifically, the ratio of the maximum value of the first width d1 to the minimum value of the second width d2 is in the range of 0.15-0.5, and the minimum value of the second width d2 is not less than 0.5 mm.

[0310] It should be noted that since the width of the area in the gap between adjacent teeth that can provide support for the second part 22 of the jaw pad 20 is relatively narrow, a narrower second width d2 is required to avoid no tooth support under the second part 22. When the second width d2 is too narrow, the process difficulty will increase, and when the second width d2 is directly zero (that is, multiple first parts 21 are distributed at intervals), the difficulty of demolding will be greatly increased.

[0311] While taking into account the difficulty of process and demoulding as well as making the second width d2 as narrow as possible, this embodiment controls the minimum value of the second width d2 to be no less than 0.5 mm. Preferably, the minimum value of the second width d2 is in the range of 1 mm to 4 mm.

[0312] In addition, the minimum value of the first width d1 is greater than or equal to the maximum value of the second width d2, which further ensures that the first width d1 is relatively large and the second width d2 is relatively small.

[0313] In this embodiment, the first outer contour line L1 corresponding to a tooth includes a connected first peak segment, a first trough segment, and a second peak segment, or the first outer contour line L1 corresponding to a tooth includes a connected first trough segment, a first peak segment, and a second trough segment.

[0314] For example, the distal part of the first outer contour line L1 of the posterior tooth No. 17 in Figure 23 includes a connected first peak segment, a first trough segment and a second peak segment, and the part of the first outer contour line L1 of the posterior tooth No. 15 close to the lingual surface A3 includes a connected first trough segment, a first peak segment and a second trough segment.

[0315] That is, the first outer contour line L1 may include connected peak segments and trough segments, that is, a protruding structure may be formed at the first outer contour line L1 , and the protruding structure may further enhance the strength of the corresponding jaw pad 20 .

[0316] 25 , the second outer contour line L2 is a trough section, and the second outer contour line L2 includes a first trough section close to the lingual surface A3 and a second trough section close to the buccal surface A2. The corresponding arrangement of the first trough section and the second trough section can make the second width of the second outer contour line L2 show a trend of first decreasing and then increasing in the mesiodistal direction.

[0317] In this embodiment, in combination with Figures 25 to 27, the first occlusal surface A11 includes a first area A111 located in the middle and a second area A112 arranged around the first area A111. The dividing line L3 between the first area A111 and the second area A112 passes through multiple tips R, and the multiple tips R respectively correspond to multiple cusps of the posterior teeth.

[0318] Here, the first area A111 is the central area of ​​the first occlusal surface A11, and the first area A111 corresponds to the central recessed portion in FIG26 . The second area A112 is the peripheral area of ​​the first occlusal surface A11, and the second area A112 corresponds to the peripheral inclined portion in FIG26 (that is, the second area A112 connects the buccal surface A2, the lingual surface A3 and the non-active area A12). If the jaw pad 20 is arranged corresponding to the first area A111, the entire first area A111 can play a stable supporting role, which can improve the stability of the jaw pad 20 under occlusal pressure. If the jaw pad 20 is arranged corresponding to the second area A112, it is the inclined surface that bears the occlusal pressure, and the supporting effect of the inclined surface is unstable and prone to lateral sliding and collapse.

[0319] Here, in conjunction with Figure 27, the junction area between the jaw pad 20 and the first occlusal surface A11 forms a first outer contour line L1, and the first outer contour line L1 includes an inner line L11 located in the first area A111 and an outer line L12 located in the second area A112. The outer line L12 is connected to the inner line L11 only in the mesiodistal direction of the orthodontic appliance body 10.

[0320] That is to say, on the first occlusal surface A11, most of the first part 21 of the jaw pad 20 is set corresponding to the first area A111, and only a small part is set corresponding to the second area A112 to connect the second part 22 of the jaw pad 20 at the second occlusal surface A12. The advantage of such a setting is that most of the jaw pad 20 corresponding to the first occlusal surface A11 is supported by the first area A111, and the first area A111 can provide stable support for the jaw pad 20, thereby maintaining a stable occlusal pressure.

[0321] In addition, the inner line L11 includes a first inner line L111 close to the buccal surface A2 of the orthodontic appliance body 10 and a second inner line L112 close to the lingual surface A3 of the orthodontic appliance body 10. There is a first gap P1 between the first inner line L111 and the corresponding dividing line L3, and there is a second gap P2 between the second inner line L112 and the corresponding dividing line L3.

[0322] In other words, in the direction from the buccal surface A2 of the appliance body 10 toward the lingual surface A3, there is a gap between the first outer contour line L1 and the boundary line L3 to ensure that the corresponding jaw pad 20 is located in the first area A111.

[0323] Specifically, the first inner line L111 includes a peak segment, and in the direction from the buccal surface A2 toward the lingual surface A3 of the appliance body 10 , a first gap P1 between the peak segment and the boundary line L3 is not less than 1 mm.

[0324] The second inner line L112 includes a peak section, and in the direction from the buccal surface A2 to the lingual surface A3 of the appliance body 10 , a second gap P2 between the peak section and the boundary line L3 is not less than 1 mm.

[0325] In the proximal-distal direction, in order to connect the second outer contour line L2, the first outer contour line L1 extends out of the dividing line L3 to form an outer line L12 located in the second area A112. The outer line L12 actually connects the inner line L11 and the second outer contour line L2. The second outer contour line L2 and the outer lines L12 at both ends form a trough section M.

[0326] Here, there is a smooth transition between the outer line L12 and the second outer contour line L2. Taking the outer line L12 and the second outer contour line L2 close to the lingual surface A3 of the orthodontic appliance body 10 as an example, the second outer contour line L2 is connected to the outer lines L12 at both ends to form a curve, which bends toward the buccal surface A2 to form a trough section M.

[0327] At this time, when transitioning from one of the second areas A112 to another adjacent second area A112 via the second occlusal surface A12, the width of the outer contour line L tends to first decrease and then increase in the mesiodistal direction, thereby obtaining a second outer contour line L2 with a smaller width and improving the smoothness of the transition between the first outer contour line L1 and the second outer contour line L2.

[0328] In this embodiment, continuing with Figures 25 to 27, taking the first inner line L11 as an example, the first inner line L11 includes a peak segment N, and the endpoints M1 of two adjacent trough segments M located on the same side (that is, two trough segments M both located close to the cheek surface A2) form a baseline M2, and the maximum distance d3 between the peak segment N and the baseline M2 on the same side is not less than 0.5 mm.

[0329] Here, the two trough segments M are roughly flush, the baseline M2 is roughly the tangent of the two trough segments M, and the maximum distance d3 is the distance that the peak segment N protrudes from the baseline M2. By controlling the maximum distance d3, the first width d1 of the first outer contour line L1 and the second width d2 of the second outer contour line L2 can actually be further controlled. The maximum distance d3 can be customized for the posterior teeth of different patients or different posterior teeth of the same patient, so that there are teeth to provide support under the jaw pad 20.

[0330] Preferably, the maximum distance d3 is in the range of 1 mm to 3 mm.

[0331] In this embodiment, the endpoint of each peak segment N is set adjacent to the corresponding tip R, that is, the endpoint of the peak segment N and the tip R are matched with each other in position. For example, corresponding to a certain posterior tooth, the endpoint of each peak segment N is closer to the center of the posterior tooth than the corresponding tip R, and the distance between the endpoint of each peak segment N and the tip R remains basically consistent. At this time, corresponding to the posterior teeth of different patients or different posterior teeth of the same patient, the peak segment N is personalized, so that the jaw pad 20 is more matched with the corresponding posterior teeth.

[0332] In addition, the jaw pad 20 includes multiple first occlusal surfaces A11 and multiple second occlusal surfaces A12 connected one by one at intervals, that is, the jaw pad 20 includes a first occlusal surface A11, a second occlusal surface A12, a first occlusal surface A12, a second occlusal surface A12, and so on connected in sequence.

[0333] The jaw pad 20 at each second occlusal surface A12 has a tendency to retract, and the degree of retraction of the jaw pad 20 at each second occlusal surface A12 is related to the width of the adjacent tooth gap corresponding to the second occlusal surface A12.

[0334] It can be seen that the jaw pad 20 at the second occlusal surface A12 is also customized to correspond to the posterior teeth of different patients or different posterior teeth of the same patient.

[0335] In general, the various parameters of the jaw pad 20 of this embodiment can be customized according to a single case. The parameters include the first width d1 of the first part 21 of the jaw pad 20, the second width d2 of the second part 22, the maximum distance d3 between the peak segment N and the reference line M2, the relationship between the end point of each peak segment N and the tip R, the first gap P1, the second gap P2, the peak segment and the trough segment in the first outer contour line L1 and the second outer contour line L2, the connection relationship between the first outer contour line L1 and the second outer contour line L2, etc. In this way, the jaw pad 20 can be more matched with the posterior teeth, and each part of the jaw pad 20 can be supported by teeth underneath.

[0336] 28 , an embodiment of the present application further provides a dental orthodontic appliance assembly 300 , comprising the dental orthodontic appliance 100 and the opposing dental orthodontic appliance 200 as described above.

[0337] One of the orthodontic appliance 100 and the opposing orthodontic appliance 200 is disposed corresponding to the maxillary teeth, and the other one is disposed corresponding to the mandibular teeth.

[0338] The mandibular orthodontic appliance 200 includes a mandibular appliance body 201 and a guide portion 203 located on the occlusal surface 202 of the mandibular appliance body 201. When in the occlusal state, the guide portion 203 cooperates with the jaw pad 20 in the mesiodistal direction to achieve horizontal movement of the maxillary teeth or mandibular teeth.

[0339] In Figure 28, taking the case where the dental orthodontic appliance 200 is set corresponding to the mandibular teeth and the opposing dental orthodontic appliance 200 is set corresponding to the maxillary teeth as an example, the dental orthodontic appliance 100 includes a jaw pad 20, and the opposing dental orthodontic appliance 200 includes a guide portion 203. When in the occluded state, the proximal end of the jaw pad 20 and the distal end of the guide portion 203 abut against each other to achieve horizontal movement of the mandibular teeth, that is, the retraction of the mandibular teeth is achieved at this time.

[0340] Of course, in other embodiments, the jaw pad 20 and the guide portion 203 may be matched in other forms, for example, the distal end of the jaw pad 20 and the proximal end of the guide portion 203 may abut against each other to achieve the advancement of the mandibular teeth.

[0341] It is understandable that in order to improve the stability of the cooperation between the jaw pad 20 and the guide portion 203, a friction structure or a concave-convex cooperation structure may be formed at the abutment between the two.

[0342] In summary, in this embodiment, the jaw pad 20 located on the second occlusal surface A12 is designed as an inward-retracted structure, which can increase the proportion of the jaw pad area supported by the teeth. Furthermore, the teeth can be provided to support the bottom of each part of the jaw pad 20, thereby avoiding deformation and collapse of the jaw pad 20 due to lack of tooth support below. The smooth transition of the entire side surface 24 of the jaw pad 20 can further improve the strength of the entire jaw pad 20.

[0343] In addition, most of the jaw pad 20 for bearing the occlusal pressure is located in the first area A111 of the first occlusal surface A11, which can improve the stability of the jaw pad 20 under the occlusal pressure.

[0344] In conjunction with FIG. 29 to FIG. 31 , an embodiment of the present application provides a design method for a digital jaw pad 10 , the design method comprising the steps of:

[0345] Step S1: Acquire the target digital dental jaw 100.

[0346] Optionally, the target digital jaw 100 may be a three-dimensional digital jaw model. The target digital jaw 100 may be the patient's upper jaw or lower jaw. In addition, the target digital jaw 100 may be a complete jaw or a partial jaw.

[0347] There are many ways to obtain the target digital jaw 100. For example, the target digital jaw 100 can be obtained and received from the outside, or called from internal storage; or the target digital jaw 100 can be obtained based on certain data processing.

[0348] Step S2: According to the outer contour 11 of the target end face A1 of the target digital jaw 100, determine the reference line L of the digital jaw pad 10 on the target end face A1. The target end face A1 is the tooth end face away from the gum in the target digital jaw 100. The reference line L is used to generate the digital jaw pad 10.

[0349] Optionally, the tooth end surface away from the gum in the target digital jaw 100 may be the occlusal surface of the target digital jaw 100 , and the target end surface A1 is the surface sandwiched between the buccal surface A2 and the lingual surface A3 .

[0350] The "outer contour 11" may be the contour corresponding to the outermost edge area of ​​the target end surface A1. For example, the outer contour 11 includes the boundary line between the target end surface A1 and the buccal surface A2, and the boundary line between the target end surface A1 and the lingual surface A3.

[0351] The outer contour 11 is the contour line of the target end surface A1.

[0352] Optionally, the outer contour 11 may not completely match every tooth. For example, the outer contour 11 does not extend to the adjacent tooth gap N but completely matches the mesial and distal end surfaces of the teeth. In other words, the outer contour 11 corresponds to the outer contour of the occlusal surface of the final formed orthodontic appliance.

[0353] Optionally, the reference line L can be a physical line or a virtual line. The physical line is defined as a line that is directly displayed on the target end face A1 during the design process. At this time, the reference line L can be a continuous line or a discontinuous line generated on the target end face A1. The virtual line is defined as a line that is not directly displayed on the target end face A1 during the design process. For example, the digital jaw pad 10 can be generated directly based on the coordinate information corresponding to the virtual line.

[0354] Optionally, during the design process, one or more of the target end face A1 , the outer contour 11 , and the reference line L of the target digital jaw 100 may be displayed, but the present invention is not limited thereto.

[0355] For example, the target end face A1 can be displayed on the display interface. In actual operation, the target end face A1 can be displayed by rotating the target digital jaw 100, or by clicking a specific button, etc. The target digital jaw 100 can be displayed in a single jaw, or from a side perspective, or from an open or closed perspective, etc.

[0356] Optionally, taking the target digital jaw 100 as the maxilla as an example, the target end face A1 of the maxilla is larger, and a larger digital jaw pad 10 can be generated, thereby improving the occlusal stability of the subsequently formed jaw pad.

[0357] This embodiment determines the reference line L based on the outer contour 11, and then generates the digital jaw pad 10 based on the reference line L. That is to say, the digital jaw pad 10 of this embodiment is generated based on the outer contour 11 of the target end face A1. For different patients with different outer contours 11, this embodiment can determine different reference lines L and generate different digital jaw pads 10. That is, this embodiment can personalize the design of the digital jaw pad 10 according to the outer contour 11 of the target end face A1 of each patient, which can greatly improve the patient experience.

[0358] Optionally, the reference line L of the target end face A1 is determined according to at least one of the following: the shape of the outer contour 11 of the target end face A1 and the tooth supporting capacity of the target end face A1 , which is described below with examples of methods 1 to 4.

[0359] Method 1: In combination with Figure 32, the method for determining the reference line L of Method 1 of the present application is illustrated, including: offsetting the outer contour 11 in the direction close to the reference line to form two inner contour lines L1 close to the buccal surface A2 and the lingual surface A3 respectively, the reference line extends in the mesiodistal direction, and the reference line passes through the center of the target end surface A1 or the tooth tip R of the target end surface A1, and connects the two inner contour lines L1 to form a closed reference line L.

[0360] Optionally, taking the center line A11 passing through the center of the target end surface A1 as an example, the first approach is to offset the outer contour 11 toward the middle area surrounded by the outer contour 11 .

[0361] "Two inner contour lines L1 close to the buccal surface A2 and the lingual surface A3 respectively" may refer to the first inner contour line close to the buccal surface A2 and the second inner contour line close to the lingual surface A3, and the first inner contour line and the second inner contour line are connected to form the reference line L; or it may refer to the first inner contour line close to the buccal surface A2 and the lingual surface A3 on the left side of the jaw and the second inner contour line close to the buccal surface A2 and the lingual surface A3 on the right side of the jaw, and the first inner contour line is connected to form the reference line L located on the left side of the jaw, and the second inner contour line is connected to form the reference line L located on the right side of the jaw.

[0362] Optionally, the center line A11 is substantially the center line of the target end surface A1 in the proximal-distal direction, the two inner contour lines L1 are located inside the outer contour 11 , and there is a gap between the inner contour lines L1 and the corresponding outer contour 11 areas.

[0363] Method 1 forms a reference line L by offsetting the outer contour 11 toward the center line A11. The reference line L is located on the target end face A1 and does not extend to the outer contour 11. That is, the generated digital jaw pad 10 is roughly located in the middle of the target end face A1. Most of the subsequently formed jaw pad is supported by the middle area of ​​the target end face A1, and the supporting effect is more stable, so as to ensure that the subsequently formed jaw pad can stably withstand the occlusal pressure.

[0364] Method 2: In conjunction with Figure 33, a method for determining the reference line L of Method 2 of the present application is illustrated, including: forming a reference area L2 located inside the outer contour 11 on the target end surface A1, and the periphery of the reference area L2 forms a closed reference line L.

[0365] The reference area L2 may be one or more areas with a certain area located inside the outer contour 11 .

[0366] The reference line L is formed by forming the reference area L2. Similarly, the reference line L is also located on the target end surface A1 and does not extend to the outer contour 11. In this way, it is ensured that the subsequently formed jaw pad can stably withstand the occlusal pressure.

[0367] Method 3: In conjunction with Figure 34, the method for determining the baseline L of Method 3 of the present application is illustrated, including: obtaining the tooth supporting capacity of the target end face A1; and determining the baseline L based on the tooth supporting capacity of at least a partial area of ​​the target end face A1.

[0368] Optionally, "tooth supporting capacity" refers to the ability of the teeth in the corresponding area to support the jaw pad when the subsequently formed braces with the jaw pad are worn on the patient's teeth. When there are teeth in the area, the tooth supporting capacity of the area is relatively strong. When there are no teeth in the area or the corresponding tooth area is small (for example, the area corresponds to the adjacent tooth gap N), the tooth supporting capacity of the area is relatively weak.

[0369] Method three can determine the reference line L based on the tooth support capacity of at least part of the area, so that when the subsequently formed orthodontic appliance with a jaw pad is worn on the patient's teeth, there are a sufficient proportion of teeth under the jaw pad to provide sufficient support for the jaw pad.

[0370] Optionally, a first method for determining the baseline L in the third approach includes:

[0371] The distance between the reference line L and the center line A11 is determined according to the tooth supporting capacity. The distance is the distance in the buccal-lingual direction and is proportional to the tooth supporting capacity.

[0372] Since the center line A11 is the midline of the target end face A1 in the mesiodistal direction, the closer the center line A11 is to the target end face A1, the larger the tooth area is and the greater the tooth supporting capacity is. Therefore, the distance between the reference line L and the center line A11 can be reasonably designed according to the tooth supporting capacity.

[0373] "The spacing is proportional to the tooth supporting capacity" may mean: when the tooth supporting capacity is greater than a preset value, the first spacing P1 is set between the baseline L and the center line A11 of the area; when the tooth supporting capacity is not greater than the preset value, the second spacing P2 is set between the baseline L and the center line A11 of the area; the first spacing P1 is greater than the second spacing P2, wherein the first spacing P1 and the second spacing P2 are spacings in the buccal-lingual direction, and the buccal-lingual direction is the direction from the buccal surface A2 to the lingual surface A3 or the opposite direction thereof.

[0374] For different areas of the target end surface A1 , the first spacing P1 and the second spacing P2 may both have varying values, and it is only necessary to ensure that the first spacing P1 is greater than the second spacing P2 .

[0375] Multiple areas on the target end surface A1 may be traversed to generate multiple first intervals P1 and second intervals P2, thereby forming a complete reference line L.

[0376] When the tooth support capacity is weak, it is necessary to set a smaller second spacing P2 to make the reference line L as close to the center line A11 as possible, which can increase the tooth ratio corresponding to the digital jaw pad 10 in this area. In this way, when the subsequently formed orthodontic appliance with a jaw pad is worn on the patient's teeth, a higher proportion of teeth will provide support under the jaw pad, avoiding deformation and collapse of the jaw pad due to lack of tooth support underneath.

[0377] By designing different first spacings P1 and second spacings P2, a concave-convex reference line L can be formed, and the reference line L is individually designed according to the tooth supporting capacity of each area of ​​the target end face A1 of each patient, which can improve the deformation resistance of different jaw pads corresponding to different patients.

[0378] Optionally, a second method for determining the baseline L in the third approach includes:

[0379] According to the tooth supporting capacity, multiple target points are selected on the target end surface A1, and the vertical distance between the target point and the center line A11 is proportional to the tooth supporting capacity; the multiple target points are fitted to form a reference line L.

[0380] The second determination method is different from the first determination method mentioned above in that: the second determination method selects the target point according to the tooth supporting capacity. For example, the first target point M1 and the second target point M2 are selected on the target end surface A1 according to different tooth supporting capacities. The first target point M1 corresponds to the area with stronger tooth supporting capacity, and the second target point M2 corresponds to the area with weaker tooth supporting capacity; "the vertical distance between the target point and the center line A11 is proportional to the tooth supporting capacity" may mean that the first target point M1 on the same side deviates from the center line A11 compared to the second target point M2.

[0381] When the tooth support capacity is weak, it is necessary to set a smaller vertical distance to make the target point as close to the center line A11 as possible, which can increase the tooth ratio corresponding to the digital jaw pad 10 in this area. In this way, when the subsequently formed orthodontic appliance with a jaw pad is worn on the patient's teeth, there is a higher proportion of teeth under the jaw pad to provide support, avoiding deformation and collapse of the jaw pad due to lack of tooth support underneath.

[0382] Method 4: In combination with Figures 35 to 39, the method for determining the baseline L of Method 4 of the present application is illustrated, including: selecting multiple target points M in the posterior tooth area of ​​at least the target end surface A1; fitting the multiple target points M to form the baseline L.

[0383] Optionally, the plurality of target points M are mainly located in the posterior teeth region. Of course, the target points M may also extend to part of the anterior teeth region.

[0384] Optionally, the selection of the target point M may take into account, for example, the tooth support capacity of different areas of the target end surface A1, the geometric shape of the target end surface A1, the occlusal relationship between the target end surface A1 and the opposing teeth, etc. By reasonably selecting the target point M, a baseline L that better matches the patient's needs can be obtained, which can greatly improve the patient experience.

[0385] Optionally, a first method for determining the baseline L in the fourth approach includes:

[0386] Selecting a plurality of first target points M1 in the posterior tooth region of the target end surface A1, wherein the first target points M1 are adjacent to the posterior tooth cusps;

[0387] and / or selecting a plurality of second target points M2 in the posterior tooth region of the target end surface A1, wherein the second target points M2 are located in at least one of the adjacent tooth gap N and the pit and fissure region N1;

[0388] A reference line L is formed by fitting a plurality of first target points M1 and / or second target points M2.

[0389] Optionally, the first target point M1 located on the same side deviates from the center line A11 compared to the second target point M2.

[0390] Optionally, the first method for determining the baseline L of method four may include three specific methods: only fitting multiple first target points M1 to form the baseline L, or only fitting multiple second target points M2 to form the baseline L, or simultaneously fitting multiple first target points M1 and multiple second target points M2 to form the baseline L.

[0391] Optionally, the first target point M1 is adjacent to the cusp R of the posterior tooth, and the second target point M2 is located in the adjacent tooth gap N. At this time, the area of ​​the baseline L corresponding to the adjacent tooth gap N tends to shrink inward, that is, the baseline L forms a necking section at the adjacent tooth gap N, which can enhance the strength of the subsequently formed hollow structure jaw pad and prevent the hollow structure jaw pad from being bitten down.

[0392] For the sake of convenience, the target end face A1 is divided into a connected first end face A12 and a second end face A13. The first end face A12 is a tooth surface area having a posterior tooth cusp R, and the second end face A13 corresponds to the adjacent tooth gap N. The area formed by the baseline L is divided into a connected first part L3 and a second part L4. The first part L3 includes a first target point M1 and is located on the first end face A12. The second part L4 includes a second target point M2 and is located on the second end face A13.

[0393] In the buccal and lingual directions, the width of the first end face A12 is greater than the width of the second end face A13, and the width of the first part L3 is greater than the width of the second part L4. When the subsequently formed orthodontic appliance with a jaw pad is worn on the patient's teeth and is subjected to occlusal pressure applied by the jaw, the first end face A12 provides support for the jaw pad corresponding to the first part L3, and the second end face A13 provides support for the jaw pad corresponding to the second part L4. That is to say, the relatively wide first end face A12 supports the relatively wide first part L3, and the relatively narrow second end face A13 supports the relatively narrow second part L4. At this time, the proportion of the jaw pad area supported by the teeth is increased. Furthermore, the proportion of teeth providing support below the first part L3 and the second part L4 can be larger, thereby avoiding deformation and collapse of the jaw pad due to lack of tooth support below (or insufficient proportion of teeth providing support).

[0394] Optionally, in other specific embodiments, the second target point M2 may be located in the pit and fissure area N1, or the second target point M2 may be located in the adjacent tooth gap N and the pit and fissure area N1.

[0395] The pit and fissure area N1 is defined as the area between multiple cusps R of the same posterior tooth. That is to say, the baseline L at this time corresponds to the pit and fissure area N1 and also shows an inward trend. This can further enhance the strength of the subsequently formed hollow structure jaw pad.

[0396] Optionally, in the buccal-lingual direction, the width of the first portion L3 is the first width d1, and the width of the second portion L4 is the second width d2.

[0397] Here, the first width d1 and the second width d2 are both variable widths. By reasonably designing the first width d1 and the second width d2, the first part L3 and the second part L4 of the subsequently formed jaw pad can be supported by teeth, and the first width d1 and the second width d2 can be personalized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0398] Specifically, the ratio of the maximum value of the first width d1 to the minimum value of the second width d2 is in the range of 0.15-0.5, and the minimum value of the second width d2 is not less than 0.5 mm.

[0399] It should be noted that since the width of the area in the adjacent tooth gap N that can provide support for the jaw pad corresponding to the second part L4 is relatively narrow, a narrower second width d2 is required to avoid no tooth support under the second part L4. When the second width d2 is too narrow, the process difficulty will increase, and when the second width d2 is directly zero, the difficulty of demolding will be greatly increased.

[0400] While taking into account the difficulty of process and demoulding as well as making the second width d2 as narrow as possible, this specific embodiment controls the minimum value of the second width d2 to be no less than 0.5 mm. Preferably, the minimum value of the second width d2 is in the range of 1 mm to 4 mm.

[0401] The minimum value of the first width d1 is greater than or equal to the maximum value of the second width d2, which further ensures that the first width d1 is relatively large and the second width d2 is relatively small.

[0402] Optionally, the first end surface A12 includes a first area A14 located in the middle and a second area A15 arranged around the first area A14, and a boundary line L6 between the first area A14 and the second area A15 passes through the plurality of tooth cusps R.

[0403] The first area A14 is the central area of ​​the first end face A12, and the first area A14 corresponds to the central recessed portion in FIG36 . The second area A15 is the peripheral area of ​​the first end face A12, and the second area A15 corresponds to the peripheral inclined portion in FIG36 (i.e., the second area A15 connects the buccal surface A2, the lingual surface A3 and the second end face A13). If the subsequently formed jaw pad is arranged corresponding to the first area A14, the entire first area A14 can play a stable supporting role, which can improve the stability of the jaw pad under occlusal pressure. If the subsequently formed jaw pad is arranged corresponding to the second area A15, the inclined surface bears the occlusal pressure, and the supporting effect of the inclined surface is unstable and prone to lateral sliding and collapse.

[0404] Most of the first part L3 corresponds to the first area A14, and only a small part corresponds to the second area A15 to connect to the second part L4. The advantage of such a setting is that most of the jaw pad corresponding to the first end face A12 is supported by the first area A14, and the first area A14 can provide stable support for the jaw pad, thereby maintaining a stable bite pressure.

[0405] The first target point M1 is set near the tooth tip R, and there is a first gap T1 between the baseline L passing through the first target point M1 and the corresponding dividing line L6. In other words, in the buccal and lingual directions, there is a gap between the baseline L and the dividing line L6 to ensure that the subsequently formed jaw pad is located in the first area A14.

[0406] The first target point M1 is set adjacent to the corresponding tooth cusp R, that is, the first target point M1 and the tooth cusp R are matched with each other in position. For example, corresponding to a certain posterior tooth, the first target point M1 is closer to the center of the posterior tooth than the corresponding tooth cusp R, and the distance between the first target point M1 and the tooth cusp R remains basically consistent. At this time, corresponding to the posterior teeth of different patients or different posterior teeth of the same patient, the first target point M1 is personalized, so that the subsequently formed jaw pad is more matched with the corresponding posterior teeth.

[0407] Optionally, the fitted baseline L includes two curves close to the buccal surface A2 and the lingual surface A3 respectively, the first target point M1 is the protruding point of one of the curves relative to the other curve, and the second target point M2 is the concave point of one of the curves relative to the other curve.

[0408] "Two curves close to the buccal surface A2 and the lingual surface A3 respectively" may refer to the first curve close to the buccal surface A2 and the second curve close to the lingual surface A3; or it may refer to the first curve close to the buccal surface A2 and the lingual surface A3 on the left side of the jaw and the curve close to the buccal surface A2 and the lingual surface A3 on the right side of the jaw.

[0409] Optionally, the line connecting two adjacent second target points M2 is L5, and the maximum distance d3 between the first target point M1 and the line L5 on the same side is not less than 0.5 mm.

[0410] The connecting line L5 is roughly the tangent of the two second target points M2, and the maximum distance d3 is the distance that the first target point M1 protrudes from the connecting line L5. By controlling the maximum distance d3, the first width d1 and the second width d2 can actually be further controlled. Moreover, the maximum distance d3 can be customized for the posterior teeth of different patients or different posterior teeth of the same patient, so that there are teeth to provide support underneath the subsequently formed jaw pad.

[0411] Preferably, the maximum distance d3 is in the range of 1 mm to 3 mm.

[0412] Optionally, a second method for determining the baseline L in the fourth method includes:

[0413] At least one third target point M3 is selected in the posterior tooth area of ​​the target end surface A1, the third target point M3 is located in the pit and fissure area N1, and the third target point M3 is used to form the reference line L; the third target point M3 is located at the mesial end of the reference line L and the third target point M3 is recessed toward the distal direction, and / or the third target point M3 is located at the distal end of the reference line L and the third target point M3 is recessed toward the mesial direction.

[0414] The setting of the third target point M3 can enhance the strength of the subsequently formed hollow structure jaw pad and reduce the difficulty of demoulding during the molding process of the orthodontic appliance with the jaw pad.

[0415] Optionally, there are multiple methods for determining the baseline L in combination with the first determination method and the second determination method of the baseline L in method four, for example, only fitting multiple first target points M1 to form the baseline L, or only fitting multiple second target points M2 to form the baseline L, or only fitting the third target point M3 to form the baseline L, or simultaneously fitting multiple first target points M1 and multiple second target points M2 to form the baseline L, or simultaneously fitting multiple first target points M1 and third target points M3 to form the baseline L, or simultaneously fitting multiple second target points M2 and third target points M3 to form the baseline L, or simultaneously fitting multiple first target points M1, multiple second target points M2, and third target points M3 to form the baseline L.

[0416] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0417] Determine the distance between two adjacent target points M in the near-far direction;

[0418] When the distance is greater than a preset value, other target points are inserted between two adjacent target points M.

[0419] Optionally, when the distance between two target points M is too large, which is not conducive to the fitting process, other target points may be inserted to assist the fitting.

[0420] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0421] The reference line L is adjusted so that at least a portion of the reference line L has a smooth transition.

[0422] Optionally, when the reference line L does not exist or has fewer right-angle, acute-angle or obtuse-angle transitions, the occlusal pressure on the entire jaw pad formed subsequently can be evenly distributed, avoiding stress concentration areas in the jaw pad, thereby further enhancing the strength of the jaw pad. Moreover, when the orthodontic appliance with the jaw pad is obtained by demolding, the arc transition can effectively reduce the difficulty of demolding.

[0423] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0424] The reference line L is stretched along the normal of the reference plane; or, the reference line L is stretched in a converged form along a direction having a first angle with the normal of the reference plane, the first angle range is 0-10°, wherein the reference plane is formed by a plurality of points on the reference line L.

[0425] Optionally, since the baseline L is located on the target end face A1, the multiple points forming the baseline L are basically not on the same plane. Therefore, the plane enclosed by the baseline L is represented here as "the baseline plane enclosed by multiple points on the baseline L", and the baseline plane passing through as many points on the baseline L as possible is taken as the standard.

[0426] The digital jaw pad 10 generated by stretching the reference line L includes a top surface A4 away from the target end surface A1 and a side surface A5 connecting the edge of the top surface A4 and the reference line L.

[0427] When the reference line L is stretched along the normal of the reference plane, the side surface A5 is perpendicular to the reference plane, that is, the digital jaw pad 10 can be regarded as being roughly perpendicular to the target end face A1, and the contour line of the positive projection of the digital jaw pad 10 on the target end face A1 is the reference line L.

[0428] When the reference line L is stretched in a converged form along a direction having a first angle with the normal of the reference plane, an acute angle is formed between at least part of the side surface A5 and the reference plane, that is, the digital jaw pad 10 is tilted relative to the target end face A1.

[0429] Optionally, an acute angle is formed between the side A5 and the reference plane, that is, the side A5 is tilted toward the center of the digital jaw pad 10 as a whole, and in the direction from the reference line L toward the top surface A4, the cross-sectional size of the digital jaw pad 10 tends to decrease, that is, the side A5 extends toward the top surface A4 in a concentrated form.

[0430] When the orthodontic appliance with the jaw pad is obtained by demolding, the inclined side A5 can effectively reduce the difficulty of demolding and effectively improve the strength of the jaw pad.

[0431] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0432] According to the opening height and the reference line L, the digital jaw pad 10 is determined so that the top surface A4 matches the occlusal surface morphology of the opposing digital jaw 101 .

[0433] Optionally, the target digital jaw 100 and the opposing digital jaw 101 having a specific occlusal relationship with the target digital jaw 100 can be obtained in advance, the opening height can be obtained according to the current occlusal relationship, and then the height of the digitized jaw pad 10 can be digitized according to the opening height so that the subsequently formed jaw pad can meet the occlusal relationship.

[0434] "The top surface A4 matches the occlusal surface of the opposing digital jaw 101" means that when the upper and lower jaws are occluded, the top surface A4 and the occlusal surface of the opposing digital jaw 101 can be matched together. In this way, the accuracy of the occlusal position and the stability of the occlusion can be improved, thereby improving the jaw correction effect. At this time, the top surface A4 is an irregular shape, that is, the top surface A4 is a non-planar structure.

[0435] The top surface A4 is formed, for example, by performing a Boolean operation on the occlusal surface of the digitalized jaw 101 to obtain the top surface.

[0436] Optionally, a Boolean subtraction operation is performed on the initial top surface obtained according to the reference line L and the occlusal surface of the opposing digital jaw 101 to obtain the final top surface A4, and the concave-convex shape of the top surface A4 matches the occlusal surface of the opposing digital jaw 101.

[0437] Alternatively, the top surface A4 is formed in the following manner: the top surface A4 is generated according to the distance information between the target end surface A1 and the occlusal surface of the opposing digital jaw 101 .

[0438] Optionally, after obtaining the target digital jaw 100 and the opposing digital jaw 101 having a specific occlusal relationship with the target digital jaw 100, the spacing information between the end surface surrounded by the reference line L and the occlusal surface of the opposing digital jaw 101 can be generated. The spacing information is, for example, the distance between a point on the end surface surrounded by the reference line L and the corresponding point on the occlusal surface of the opposing digital jaw 101 in the height direction of the digital jaw pad 10.

[0439] The top surface A4 can be directly generated based on the end surface enclosed by the reference line L and the spacing information. At this time, the concave and convex shape of the top surface A4 matches the occlusal surface of the opposing digital dental jaw 101.

[0440] It should be noted that in order to ensure the accuracy of occlusion, the thickness of the diaphragm of the subsequently formed orthodontic appliance needs to be considered. Therefore, the height of the digital jaw pad 10 needs to be increased by the distance of the diaphragm thickness, otherwise it will interfere with the occlusion. However, this is not limited to this, and the diaphragm thickness can also be ignored.

[0441] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0442] The digital jaw pad 10 is generated by adjusting the preset jaw pad based on the reference line L and the occlusal relationship between the target digital jaw 100 and the opposing digital jaw 101 .

[0443] Optionally, a preset jaw pad can be generated in advance on the target digital jaw 100. The preset jaw pad can be, for example, a standardized jaw pad, or a patient's historical jaw pad, or other possible preset jaw pads. After determining the baseline L and the occlusal relationship, the preset jaw pad can be manually or automatically adjusted according to the baseline L and the occlusal relationship to generate the required digital jaw pad 10.

[0444] Optionally, in some embodiments, the digital jaw pad 10 can be obtained by stretching the reference line L according to the occlusal relationship. In other embodiments, the digital jaw pad 10 can be obtained by adjusting the preset jaw pad according to the occlusal relationship and the reference line L, but is not limited thereto.

[0445] In the design method of the digital jaw pad 10 of the embodiment of the present application, the design method includes:

[0446] A plurality of digital jaw pads 10 corresponding to a plurality of correction steps are obtained, and the height of at least a portion of the digital jaw pad 10 tends to decrease as the correction steps progress.

[0447] Optionally, the subsequently formed jaw pad is used to maintain the vertical opening distance of the patient's upper and lower jaws during the treatment process. As the correction steps progress, the vertical opening distance will decrease and the required jaw pad height will also decrease. That is to say, as the correction steps progress, the height of at least part of the digital jaw pad 10 needs to be reduced to adapt to each correction step.

[0448] It should be noted that it is not limited to reducing the height of the digital jaw pad 10 for each progressive correction step. For example, a digital jaw pad 10 of the same height can be used for multiple consecutive correction steps.

[0449] Optionally, the clinician may select a digital jaw pad 10 of a specific height at a specific correction step, or obtain a specific height for a specific correction step based on big data or clinical experience.

[0450] In conjunction with FIG. 40 and FIG. 41 , an embodiment of the present application further provides a method for forming an orthodontic appliance, comprising:

[0451] According to the design method of the digital jaw pad 10 as described above, a target digital dental jaw 100 with the digital jaw pad 10 is obtained;

[0452] The appliance 200 with the jaw pad 20 is produced.

[0453] Optionally, a physical model may be formed first according to the target digital dental jaw 100 with the digital jaw pad 10, and then the orthodontic appliance 200 with the jaw pad 20 may be generated through a hot pressing process.

[0454] Alternatively, the appliance 200 with the jaw pad 20 may be generated by directly performing 3D printing based on the data of the target digital dental jaw 100 with the digital jaw pad 10 .

[0455] In conjunction with Figure 41, an embodiment of the present application further provides a brace 200, which is obtained according to the brace molding method as described above, and the brace 200 is provided with a jaw pad 20.

[0456] In conjunction with Figure 42, an embodiment of the present application also provides an orthodontic appliance assembly, including an orthodontic appliance 200 with a jaw pad 20 and an opposing jaw appliance 300 with a guide portion 30.

[0457] The orthodontic appliance 200 is disposed corresponding to one of the maxillary teeth or the mandibular teeth, and the opposing orthodontic appliance 300 is disposed corresponding to the other one.

[0458] When in the occlusal state, the guide portion 30 and the jaw pad 20 cooperate with each other in the mesiodistal direction to achieve horizontal movement of the maxillary teeth or the mandibular teeth.

[0459] In Figure 42, taking the example of the orthodontic appliance 200 being set corresponding to the mandibular teeth and the opposing orthodontic appliance 300 being set corresponding to the maxillary teeth, when in the occlusal state, the mesial end of the jaw pad 20 and the distal end of the guide part 30 abut against each other to achieve horizontal movement of the mandibular teeth, that is, the retraction of the mandibular teeth is achieved at this time.

[0460] In other embodiments, the jaw pad 20 and the guide portion 30 may be matched in other ways, for example, the distal end of the jaw pad 20 and the proximal end of the guide portion 30 may abut against each other to guide the mandibular teeth.

[0461] It is understandable that in order to improve the stability of the cooperation between the jaw pad 20 and the guide portion 30, a friction structure or a concave-convex cooperation structure may be formed at the abutment between the two.

[0462] In conjunction with FIG43 , an embodiment of the present application further provides a device 400 for designing a digital jaw pad 10 , comprising:

[0463] The first module 40 is used to obtain the target digital dental jaw 100;

[0464] The second module 41 is used to determine the reference line L of the digital jaw pad 10 on the target end face A1 according to the outer contour 11 of the target end face A1 of the target digital jaw 100. The target end face A1 is the end face of the tooth away from the gum in the target digital jaw 100. The reference line L is used to generate the digital jaw pad 10.

[0465] The purpose of the device 400 can also be configured based on any of the above-mentioned methods for designing the digital jaw pad 10. Specifically, based on the association relationship between the steps, the related steps can be implemented in the same or different modules.

[0466] The aforementioned apparatus or its modules and units may be implemented as computer chips or physical devices, or as products with corresponding functions. While the aforementioned apparatus is described as being divided into multiple modules, in other embodiments, the functions of the modules may be implemented in the same or multiple software or hardware components.

[0467] The present application provides a storage medium, which may be specifically a computer-readable storage medium. The storage medium may be provided in a computer and store an application program. In this case, the storage medium may be any available medium that the computer can access data, or may be a storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium such as a floppy disk, a hard disk, or a magnetic tape, or an optical medium such as a DVD (Digital Video Disc), or a semiconductor medium such as an SSD (Solid State Disk).

[0468] When the application is executed, the steps of any technical solution of the aforementioned method for designing the digital jaw pad 10 are implemented.

[0469] An embodiment of the present application provides an electronic device, which may be a computer, a mobile phone, a tablet computer, etc. The present application does not limit the specific type of the electronic device.

[0470] The electronic device includes at least one processor, at least one memory and a communication bus. The at least one processor and the at least one memory communicate with each other via the communication bus.

[0471] The communication bus may include any number of buses and bridge circuits. In some implementations, in addition to being used to connect the processor and the memory, the communication bus may also be used to connect peripheral devices or other peripheral circuits.

[0472] The memory is used to store application programs.

[0473] The processor is configured to implement any one of the technical solutions of the aforementioned method for designing the digital jaw pad 10 when executing the application program stored in the memory.

[0474] To sum up, this embodiment determines the baseline L based on the outer contour 11, and then generates the digital jaw pad 10 based on the baseline L. That is to say, the digital jaw pad 10 of this embodiment is generated based on the outer contour 11 of the target end face A1. For different patients with different outer contours 11, this embodiment can determine different baselines L and generate different digital jaw pads 10. That is, this embodiment can personalize the design of the digital jaw pad 10 according to the outer contour 11 of the target end face A1 of each patient, which can greatly improve the patient experience.

[0475] The area of ​​the reference line L corresponding to the adjacent tooth gap N shows an inward shrinkage trend, that is, the reference line L forms a necking section at the adjacent tooth gap N, which can enhance the strength of the subsequently formed hollow structure jaw pad and prevent the hollow structure jaw pad from being bitten down.

[0476] When the subsequently formed braces with a jaw pad are worn on the patient's teeth, a higher proportion of teeth provide support under the jaw pad, preventing the jaw pad from deforming and collapsing due to lack of tooth support underneath.

[0477] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0478] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of this application. They are not intended to limit the scope of protection of this application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of this application should be included in the scope of protection of this application.

Claims

1. A shell-shaped dental instrument, characterized in that: The invention comprises an orthodontic appliance having a cavity for accommodating teeth and a support unit, wherein the occlusal surface of the orthodontic appliance comprises a support surface corresponding to the occlusal surface of a certain posterior tooth, the support surface comprises a first support surface located in the middle and a second support surface arranged around the first support surface, a dividing line between the first support surface and the second support surface passes through a plurality of tips, the plurality of tips respectively correspond to a plurality of tooth tips of the posterior teeth, the support unit is located on the support surface, a first outer peripheral line is formed in a junction area between the support unit and the support surface, and at least a portion of the first outer peripheral line is located within the first support surface.

2. The shell-shaped dental instrument according to claim 1, characterized in that: The first outer peripheral line is entirely located within the first supporting surface.

3. The shell-shaped dental instrument according to claim 2, characterized in that: There is a gap between the first outer peripheral line and the separation line on the buccal or lingual side close to the orthodontic appliance.

4. The shell-shaped dental instrument according to claim 2, characterized in that: The first outer peripheral line is a ring-shaped closed structure, and the first outer peripheral line is spaced apart from the separation line.

5. The shell-shaped dental instrument according to claim 1, characterized in that: The first outer peripheral line includes a first portion located on the first support surface and a second portion located on the second support surface, the second portion is connected to the first portion, and the second portion is located on the buccal side or the lingual side of the first support surface.

6. The shell-shaped dental instrument according to claim 5, characterized in that: When the second part is located on the buccal side of the first support surface, the support unit is inclined toward the buccal side of the orthodontic device; when the second part is located on the lingual side of the first support surface, the support unit is inclined toward the lingual side of the orthodontic device.

7. The shell-shaped dental instrument according to claim 5, characterized in that: The second part is located on the buccal side of the first support surface, and there is a gap between the area of ​​the first part close to the lingual surface of the orthodontic device and the separation line, or the second part is located on the lingual side of the first support surface, and there is a gap between the area of ​​the first part close to the buccal surface of the orthodontic device and the separation line.

8. The shell-shaped dental instrument according to claim 5, characterized in that: The second portion is located on one of the buccal side and the lingual side of the first supporting surface.

9. The shell-shaped dental device according to claim 8, characterized in that: The first outer peripheral line is an annular closed structure, and there is a gap or overlap between the first part and the proximal end and the distal end of the separation line.

10. The shell-shaped dental instrument according to claim 8, characterized in that: The first outer peripheral line is an annular closed structure, and the second portion is also located on the proximal side and / or distal side of the first support surface.

11. The shell-shaped dental instrument according to any one of claims 1 to 10, characterized in that: The support unit is vertically arranged relative to the jaw plane, or the support unit is inclined relative to the jaw plane.

12. The shell-shaped dental instrument according to any one of claims 1 to 10, characterized in that: The first outer peripheral line includes multiple curves, and adjacent curves have smooth transitions.

13. The shell-shaped dental instrument according to any one of claims 1 to 10, characterized in that: The first outer peripheral line includes at least one recessed portion and at least one protruding portion, and when the first outer peripheral line includes a plurality of recessed portions or a plurality of protruding portions, the recessed portions and the protruding portions are connected one by one with intervals.

14. The shell-shaped dental device according to claim 13, characterized in that: The end points of the projections are disposed adjacent to the corresponding tips.

15. The shell-shaped dental instrument according to any one of claims 1 to 10, characterized in that: The shell-shaped dental appliance further comprises a connection unit located on the occlusal surface of the appliance, the connection unit connects the two support units, a junction area between the connection unit and the occlusal surface forms a second outer peripheral line, and the second outer peripheral line connects the first outer peripheral line.

16. The shell-shaped dental device according to claim 15, characterized in that: The first outer peripheral line extends in the mesiodistal direction of the orthodontic device and connects to the second outer peripheral line, and the first outer peripheral line and the second outer peripheral line have a smooth transition.

17. The shell-shaped dental device according to claim 15, characterized in that: The second outer peripheral line includes a lingual line close to the lingual surface of the orthodontic device and a buccal line close to the buccal surface of the orthodontic device, the lingual line is recessed toward the buccal line, and the buccal line is recessed toward the lingual line.

18. The shell-shaped dental device according to claim 15, characterized in that: The second outer peripheral line includes a first end connected to one of the first outer peripheral lines and a second end connected to another of the first outer peripheral lines. In the direction from the buccal surface to the lingual surface of the orthodontic device, the second outer peripheral line has a width, and the width tends to first decrease and then increase when transitioning from the first end to the second end.

19. The shell-shaped dental device according to claim 15, characterized in that: In the direction from the buccal surface of the orthodontic device to the lingual surface, the first outer peripheral line has a first width, the second outer peripheral line has a second width, the ratio of the maximum value of the first width to the minimum value of the second width is in the range of 0.15-0.5, the minimum value of the second width is not less than 0.5mm, or the minimum value of the second width is in the range of 1mm-4mm.

20. The shell-shaped dental device according to claim 15, characterized in that The shell-shaped dental instrument comprises a plurality of support units and a plurality of connection units which are connected one by one at intervals.

21. The shell-shaped dental device according to any one of claims 1 to 10, characterized in that: The support unit is surrounded to form a cavity, and the cavity is connected to the cavity body.

22. A shell-shaped dental instrument assembly, characterized in that: It comprises a shell-shaped dental appliance and an opposing shell-shaped dental appliance as described in any one of claims 1 to 21, wherein one of the shell-shaped dental appliance and the opposing shell-shaped dental appliance is arranged corresponding to the maxillary teeth, and the other one is arranged corresponding to the mandibular teeth.

23. The shell-shaped dental instrument assembly according to claim 22, characterized in that: The mandibular shell-shaped dental device includes a mandibular appliance and a guide portion located on the occlusal surface of the mandibular appliance. When in an occlusal state, the guide portion and the support unit cooperate with each other in the mesiodistal direction to achieve horizontal movement of maxillary teeth or mandibular teeth.

24. The shell-shaped dental instrument assembly according to claim 22, characterized in that: The mandibular shell-shaped dental device includes a mandibular appliance having a cavity for accommodating teeth. When the upper and lower jaws are in an occlusal state, the support unit abuts against the occlusal surface of the mandibular appliance, or the support unit abuts against the mandibular support unit located on the occlusal surface of the mandibular appliance.

25. A dental orthodontic appliance, characterized in that: It includes an appliance body and a jaw pad located on the occlusal surface of the appliance body, the occlusal surface includes a first occlusal surface and a second occlusal surface that are connected, the first occlusal surface is arranged corresponding to the occlusal surface of the teeth, the second occlusal surface is arranged corresponding to the gap between adjacent teeth, and the jaw pad located on the second occlusal surface tends to retract.

26. The dental orthodontic appliance according to claim 25, characterized in that: The junction area of ​​the jaw pad and the occlusal surface forms an outer contour line. In the direction from the buccal surface to the lingual surface of the orthodontic device body, the outer contour line has a width, and the width tends to decrease when the first occlusal surface transitions to the second occlusal surface.

27. The dental orthodontic appliance according to claim 26, characterized in that: The outer contour line is formed by enclosing a plurality of curves, and adjacent curves have a smooth transition.

28. The dental orthodontic appliance according to claim 26, characterized in that: The outer contour line includes a first outer contour line corresponding to the first occlusal surface and a second outer contour line corresponding to the second occlusal surface. The width of the first outer contour line is a first width, the width of the second outer contour line is a second width, and the ratio of the maximum value of the first width to the minimum value of the second width is in the range of 0.15-0.

5.

29. The dental orthodontic appliance according to claim 28, characterized in that: The minimum value of the second width is not less than 0.5 mm, or the minimum value of the second width is in the range of 1 mm to 4 mm, and the minimum value of the first width is greater than or equal to the maximum value of the second width.

30. The dental orthodontic appliance according to claim 26, characterized in that: The outer contour line includes a first outer contour line corresponding to the first occlusal surface, and the first outer contour line corresponding to a tooth includes a connected first peak segment, a first trough segment and a second peak segment, or the first outer contour line corresponding to a tooth includes a connected first trough segment, a first peak segment and a second trough segment.

31. The dental orthodontic appliance according to claim 26, characterized in that: The outer contour line includes a second outer contour line corresponding to the second occlusal surface, the second outer contour line is a trough segment, and the second outer contour line includes a first trough segment close to the lingual surface and a second trough segment close to the buccal surface.

32. The dental orthodontic appliance according to claim 25, characterized in that: The jaw pad is arranged corresponding to multiple posterior teeth, the first occlusal surface includes a first area located in the middle and a second area arranged around the first area, the boundary line between the first area and the second area passes through multiple tips, and the multiple tips correspond to multiple tooth cusps of the posterior teeth respectively. The junction area between the jaw pad and the first occlusal surface forms a first outer contour line, the first outer contour line includes an inner line located in the first area and an outer line located in the second area, and the outer line is connected to the inner line only in the mesiodistal direction of the orthodontic device body.

33. The dental orthodontic appliance according to claim 32, characterized in that: The junction area between the jaw pad and the second occlusal surface forms a second outer contour line, the outer line connects the inner line and the second outer contour line, and the second outer contour line and the outer lines at both ends form a trough section.

34. The dental orthodontic appliance according to claim 33, characterized in that: The inner line includes a peak segment, and the endpoints of two adjacent trough segments on the same side form a reference line. The maximum distance between the peak segment and the reference line on the same side is not less than 0.5 mm, or the maximum distance ranges from 1 mm to 3 mm.

35. The dental orthodontic appliance according to claim 32, characterized in that: The inner line includes wave crest segments, and an end point of each wave crest segment is disposed adjacent to a corresponding tip.

36. The dental orthodontic appliance according to claim 32, characterized in that: The inner line includes a first inner line close to the buccal surface of the orthodontic device body and a second inner line close to the lingual surface of the orthodontic device body, a first gap is provided between the first inner line and the corresponding dividing line, and a second gap is provided between the second inner line and the corresponding dividing line.

37. The dental orthodontic appliance according to claim 25, characterized in that The jaw pad includes an outer contour line formed at the junction area with the occlusal surface, an end face away from the occlusal surface, and a side surface connecting the outer periphery of the end face and the outer contour line. The end face and the side surface are arranged to form a cavity. The orthodontic device body has a cavity for accommodating teeth, and the cavity is connected to the cavity.

38. The dental orthodontic appliance according to claim 37, characterized in that The side surface is formed by a plurality of curved surfaces, and adjacent curved surfaces have a smooth transition.

39. The dental orthodontic appliance according to claim 37, characterized in that: A plurality of points on the outer contour line form a reference plane, and the side surface is perpendicular to the reference plane, or at least a portion of the side surface forms an acute angle with the reference plane.

40. The dental orthodontic appliance according to claim 37, characterized in that The shape of the end surface matches the shape of the opposing jaw occlusal surface.

41. The dental orthodontic appliance according to claim 37, characterized in that: The orthodontic appliance also includes a filling portion located within the cavity.

42. The dental orthodontic appliance according to claim 25, characterized in that The jaw pad comprises a plurality of first occlusal surfaces and a plurality of second occlusal surfaces which are connected one by one at intervals, and the jaw pad at each second occlusal surface has an inward shrinking tendency.

43. A dental orthodontic appliance assembly, characterized in that: It includes a dental orthodontic appliance and an opposing dental orthodontic appliance as described in any one of claims 25 to 42, wherein one of the dental orthodontic appliance and the opposing dental orthodontic appliance is arranged corresponding to maxillary teeth, and the other is arranged corresponding to mandibular teeth, and the opposing dental orthodontic appliance includes an opposing dental appliance body and a guide portion located on the occlusal surface of the opposing dental appliance body, and when in an occlusal state, the guide portion and the jaw pad cooperate with each other in the mesiodistal direction to realize horizontal movement of the maxillary teeth or the mandibular teeth.

44. A method for designing a digital jaw pad, characterized in that: include: Obtain the target digital dental jaw; According to the outer contour of the target end face of the target digitized jaw, a reference line of the digital jaw pad on the target end face is determined. The target end face is the tooth end face away from the gums in the target digitized jaw. The reference line is used to generate the digital jaw pad.

45. The design method according to claim 44, characterized in that: The reference line of the target end surface is determined according to at least one of the following: the shape of the outer contour of the target end surface and the tooth supporting capacity of the target end surface.

46. ​​The design method according to claim 45, characterized in that: The design method comprises: The outer contour is offset toward a direction close to a reference line to form two inner contour lines close to the buccal surface and the lingual surface respectively, wherein the reference line extends in a mesiodistal direction and passes through the center of the target end surface or through the cusp of the target end surface; Connect two inner contour lines to form a closed reference line.

47. The design method according to claim 44, characterized in that: The design method comprises: A reference area located inside the outer contour is formed on the target end surface, and the periphery of the reference area forms a closed reference line.

48. The design method according to any one of claims 44 to 47, characterized in that: The design method comprises: obtaining a tooth supporting capacity of the target end surface; The reference line is determined based on a tooth supporting capacity of at least a portion of the target end surface.

49. The design method according to claim 48, characterized in that: The design method comprises: The distance between the reference line and the center line is determined according to the tooth supporting capacity, the center line is defined as passing through the center of the target end surface and extending in the mesiodistal direction, the distance is the distance in the buccolingual direction, and the distance is proportional to the tooth supporting capacity.

50. The design method according to claim 48, characterized in that: The design method comprises: Select multiple target points on the target end surface according to the tooth supporting capacity, wherein the vertical distance between the target point and the center line is proportional to the tooth supporting capacity, and the center line is defined as passing through the center of the target end surface and extending in the mesiodistal direction; The reference line is formed by fitting a plurality of target points.

51. The design method according to any one of claims 44 to 50, characterized in that: The area where the baseline corresponds to the gap between adjacent teeth tends to shrink inward.

52. The design method according to claim 44, characterized in that: The design method comprises: Selecting a plurality of first target points in the posterior tooth region of the target end surface, wherein the first target points are adjacent to the posterior tooth cusps; and / or selecting a plurality of second target points in the posterior tooth region of the target end surface, wherein the second target points are located in at least one of the adjacent tooth gap and the pit and fissure region; The reference line is formed by fitting a plurality of first target points and / or second target points.

53. The design method according to claim 52, characterized in that: The first target point located on the same side is offset from a center line compared to the second target point, and the center line is defined as passing through the center of the target end surface and extending in the mesiodistal direction.

54. The design method according to claim 52 or 53, characterized in that: The reference line includes two curves respectively close to the buccal surface and the lingual surface. The first target point is a protruding point of one of the curves relative to the other curve, and the second target point is a concave point of one of the curves relative to the other curve.

55. The design method according to any one of claims 44 to 54, characterized in that: The design method comprises: Selecting at least one third target point in the posterior tooth region of the target end surface, the third target point is located in the pit and fissure region, and the third target point is used to form the reference line; The third target point is located at the proximal end of the reference line and the third target point is recessed toward the distal direction, and / or the third target point is located at the distal end of the reference line and the third target point is recessed toward the proximal direction.

56. The design method according to any one of claims 44 to 55, characterized in that: The design method comprises: The digital jaw pad is generated by adjusting the preset jaw pad based on the reference line and the occlusal relationship between the target digital jaw and the opposing digital jaw.

57. A method for forming a corrective appliance, characterized in that: include: Acquire a target digitalized dental jaw with a digitalized jaw pad according to the design method of a digitalized jaw pad according to any one of claims 44 to 56; Generate an appliance with a jaw pad.

58. A corrective appliance, characterized in that: The orthodontic appliance is obtained according to the orthodontic appliance molding method of claim 57.

59. A brace assembly, characterized in that: It comprises an orthodontic appliance with a jaw pad as described in claim 58 and an opposing jaw appliance with a guide portion, wherein the orthodontic appliance is arranged corresponding to one of the maxillary teeth or the mandibular teeth, and the opposing jaw appliance is arranged corresponding to the other one, and when in an occlusal state, the guide portion and the jaw pad cooperate with each other in the mesiodistal direction to realize horizontal movement of the maxillary teeth or the mandibular teeth.

60. A device for designing a digital jaw pad, characterized in that: include: The first module is used to obtain the target digital dental jaw; The second module is used to determine the reference line of the digital jaw pad on the target end face of the target digital jaw according to the outer contour of the target end face of the target digital jaw. The target end face is the end face of the tooth in the target digital jaw away from the gums, and the reference line is used to generate the digital jaw pad.

61. An electronic device, characterized in that: It includes a processor, a memory and a communication bus, wherein the processor and the memory communicate with each other via the communication bus; The memory is used to store the application program; The processor is used to implement the steps of the digital jaw pad design method described in any one of claims 44-56 when executing the application stored in the memory.

62. A storage medium having an application stored thereon, characterized in that: When the application is executed, the steps of the digital jaw pad design method described in any one of claims 44-56 are implemented.

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