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

Abstract

The utility model discloses a shell-shaped dental instrument and a shell-shaped dental instrument component, the shell-shaped dental instrument comprises an appliance and a supporting unit, the appliance is provided with a cavity for accommodating teeth, and the occlusal surface of the appliance comprises a supporting surface corresponding to the occlusal surface of a certain rear tooth. The supporting surface comprises a first supporting surface positioned in the middle and a second supporting surface arranged around the first supporting surface, a separation line between the first supporting surface and the second supporting surface passes through the plurality of tips, the plurality of tips respectively correspond to a plurality of tooth tips of the rear teeth, the supporting unit is positioned on the supporting surface, and a first outer peripheral edge line is formed in a junction area of the supporting unit and the supporting surface; the first outer peripheral line comprises a first part located on the first supporting face and a second part located on the second supporting face, the second part is connected with the first part, and the second part is located on the cheek side or the tongue side of the first supporting face. The supporting unit extends to the second supporting surface, so that the contact area between the supporting unit and a jaw occlusal surface can be increased, and the purpose of stable occlusal is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental orthodontic technical field, especially a kind of shell-shaped dental instrument and shell-shaped dental instrument assembly. BACKGROUND

[0002] Malocclusion refers to the malformation of teeth, jaw and craniofacial caused by congenital or acquired factors during the growth and development of children, mainly manifested as misaligned teeth and malposition of upper and lower jaws (such as buck teeth and pinched mouth).

[0003] Currently, for malocclusion, shell-shaped dental instruments including jaw pads are usually used for treatment, and the jaw pads in the prior art have the problems of small contact area with the occlusal surface of the opposite jaw or no contact. SUMMARY

[0004] The utility model aims to provide a kind of shell-shaped dental instrument, the contact area between support unit and the occlusal surface of the opposite jaw can be increased.

[0005] To achieve one of the above utility model purposes, one embodiment of the utility model provides a kind of shell-shaped dental instrument, including the appliance with the cavity containing teeth and support unit, the occlusal surface of the appliance includes the support surface corresponding to the occlusal surface of a certain posterior tooth, the support surface includes the first support surface located in the middle and the second support surface arranged around the first support surface, the separation line between the first support surface and the second support surface passes through a plurality of tips, and the plurality of tips correspond to a plurality of cusps of posterior teeth respectively, the support unit is located on the support surface, the intersection area of the support unit and the support surface forms a first outer circumferential line, the first outer circumferential line includes a first part located on the first support surface and a second part located on the second support surface, the second part is connected to the first part, and the second part is located on the buccal side or lingual side of the first support surface.

[0006] Optionally, the support unit is vertically arranged relative to the jaw plane, or the support unit is obliquely arranged relative to the jaw plane.

[0007] Optionally, when the second part is located on the buccal side of the first support surface, the support unit is inclined towards one side of the buccal surface of the appliance; when the second part is located on the lingual side of the first support surface, the support unit is inclined towards one side of the lingual surface of the appliance.

[0008] Optionally, the second part is located on the buccal side of the first support surface, and there is a gap between the region of the first part close to the lingual surface of the appliance 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 region of the first part close to the buccal surface of the appliance and the separation line.

[0009] Optionally, the second portion is located on one of the buccal side and the lingual side of the first support surface.

[0010] Optionally, the first outer periphery line is a ring-shaped closed structure, and the first portion has a gap or overlaps between the mesial end and the distal end of the separation line.

[0011] Optionally, the first outer periphery line is a ring-shaped closed structure, and the second portion is also located on the mesial side and / or the distal side of the first support surface.

[0012] Optionally, the first outer periphery line comprises a plurality of curved lines, and adjacent curved lines are smoothly connected.

[0013] Optionally, the first outer periphery line comprises at least one concave portion and at least one convex portion, and when the first outer periphery line comprises a plurality of concave portions or a plurality of convex portions, the concave portions and the convex portions are alternately connected.

[0014] Optionally, the end point of the convex portion is adjacent to the corresponding tip.

[0015] Optionally, the shell-shaped dental appliance further comprises a connecting unit located on the occlusal surface of the appliance, the connecting unit connects two support units, the connecting unit and the occlusal surface form a second outer periphery line at the junction, and the second outer periphery line connects the first outer periphery line.

[0016] Optionally, the first outer periphery line extends in the mesial-distal direction of the appliance and connects the second outer periphery line, and the first outer periphery line and the second outer periphery line are smoothly connected.

[0017] Optionally, the second portion is located on the buccal side of the first support surface, and the first portion has a gap between the area close to the lingual surface of the appliance and the separation line, or the second portion is located on the lingual side of the first support surface, and the first portion has a gap between the area close to the buccal surface of the appliance and the separation line.

[0018] Optionally, the second outer periphery line comprises a lingual side line close to the lingual surface of the appliance and a buccal side line close to the buccal surface of the appliance, the lingual side line is concave towards the buccal side line, and the buccal side line is concave towards the lingual side line.

[0019] Optionally, the second outer periphery line comprises a first end connected to one of the first outer periphery lines and a second end connected to another of the first outer periphery lines, and in the direction from the buccal surface of the appliance towards the lingual surface, the second outer periphery line has a width that decreases first and then increases when the width transitions from the first end to the second end.

[0020] Optionally, the shell-shaped dental instrument comprises a plurality of support units and a plurality of connecting units connected in sequence.

[0021] Optionally, the support unit surrounds to form a cavity, and the cavity is communicated with the cavity.

[0022] To achieve the above-mentioned one of the purposes of the utility model, the utility model provides a kind of shell-shaped dental instrument assembly, including the shell-shaped dental instrument and the shell-shaped dental instrument of opposite jaw as described in any one of the above technical solutions, one of the shell-shaped dental instrument and the shell-shaped dental instrument of opposite jaw is arranged corresponding to upper jaw teeth, wherein the other is arranged corresponding to lower jaw teeth, the shell-shaped dental instrument of opposite jaw includes opposite jaw appliance with cavity for accommodating teeth, when upper jaw and lower jaw are in occlusion, the support unit abuts the occlusal surface of the opposite jaw appliance, or the support unit abuts the opposite jaw support unit on the occlusal surface of opposite jaw appliance.

[0023] Compared with prior art, the utility model has the beneficial effects that: part (corresponding to the part of first part) of the support unit of the utility model one embodiment is arranged corresponding to first support surface, and another part (corresponding to the part of second part) is arranged corresponding to second support surface, and the advantage of such arrangement is that: first support surface can play the stable supporting role to support unit, to maintain stable occlusal pressure, and support unit extending to second support surface can increase the contact area between the opposite jaw occlusal surface, to achieve the purpose of stable occlusion. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the schematic diagram of the shell-shaped dental instrument of the utility model one embodiment (first specific embodiment);

[0025] Figure 2 It is the perspective view of the shell-shaped dental instrument (support unit is vertically arranged relative to jaw plane) corresponding to single posterior tooth of the utility model one embodiment (first specific embodiment);

[0026] Figure 3 It is the perspective view of the shell-shaped dental instrument (support unit is vertically arranged relative to jaw plane) corresponding to single posterior tooth of the utility model one embodiment (first specific embodiment); Figure 2 It is the schematic diagram of the support unit in the cooperation with the opposite jaw occlusal surface;

[0027] Figure 4 It is the perspective view of the shell-shaped dental instrument (support unit is vertically arranged relative to jaw plane) corresponding to single posterior tooth of the utility model one embodiment (first specific embodiment);

[0028] Figure 5 It is the schematic diagram of the support unit in the cooperation with the opposite jaw occlusal surface; Figure 4 It is the schematic diagram of the support unit in the cooperation with the opposite jaw occlusal surface;

[0029] Figure 6 And Figure 7is a different schematic view of the support unit corresponding to a single posterior tooth of the first embodiment of the utility model;

[0030] Figure 8 is a schematic view of the support unit corresponding to a single posterior tooth of the second embodiment of the utility model;

[0031] Figure 9 is a schematic view of the shell-shaped dental instrument of the third embodiment of the utility model;

[0032] Figure 10 is a schematic view of a partial region of the shell-shaped dental instrument of the third embodiment of the utility model;

[0033] Figure 11 is a schematic view of the support unit and the connecting unit corresponding to a single posterior tooth of the third embodiment of the utility model;

[0034] Figure 12 is a schematic view of the shell-shaped dental instrument assembly of the first embodiment of the utility model. DETAILED DESCRIPTION

[0035] The utility model will be described in detail below in combination with the specific embodiments shown in the drawings. However, these embodiments do not limit the utility model, and the structural, method or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the utility model.

[0036] In combination with Figures 1 to 3 , a schematic view of the shell-shaped dental instrument 100 of the first embodiment of the utility model is shown.

[0037] The shell-shaped dental instrument 100 comprises an appliance 10 having a cavity S for accommodating teeth and a support unit 20, and each support unit 20 is arranged corresponding to a posterior tooth in the posterior tooth area.

[0038] The occlusal surface A1 of the appliance 10 comprises a support surface A11 corresponding to the occlusal surface of a posterior tooth, i.e. each support surface A11 is arranged 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.

[0039] 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, and the separation line L between the first support surface A111 and the second support surface A112 passes through a plurality of cusps R, and each cusp R corresponds to a plurality of cusps of the posterior tooth.

[0040] The first support surface A111 is the central region of the support surface A11, and the first support surface A111 corresponds to the occlusal surface of the posterior tooth. Figure 2the second support surface A112 is a peripheral region of the support surface A11, the second support surface A112 corresponds to Figure 2 the peripheral inclined portion in the support surface A11 (i.e. a part of the second support surface A112 connecting the buccal surface A2 and the lingual surface A3 of the appliance 10), the first support surface A111 can provide stable support for the support unit 20, and can improve the stability of the support unit 20 under occlusal pressure.

[0041] The support unit 20 of the present embodiment is located on the support surface A11, and the intersection of the support unit 20 and the support surface A11 forms a first outer peripheral line L1, the first outer peripheral line L1 includes a first part L11 located on the first support surface A111 and a second part L12 located on the second support surface A112, the second part L12 connects the first part L11, and the second part L12 is located on the buccal side or the lingual side of the first support surface A111.

[0042] The "first part L11 located on the first support surface A111" means that the first part L11 does not exceed the separation line L, and the first part L11 is located on the inner side of the separation line L.

[0043] The "second part L12 located on the second support surface A112" means that the second part L12 exceeds the separation line L, and the second part L12 is located on the outer side of the separation line L.

[0044] The "second part L12 connecting the first part L11" means that the second part L12 and the first part L11 are located on the same support unit 20, and the second part L12 and the first part L11 are continuous structures.

[0045] The "second part L12 located on the buccal side or the 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 towards the buccal surface A2 and the lingual surface A3 of the appliance 10, and the location of the second part L12 on the buccal side or the lingual side of the first support surface A111 can be determined according to the positional relationship between the upper and lower jaws, i.e. the extension direction of the second part L12 can be determined according to the malocclusion direction.

[0046] For example, when the occlusal surface of the counter-jaw cooperating with the support unit 20 is mainly close to the buccal side of the first support surface A111 (i.e. 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 counter-jaw; when the occlusal surface of the counter-jaw cooperating with the support unit 20 is mainly close to the lingual side of the first support surface A111 (i.e. 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 counter-jaw, Figure 3 For example, when the occlusal surface of the counter-jaw cooperating with the support unit 20 is mainly close to the buccal side of the first support surface A111 (i.e. 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 counter-jaw; when the occlusal surface of the counter-jaw cooperating with the support unit 20 is mainly close to the lingual side of the first support surface A111 (i.e. 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 counter-jaw,

[0047] The “occlusal surface of the opposite jaw” can be the occlusal surface of the tooth of the opposite jaw, the occlusal surface of the opposite jaw appliance, or the occlusal surface of the opposite jaw support unit.

[0048] The first part (the part corresponding to the first part L11) of the support unit 20 in this embodiment is provided with the first support surface A111, and the second part (the part corresponding to the second part L12) is provided with the second support surface A112. The advantage of such an arrangement is that the first support surface A111 can provide stable support for the support unit 20, thereby maintaining a stable occlusal pressure, and the extension of the support unit 20 to the second support surface A112 can increase the contact area between the support unit 20 and the occlusal surface of the opposite jaw, thereby achieving the purpose of stable occlusion.

[0049] Alternatively, the second part L12 is located on one of the buccal side and the lingual side of the first support surface A111, i.e., the second part L12 is located only on the buccal side of the first support surface A111 but not on the lingual side of the first support surface A111, or the second part L12 is located only on the lingual side of the first support surface A111 but not on the buccal side of the first support surface A111, i.e., in the buccal-lingual direction of the appliance 10, a part of the first outer peripheral line L1 is located on the first support surface A111, and the other part is located on the second support surface A112.

[0050] Alternatively, the second part L12 is located on the buccal side of the first support surface A111, and the first part L11 has a gap between the area close to the lingual surface A3 of the appliance 10 and the separation line L, or the second part L12 is located on the lingual side of the first support surface A111, and the first part L11 has a gap between the area close to the buccal surface of the appliance 10 and the separation line L, i.e., in the buccal-lingual direction of the appliance 10, a part of the first outer peripheral line L1 is located on the first support surface A111, and the other part is located on the second support surface A112.

[0051] Alternatively, in combination with Figure 2 and Figure 3 , the support unit 20 is arranged vertically relative to the jaw plane P, or in combination with Figure 4 and Figure 5 , the support unit 20 is arranged obliquely relative to the jaw plane P, and the jaw plane P is substantially a plane parallel to the horizontal plane.

[0052] The support unit 20 comprises 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, and at this time the end surface 21 and the side surface 22 form a cavity S1.

[0053] Alternatively, in combination with Figure 2, the "support unit 20 is vertically arranged relative to the jaw plane P" means that the central axis Z of the support unit 20 is substantially perpendicular to the jaw plane P, that is, the support unit 20 is substantially vertically extended, and the support unit 20 has a first cross section in a direction parallel to the jaw plane P, and when the first cross section remains consistent in the vertical direction, the support unit 20 can be regarded as a straight cylinder structure, and the side surface 22 of the support unit 20 is substantially perpendicular to the jaw plane P, and the projection of the first outer peripheral line L1 on the jaw plane P is coincident with the projection of the peripheral edge of the end surface 21 on the jaw plane P.

[0054] When the support unit 20 is vertically arranged relative to the jaw plane P, the contact area between the support unit 20 and the opposing occlusal surface is increased by the support unit 20 corresponding to the second portion L12.

[0055] In combination Figure 4 The "support unit 20 is obliquely arranged relative to the jaw plane P" means that the central axis Z of the support unit 20 forms an acute angle with the jaw plane P, that is, the support unit 20 extends obliquely relative to the vertical direction.

[0056] When the second portion L12 is located on the buccal side of the first support surface A111, the support unit 20 is inclined toward one side of the buccal surface A2 of the appliance 10, and at this time, on the basis of increasing the contact area between the support unit 20 and the opposing occlusal surface by the support unit 20 corresponding to the second portion L12, the contact area between the support unit 20 and the opposing occlusal surface is further increased by the support unit 20 inclined toward one side of the buccal surface A2 of the appliance 10.

[0057] When the second portion L12 is located on the lingual side of the first support surface A111, the support unit 20 is inclined toward one side of the lingual surface A3 of the appliance 10, and at this time, on the basis of increasing the contact area between the support unit 20 and the opposing occlusal surface by the support unit 20 corresponding to the second portion L12, the contact area between the support unit 20 and the opposing occlusal surface is further increased by the support unit 20 inclined toward one side of the lingual surface A3 of the appliance 10. Figure 5 For example, the second portion L12 is located on the lingual side of the first support surface A111.

[0058] In addition, the obliquely arranged support unit 20 can also reduce the difficulty of demolding.

[0059] Optionally, the form of the end surface 21 of the support unit 20 and the form of the opposing occlusal surface are matched with each other.

[0060] The "form of the end surface 21 of the support unit 20 and the form of the opposing occlusal surface are matched with each other" means that when the upper and lower jaws are occluded, the end surface 21 of the support unit 20 and the opposing occlusal surface can be matched together, so that the accuracy of the occlusion position and the stability of the occlusion can be improved, and the effect of the jaw position correction is improved.

[0061] The end surface 21 of the support unit 20 in this embodiment is irregular, i.e., the end surface 21 is not planar.

[0062] Optionally, the support unit 20 surrounds to form a cavity S1, and the cavity S1 is communicated with the cavity S.

[0063] The appliance 10 can be a high-molecular material-made invisible appliance, the cavity S has a geometry for repositioning the dentition from a current layout to a next layout, the support unit 20 can be integrally formed with the appliance 10, and the cavity S1 formed by the support unit 20 is communicated with the cavity S formed by the appliance 10.

[0064] The support unit 20 forming the cavity S1 is a hollow structure, and the hollow structure of the support unit 20 is more prone to collapse. The shell-shaped dental instrument 100 can further include a filling portion located in the cavity S1. The filling portion can enhance the strength of the support unit 20 and further avoid the collapse of the support unit 20.

[0065] Optionally, the first outer peripheral line L1 includes a plurality of curved lines, and adjacent curved lines are smoothly connected.

[0066] Correspondingly, the side surface 22 of the support unit 20 is surrounded by a plurality of curved surfaces, and adjacent curved surfaces are smoothly connected.

[0067] 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 received by the entire support unit 20 can be uniformly distributed, avoiding the presence of stress concentration in the support unit 20, thereby enhancing the strength of the support unit 20. Moreover, when the shell-shaped dental instrument 100 with the support unit 20 is obtained by demolding, the arc transition can effectively reduce the difficulty of demolding.

[0068] 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 a plurality of recessed portions or a plurality of protruding portions, the recessed portions and the protruding portions are connected one by one at intervals, i.e., the first outer peripheral line L1 is approximately in a wave shape.

[0069] It can be understood that the structure between the two adjacent protruding portions is a recessed portion, and similarly, the structure between the two adjacent recessed portions is a protruding portion. The protruding portion can further enhance the strength of the corresponding support unit 20.

[0070] The end point M of the protruding portion is adjacent to the corresponding tip R, wherein the end point M of the protruding portion refers to the highest point of the protruding portion, i.e., the peak point of the protruding portion. The end point M of the protruding portion includes the end point M1 of the protruding portion at the first portion L11 and the end point M2 of the protruding portion at the second portion L12.

[0071] The end points M of the protrusions and the tips R are matched in position. For example, for a certain posterior tooth, the end points M1 of the protrusions of the first portion L11 are closer to the center of the posterior tooth than the corresponding tips R, and the distance between each end point M1 and the corresponding tip R remains substantially the same. The end points M2 of the protrusions of the second portion L12 are farther away from the center of the posterior tooth than the corresponding tips R, and the distance between each end point M2 and the corresponding tip R remains substantially the same. At this time, the protrusions are personalized for different posterior teeth of different patients or different posterior teeth of the same patient, so that the support unit 20 is more matched with the corresponding posterior tooth.

[0072] In addition, the first outer peripheral line L1 is a symmetrical structure, which can enhance the uniformity of the stress of the corresponding support unit 20.

[0073] Next, two specific embodiments of the shell-shaped dental instrument are introduced.

[0074] In the first specific embodiment, in combination with Figures 1 to 6 The first outer peripheral line L1 formed by the intersection of the support unit 20 and the support surface A11 is a ring-shaped closed structure, and the first portion L11 has a gap or coincides with the mesial end and the distal end of the separation line L.

[0075] That is, at this time, the support unit 20 is an independent structure not connected to other structures, and each support unit 20 is independently arranged corresponding to a posterior tooth. At this time, the support unit 20 can be personalized according to the specific size of the posterior tooth, the required occlusal pressure, etc. For example, different posterior teeth are personalized to configure support units 20 of different shapes and sizes.

[0076] In combination with Figure 1 The ring-shaped closed structure surrounded by the first outer peripheral line L1 is approximately plum blossom-shaped.

[0077] Figure 1 The ring-shaped closed structure surrounded by the first outer peripheral line L1 at the 16th posterior tooth is a central symmetrical structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and the four recesses are connected one by one in intervals. The four protrusions are the same in shape.

[0078] Figure 1 The ring-shaped closed structure surrounded by the first outer peripheral line L1 at the 14th posterior tooth is an axial symmetrical structure, and the symmetrical structure includes four protrusions and four recesses, and the four protrusions and the four recesses are connected one by one in intervals. The two protrusions located on the same straight line are the same in shape. Since the size of the posterior tooth in the mesial-distal direction is relatively small, the size of the protrusion of the first outer peripheral line L1 in the mesial-distal direction is also relatively small.

[0079] In this specific embodiment, in combination with Figure 6, the first outer peripheral line L1 is in a ring-like closed structure, a first portion L11 of the first outer peripheral line L1 has a gap with the division line L, and the first portion L11 has gaps with the mesial end, the distal end and the buccal side of the division line L, that is, the second portion L12 is only located on the lingual side of the first support surface A111.

[0080] Specifically, taking the first portion L11 and the division line L close to the buccal surface A2 of the appliance 10 as an example, the first portion L11 includes a protruding portion close to the buccal surface A2, and in the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10, the first gap P1 between the protruding portion and the division line L is not less than 1 mm.

[0081] In combination with Figure 7 , compared with Figure 6 the first outer peripheral line L1, Figure 7 , the first portion L11 and the mesial end and the distal end of the division line L coincide, Figure 7 , the first outer peripheral line L1 extends in the mesial direction and the distal direction and contacts the division line L, at this time, the first portion L11 of the first outer peripheral line L1 still does not exceed the division line L, the mesial end and the distal end of the first outer peripheral line L1 coincide with the division line L, and at this time, the first outer peripheral line L1 is still in a ring-like closed structure.

[0082] In addition, Figure 7 , the first outer peripheral line L1 is relatively long, and the corresponding support unit 20 is also relatively large in size, and the support unit 20 can provide a larger area to maintain a larger bite force.

[0083] Specifically, taking the first portion L11 and the division line L close to the buccal surface A2 of the appliance 10 as an example, the first portion L11 includes a protruding portion close to the buccal surface A2, and in the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10, the first gap P1 between the protruding portion and the division line L is not less than 1 mm.

[0084] In combination with Figure 8 , the schematic view of the shell-shaped dental appliance 100 of the second specific embodiment, the same or similar structures are marked with the same or similar reference numerals for ease of description.

[0085] The main difference between the second specific embodiment and the first specific embodiment is that the second portion L12 is also located on the mesial side and / or the distal side of the first support surface A111, and here, taking the second portion L12 as an example, the second portion L12 is located on the mesial side, the distal side and the lingual side of the first support surface A111, and the first portion L11 has a gap with the buccal side of the division line L.

[0086] Specifically, taking the first portion L11 and the separation line L close to the buccal surface A2 of the appliance 10 as an example, the first portion L11 includes a protruding portion close to the buccal surface A2, and the first gap P1 between the protruding portion and the separation line L in the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10 is not less than 1 mm.

[0087] In combination Figures 9 to 11 FIG. 1 is a schematic view of a shell-shaped dental appliance 100 according to a first embodiment of the present disclosure, and the same or similar structures are denoted by the same or similar reference numerals.

[0088] In the present embodiment, the shell-shaped dental appliance 100 further includes a connecting unit 30 located on the occlusal surface A1 of the appliance 10, and the connecting unit 30 connects two support units 20. The connecting unit 30 and the occlusal surface A1 form a second outer peripheral line L2, and the second outer peripheral line L2 connects the first outer peripheral line L1.

[0089] That is, at this time, the support unit 20 is connected to other structures, the first outer peripheral line L1 formed by the intersection of one support unit 20 and the support surface A11 is not a closed structure, and the free end of the first outer peripheral line L1 is connected to the second outer peripheral line L2. Correspondingly, the support unit 20 and the connecting unit 30 are connected together to cover multiple posterior teeth, and at this time, the multiple support units 20 can provide more area to maintain greater occlusal pressure.

[0090] It should be noted that, taking the first portion L11 and the separation line L close to the buccal surface A2 of the appliance 10 as an example, the first portion L11 includes a protruding portion close to the buccal surface A2, and the first gap P1 between the protruding portion and the separation line L in the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10 is not less than 1 mm.

[0091] The occlusal surface A1 includes a connecting surface A12 connecting two adjacent support surfaces A11, and 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 arranged corresponding to the interproximal space, and the “interproximal space” refers to the area between two adjacent teeth.

[0092] Since the support unit 20 is connected to the first support surface A111, the connecting unit 30 connecting the two adjacent support units 20 actually connects the connecting surface A12 and the second support surface A112. That is, the connecting unit 30 extends from the connecting surface A12 to the second support surfaces A112 on both sides to connect the two support units 20 on both sides.

[0093] The first outer peripheral line L1 extends in the mesial-distal direction of the appliance 10 and connects the second outer peripheral line L2, and the first outer peripheral line L1 and the second outer peripheral line L2 are smoothly connected.

[0094] The second outer peripheral line L2 connects the mesial end or the 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 therebetween.

[0095] In the specific embodiment, the first outer peripheral line L1 provided corresponding to the posterior tooth can also be regarded as a symmetrical structure, and the first outer peripheral line L1 includes protruding portions and recessed portions to improve the strength of the support unit 20.

[0096] The second outer peripheral line L2 includes a lingual side line L21 close to the lingual surface A3 of the appliance 10 and a buccal side line L22 close to the buccal surface A2 of the appliance 10, the lingual side line L21 is recessed toward the buccal side line L22, and the buccal side line L22 is recessed toward the lingual side line L21.

[0097] 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 another one of the first outer peripheral lines L1. In the direction from the buccal surface A2 to the lingual surface A3 of the appliance 10, the second outer peripheral line L2 has a width that decreases first and then increases when transitioning from the first end L2' to the second end L2".

[0098] The connecting unit 30 corresponding to the second outer peripheral line L2 generally has a tendency to be retracted inward.

[0099] In the direction from the buccal surface A2 to the lingual surface A3 of the posterior tooth, the width of the posterior tooth occlusal surface is greater than the width of the interproximal space. When the support unit 20 and the connecting unit 30 are subjected to the occlusal pressure applied by the opposite tooth, the posterior tooth occlusal surface supports the support unit 20 located on the support surface A11, and the interproximal space supports the connecting unit 30 located at the interproximal space. That is, the relatively wide posterior tooth occlusal surface supports the relatively wide support unit 20, and the relatively narrow interproximal space supports the relatively narrow connecting unit 30. At this time, the lower part of the support unit 20 and the connecting unit 30 is supported by the tooth (posterior tooth occlusal surface or interproximal space), avoiding the deformation and collapse of the support unit 20 and the connecting unit 30 due to the lack of support from the tooth below.

[0100] 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.

[0101] 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 connecting unit 30 located on the interproximal space, and by reasonably designing the first width d1 and the second width d2, the lower part of the support unit 20 and the connecting unit 30 can be supported by the teeth, and the first width d1 and the second width d2 can be customized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0102] Specifically, the ratio of the maximum value of the first width d1 to the minimum value of the second width d2 ranges from 0.15 to 0.5, and the minimum value of the second width d2 is not less than 0.5 mm.

[0103] It should be noted that, since the width of the area in the interproximal space that can support the connecting unit 30 is narrow, a relatively narrow second width d2 is needed to avoid the connecting unit 30 being unsupported by teeth below, and when the second width d2 is too narrow, the process difficulty will be increased, and when the second width d2 is directly zero (i.e., multiple support units 20 are distributed at intervals), the demolding difficulty will be greatly increased.

[0104] In consideration of the process difficulty, demolding difficulty, and the narrowest second width d2, the minimum value of the second width d2 is controlled to be not less than 0.5 mm, and preferably, the minimum value of the second width d2 ranges from 1 mm to 4 mm.

[0105] In addition, the minimum value of the first width d1 is greater than or equal to the maximum value of the second width d2, further ensuring that the first width d1 is relatively large and the second width d2 is relatively small.

[0106] In the embodiment, the shell-shaped dental instrument 100 includes a plurality of support units 20 and a plurality of connecting units 30 connected at intervals, i.e., the occlusal surface of the appliance 10 is provided with one support unit 20, one connecting unit 30, one support unit 20, one connecting unit 30, and so on, which are connected in sequence.

[0107] Each connecting unit 30 has a tendency to shrink inward, and the degree of inward shrinkage of the connecting unit 30 at each interproximal space is related to the width of the interproximal space.

[0108] It can be seen that the connecting unit 30 at the interproximal space is also customized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0109] In general, various parameters of the present embodiment can be customized according to individual cases, including the first width d1 of the support unit 20, the second width d2 of the connecting unit 30, the relationship between the end point M and the tip R of each protrusion, the peak and valley segments in the first outer circumferential line L1 and the second outer circumferential line L2, the connection relationship between the first outer circumferential line L1 and the second outer circumferential line L2, the gap between the first outer circumferential line L1 and the separation line L, and the like, so that the support unit 20 and the connecting unit 30 can be more matched with posterior teeth, and the lower part of each part of the support unit 20 and the connecting unit 30 is supported by teeth.

[0110] In combination Figure 12 , the present embodiment further provides a shell-shaped dental instrument assembly 300, which comprises the shell-shaped dental instrument 100 and the counter shell-shaped dental instrument 200 as described above.

[0111] One of the shell-shaped dental instrument 100 and the counter shell-shaped dental instrument 200 is arranged corresponding to the upper jaw teeth, and the other is arranged corresponding to the lower jaw teeth.

[0112] The counter shell-shaped dental instrument 200 comprises a counter appliance 201 having a cavity for accommodating teeth, and when the upper and lower jaws are in occlusion, the support unit 20 abuts against the counter occlusal surface of the counter appliance 201.

[0113] The counter occlusal surface can be the occlusal surface 2011 of the counter appliance 201 or the occlusal surface of the counter support unit located on the occlusal surface of the counter appliance 201, and here the counter occlusal surface is taken as the occlusal surface 2011 of the counter appliance 201 as an example.

[0114] The support unit 20 of the present embodiment extends to the second support surface A112, which can effectively increase the contact area between the support unit 20 and the counter occlusal surface, and thus achieve the purpose of stabilizing occlusion.

[0115] As described above, a part of the support unit 20 (the part corresponding to the first part L12) is arranged corresponding to the first support surface A111, and the other part (the part corresponding to the second part L12) is arranged corresponding to the second support surface A112, and the advantages of such arrangement are that the first support surface A111 can stably support the support unit 20, thereby maintaining stable occlusal pressure, and the support unit 20 extending to the second support surface A112 can increase the contact area with the counter occlusal surface, thereby achieving the purpose of stabilizing occlusion.

[0116] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0117] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A shell-shaped dental instrument, characterized in that, The orthodontic appliance includes a cavity for accommodating teeth and a support unit. The occlusal surface of the appliance includes a support surface corresponding to the occlusal surface of a certain posterior tooth. The support surface includes a first support surface located in the middle and a second support surface disposed around the first support surface. A dividing line between the first support surface and the second support surface passes through multiple cusps, which respectively correspond to multiple cusps of the posterior teeth. The support unit is located on the support surface. The junction area between the support unit and the support surface forms a first peripheral line. The first 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 connects to the first portion and is located on the buccal or lingual side of the first support surface.

2. The shell-shaped dental instrument according to claim 1, characterized in that, The support unit is arranged perpendicularly to the jaw plane, or the support unit is arranged at an angle relative to the jaw plane.

3. The shell-shaped dental instrument according to claim 1, characterized in that, When the second part is located on the cheek side of the first support surface, the support unit is tilted toward one side of the cheek surface of the orthodontic appliance; when the second part is located on the lingual side of the first support surface, the support unit is tilted toward one side of the lingual surface of the orthodontic appliance.

4. The shell-shaped dental instrument according to claim 1, characterized in that, The second portion is located on the buccal side of the first support surface, and there is a gap between the area of ​​the first portion near the lingual side of the orthodontic appliance and the dividing line; or, the second portion is located on the lingual side of the first support surface, and there is a gap between the area of ​​the first portion near the buccal side of the orthodontic appliance and the dividing line.

5. The shell-shaped dental instrument according to claim 1, characterized in that, The second part is located on one side of the first support surface, on the cheek side and the tongue side.

6. The shell-shaped dental instrument according to claim 1 or 5, characterized in that, The first outer peripheral line is a closed ring structure, and the first part has a gap or overlap with the near and far ends of the dividing line.

7. The shell-shaped dental instrument according to claim 5, characterized in that, The first outer perimeter line is a closed ring structure, and the second part is also located on the near-middle side and / or far-middle side of the first support surface.

8. The shell-shaped dental instrument according to claim 1, characterized in that, The first outer perimeter line includes multiple curves, and the transitions between adjacent curves are smooth.

9. The shell-shaped dental instrument according to claim 1, characterized in that, The first outer peripheral line includes at least one recess and at least one protrusion, and when the first outer peripheral line includes multiple recesses or multiple protrusions, the recesses and protrusions are connected at intervals.

10. The shell-shaped dental instrument according to claim 9, characterized in that, The protrusion is positioned adjacent to the corresponding tip.

11. The shell-shaped dental instrument according to claim 1, characterized in that, The shell-shaped dental instrument also includes a connecting unit located on the occlusal surface of the orthodontic appliance. The connecting unit connects two of the support units. The interface between the connecting unit and the occlusal surface forms a second outer peripheral line, and the second outer peripheral line connects to the first outer peripheral line.

12. The shell-shaped dental instrument according to claim 11, characterized in that, The first peripheral line extends in the mesiodistal direction of the orthodontic appliance and connects to the second peripheral line, with a smooth transition between the first peripheral line and the second peripheral line.

13. The shell-shaped dental instrument according to claim 11, characterized in that, The second portion is located on the buccal side of the first support surface, and there is a gap between the area of ​​the first portion near the lingual side of the orthodontic appliance and the dividing line; or, the second portion is located on the lingual side of the first support surface, and there is a gap between the area of ​​the first portion near the buccal side of the orthodontic appliance and the dividing line.

14. The shell-shaped dental instrument according to claim 11, characterized in that, The second peripheral line includes a lingual line near the lingual surface of the orthodontic appliance and a buccal line near the buccal surface of the orthodontic appliance, wherein the lingual line is concave toward the buccal line and the buccal line is concave toward the lingual line.

15. The shell-shaped dental instrument according to claim 11, characterized in that, The second peripheral line includes a first end connecting one of the first peripheral lines and a second end connecting the other of the first peripheral lines. In the direction from the cheek surface of the orthodontic appliance to the tongue surface, the second peripheral line has a width that first decreases and then increases when transitioning from the first end to the second end.

16. The shell-shaped dental instrument according to claim 11, characterized in that, The shell-shaped dental instrument includes multiple support units and multiple connecting units that are spaced apart from each other.

17. The shell-shaped dental instrument according to claim 1, characterized in that, The support unit encloses a cavity, which is connected to the cavity body.

18. A shell-shaped dental instrument assembly, characterized in that, Includes a shell-shaped dental instrument and an opposing shell-shaped dental instrument as described in any one of claims 1-17, wherein one of the shell-shaped dental instrument and the opposing shell-shaped dental instrument is provided for the maxillary teeth and the other is provided for the mandibular teeth, wherein the opposing shell-shaped dental instrument includes an opposing appliance having a cavity for accommodating teeth, wherein when the maxilla and mandible are in an occlusal state, the support unit abuts against the occlusal surface of the opposing appliance, or the support unit abuts against an opposing support unit located on the occlusal surface of the opposing appliance.

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