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

Abstract

The utility model discloses a shell-shaped dental instrument which comprises an appliance with a cavity for accommodating teeth and a supporting unit, the occlusal surface of the appliance comprises a supporting surface corresponding to the occlusal surface of a certain rear tooth, and 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 sharp ends, the plurality of sharp ends respectively correspond to a plurality of tooth tips of the rear teeth, the supporting unit is located on the supporting surface, a first outer peripheral line is formed in a junction area of the supporting unit and the supporting surface, and the first outer peripheral line is located in the first supporting surface. The whole supporting unit is supported by the first supporting face, the first supporting face can play a stable supporting role on the supporting unit, then stable occlusal pressure is kept, it is guaranteed that the occlusal pressure is borne by the corresponding rear teeth, and the phenomena of sideslip and collapse of the supporting unit can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth correction, in particular to a shell-shaped dental instrument and a shell-shaped dental instrument component. Background Art

[0002] Malocclusion refers to the deformity of teeth, jaws, and craniofacial structure caused by congenital or acquired factors during the growth and development of children. It is mainly manifested as uneven teeth and misalignment of the upper and lower jaws (such as buck teeth and sunken mouth).

[0003] At present, 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. Utility Model Content

[0004] The utility model aims to provide a shell-shaped dental instrument, on which a supporting unit can maintain a stable occlusal pressure.

[0005] To achieve one of the purposes of the utility model described above, an embodiment of the utility model provides a shell-shaped dental device, comprising an orthodontic appliance having a cavity for accommodating teeth and a support unit, the occlusal surface of the orthodontic appliance comprising a support surface corresponding to the occlusal surface of a certain posterior tooth, the support surface comprising 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 corresponding to a plurality of tooth cusps of the posterior teeth, the support unit is located on the support surface, a first outer peripheral line is formed at a junction area between the support unit and the support surface, and the first outer peripheral line is located within the first support surface.

[0006] As a further improvement of an embodiment of the utility model, there is a gap between the first outer peripheral line and the separation line on the buccal or lingual side close to the orthodontic device, and the minimum value of the gap is not less than 2 mm in the direction from the buccal surface to the lingual surface.

[0007] As a further improvement of an implementation manner of the utility model, the first outer peripheral line is an annular closed structure, and the first outer peripheral line and the separation line are spaced apart.

[0008] As a further improvement of an implementation manner of the utility model, the first outer peripheral line includes multiple curves, and there is a smooth transition between adjacent curves.

[0009] As a further improvement of an embodiment of the utility model, 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 with intervals.

[0010] As a further improvement of an embodiment of the present invention, the end point of the protrusion is arranged adjacent to the corresponding tip.

[0011] As a further improvement of one embodiment of the utility model, the shell-shaped dental device also includes a connecting unit located on the occlusal surface of the orthodontic device, the connecting unit connects the two supporting units, the junction area between the connecting unit and the occlusal surface forms a second outer peripheral line, and the second outer peripheral line is connected to the first outer peripheral line.

[0012] As a further improvement of an implementation manner of the utility model, the first outer peripheral line extends to the separation line 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.

[0013] As a further improvement of an embodiment of the present invention, 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.

[0014] As a further improvement of an embodiment of the present invention, 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, and in the direction from the buccal surface of the orthodontic device to the lingual surface, 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.

[0015] As a further improvement of an embodiment of the utility model, 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.

[0016] As a further improvement of an embodiment of the present invention, the shell-shaped dental instrument includes a plurality of support units and a plurality of connection units which are connected one by one at intervals.

[0017] As a further improvement of an embodiment of the utility model, the support unit is surrounded to form a cavity, and the cavity is connected to the cavity body.

[0018] To achieve one of the purposes of the above-mentioned utility model, one embodiment of the utility model provides a shell-shaped dental instrument assembly, including the shell-shaped dental instrument and the mandibular shell-shaped dental instrument as described above, wherein one of the shell-shaped dental instrument and the mandibular shell-shaped dental instrument is arranged corresponding to the maxillary teeth, and the other is arranged corresponding to the mandibular teeth, and the mandibular shell-shaped dental instrument includes a mandibular orthodontic appliance and a guide portion located on the occlusal surface of the mandibular orthodontic appliance, and when in an occlusal state, the guide portion and the support unit cooperate with each other in the mesiodistal direction to realize horizontal movement of the maxillary teeth or the mandibular teeth.

[0019] Compared with the prior art, the beneficial effect of the present invention lies in that the entire support unit of one embodiment of the present invention is arranged corresponding to the first support surface, that is, the entire support unit is arranged corresponding to the central area of ​​the support surface. The advantage of such arrangement is that the entire support unit is supported by the first support surface, and the first support surface can provide stable support for the support unit, thereby maintaining a stable occlusal pressure to ensure that the occlusal pressure is borne by the corresponding posterior teeth, and can avoid the phenomenon of lateral sliding and collapse of the support unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a shell-shaped dental instrument according to one embodiment (first specific embodiment) of the present utility model;

[0021] Figure 2 It is a three-dimensional diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to one embodiment (first specific embodiment) of the utility model;

[0022] Figure 3 It is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to one embodiment (first specific embodiment) of the present invention;

[0023] Figure 4 is another schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to one embodiment (first specific embodiment) of the present invention;

[0024] Figure 5 is a schematic diagram of a shell-shaped dental instrument according to a second specific embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of a partial area of ​​a shell-shaped dental instrument according to a second specific embodiment of the utility model;

[0026] Figure 7 is a schematic diagram of a shell-shaped dental appliance corresponding to a single posterior tooth according to a second specific embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of a shell-shaped dental instrument assembly according to one embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0029] Combination Figures 1 to 4 , illustrates a shell-shaped dental instrument 100 according to an embodiment of the present invention.

[0030] The shell-shaped dental apparatus 100 comprises an appliance 10 having a cavity S for accommodating teeth and a support unit 20 , wherein each support unit 20 is disposed corresponding to a posterior tooth in the posterior tooth region.

[0031] The occlusal surface A1 of the orthodontic appliance 10 includes a supporting surface A11 corresponding to the occlusal surface of a certain posterior tooth, that is, each supporting 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.

[0032] 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 cusps of the posterior teeth respectively.

[0033] Here, the first supporting surface A111 is the central area of ​​the supporting surface A11. Figure 2 The second support surface A112 is the peripheral area of ​​the support surface A11, and the second support surface A112 corresponds to Figure 2 If the support unit 20 is arranged 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 occlusal pressure. If the support unit 20 is arranged corresponding to the second support surface 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.

[0034] 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 , which is located within the first support surface A111 , that is, the first outer peripheral line L1 does not exceed the separation line L.

[0035] That is to say, the entire support unit 20 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 support unit 20 from sliding sideways and collapsing.

[0036] 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 .

[0037] That is to say, 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 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 dividing line L. In this way, it can be ensured that the corresponding support unit 20 is located on the first support surface A111.

[0038] In a specific embodiment, in the direction from the buccal surface A1 toward the lingual surface A3, the minimum value of the gap is not less than 2 mm, that is, the minimum value of the first gap P1 is not less than 2 mm, and the minimum value of the second gap P2 is not less than 2 mm.

[0039] In this embodiment, the support unit 20 is surrounded to form a cavity S1 , and the cavity S1 is connected to the cavity body S.

[0040] Here, the appliance 10 may be an invisible appliance made of a polymer material, the cavity S has a geometric shape for repositioning the dentition from a current layout to a 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.

[0041] The support unit 20 forming the cavity S1 is a hollow structure, and 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 sideways and collapsing.

[0042] Of course, the shell-shaped dental apparatus 100 may further include a filling portion located in the cavity S1 , and the filling portion may enhance the strength of the supporting unit 20 and further prevent the supporting unit 20 from collapsing.

[0043] In this embodiment, the support unit 20 includes a first outer peripheral line L1 formed in the junction area with the support surface A11, an end face 21 away from the support surface A11, and a side face 22 connecting the end face 21 and the first outer peripheral line L1. At this time, the end face 21 and the side face 22 form a cavity S1.

[0044] The shape of the end surface 21 of the support unit 20 matches the shape of the occlusal surface of the opposing jaw.

[0045] Here, the "occlusal surface of the antagonist" can be the occlusal surface of the antagonist teeth, the occlusal surface of the antagonist orthodontic 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.

[0046] Combination Figure 2 In this embodiment, the end surface 21 of the support unit 20 is an irregular shape as an example, that is, the end surface 21 at this time is a non-planar structure.

[0047] In addition, the side surface 22 of the supporting unit 20 is perpendicular to a plane formed by a plurality of points on the first outer peripheral line L1 .

[0048] Here, since the first outer peripheral line L1 is located on the support surface A11 of the orthodontic device 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 characterized 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.

[0049] That is to say, at this time, the support unit 20 is arranged roughly perpendicular to the support surface A11 of the orthodontic device 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 it is not limited to this. In other embodiments, the support unit 20 can also be inclined relative to the support surface A11 to reduce the difficulty of demolding.

[0050] In this embodiment, the first outer peripheral line L1 includes multiple curved lines, and there is a smooth transition between adjacent curved lines.

[0051] Correspondingly, the side surface 22 is formed by a plurality of curved surfaces, and adjacent curved surfaces have a smooth transition.

[0052] That is to say, 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 sites 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.

[0053] In this embodiment, 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 connected one by one at intervals, that is, the first outer peripheral line L1 at this time is roughly a wavy structure.

[0054] 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, and the protrusion can further enhance the strength of the corresponding support unit 20.

[0055] 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.

[0056] 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 tooth.

[0057] In addition, the first outer peripheral line L1 is a symmetrical structure, and the symmetrical structure can enhance the force uniformity of the corresponding support unit 20 .

[0058] Two specific embodiments of the shell-shaped dental instrument are described below.

[0059] In the first specific embodiment, combined with Figures 1 to 4 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 and the separation line L are spaced apart.

[0060] That is to say, the support unit 20 at this time is an independent structure that is not connected to other structures, and 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.

[0061] Here, combined Figure 1 The annular closed structure formed by the first outer peripheral line L1 is roughly in the shape of a plum blossom.

[0062] in, Figure 1 The annular closed structure formed by the first outer peripheral line L1 at the 16th posterior tooth 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 with intervals, and the four protrusions have the same shape.

[0063] Figure 1 The annular closed structure formed by the first outer peripheral line L1 at the posterior tooth No. 14 shown is an axially symmetrical structure, and the symmetrical structure includes four protrusions and four recessed portions, and the four protrusions and four recessed portions are connected one by one at intervals, and 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 smaller, the size of the protrusion of the first outer peripheral line L1 in the mesiodistal direction is also relatively small.

[0064] In this specific embodiment, combined with Figure 3 The first outer edge line L1 is a ring-shaped closed structure. In all directions, there is a gap between the first outer edge line L1 and the separation line L, that is, the first outer edge line L1 is located in the absolute center area of ​​the first supporting surface A111.

[0065] Specifically, on the side close to the buccal surface A2 of the corrector 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and on the side close to the lingual surface A3 of the corrector 10, there is a second gap P2 between the first outer peripheral line L1 and the dividing line L. The minimum values ​​of the first gap P1 and the second gap P2 are both not less than 2 mm. In the mesiodistal direction of the corrector 10, there is also a gap between the first outer peripheral line L1 and the dividing line L, and the gap can also be set to a minimum value of not less than 2 mm.

[0066] Combination Figure 4 , compared to Figure 3 The first outer peripheral line L1, Figure 4 The first outer peripheral line L1 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. 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 an annular closed structure.

[0067] in addition, Figure 4 The first outer peripheral line L1 can still be regarded as being located in the central area of ​​the first support surface A111, and because 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.

[0068] Specifically, on the side close to the buccal surface A2 of the corrector 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and on the side close to the lingual surface A3 of the corrector 10, there is a second gap P2 between the first outer peripheral line L1 and the dividing line L. The minimum values ​​of the first gap P1 and the second gap P2 are not less than 2 mm. In the mesiodistal direction of the corrector 10, the first outer peripheral line L1 coincides with the dividing line L without any gap.

[0069] Combination Figures 5 to 7 , is a schematic diagram of a shell-shaped dental instrument 100 according to a second specific embodiment. For ease of description, identical or similar structures are numbered identical or similarly.

[0070] 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 device 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 connects the first outer peripheral line L1.

[0071] 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.

[0072] It should be noted that at this time, on the side close to the buccal surface A2 of the corrector 10, there is a first gap P1 between the first outer peripheral line L1 and the dividing line L, and on the side close to the lingual surface A3 of the corrector 10, there is a second gap P2 between the first outer peripheral line L1 and the dividing line L. The minimum values ​​of the first gap P1 and the second gap P2 are not less than 2 mm. In the mesiodistal direction of the corrector 10, the first outer peripheral line L1 extends and contacts the dividing line L without any gap.

[0073] The occlusal surface A1 includes a connecting surface A12 connecting two adjacent supporting surfaces A11. The connecting surface A12 actually connects the mesial end of one of the second supporting surfaces A112 and the distal end of the other second supporting 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.

[0074] It can be understood that since the support unit 20 is connected to the first support surface A111, the connection unit 30 connecting two adjacent support units 20 actually connects 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.

[0075] Combination Figure 6 and Figure 7 The first outer edge line L1 extends to the separation line L and connects to the second outer edge line L2, and there is a smooth transition between the first outer edge line L1 and the second outer edge line L2.

[0076] It should be noted that at this time, the second outer edge line L2 is connected to the proximal end or the distal end of the first outer edge line L1, and the second outer edge L2 extends to cover the connecting surface A12 and the second supporting surface A112 located on both sides of the connecting surface A12. The smooth transition between the first outer edge line L1 and the second outer edge 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.

[0077] In this specific 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 .

[0078] 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 recessed toward the buccal line L22, and the buccal line L22 is recessed toward the lingual line L21.

[0079] 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".

[0080] 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.

[0081] Here, in the direction from the buccal surface of the posterior teeth toward 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 A11, and the gap between the adjacent teeth provides support for the connecting unit 30 located on the second support surface A12. In other words, 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 (the occlusal surface of the posterior teeth or the gap between the adjacent teeth) below to provide support for the support unit 20 and the connecting unit 30, thereby avoiding deformation and collapse of the support unit 20 and the connecting unit 30 due to the lack of tooth support below.

[0082] In addition, in the direction from the buccal surface A2 of the appliance 10 toward the lingual surface A3, the first outer peripheral line L1 has a first width d1, and the second outer peripheral line L2 has a second width d2.

[0083] 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 first support surface A11, and the second width d2 is relatively small to correspond to the relatively narrow connection unit 30 located on the second support surface A12. 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 customized according to the posterior teeth of different patients or different posterior teeth of the same patient.

[0084] 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.

[0085] 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 a lack of 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 spaced apart), the demolding difficulty will be greatly increased.

[0086] While considering the difficulty of process and demoulding as well as making the second width d2 as narrow as possible, the minimum value of the second width d2 is controlled to be no less than 0.5 mm in this specific embodiment. Preferably, the minimum value of the second width d2 is in the range of 1 mm-4 mm.

[0087] 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.

[0088] 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.

[0089] Each connection unit 30 has a tendency to shrink inward, and the shrinkage degree of the connection unit 30 at each second support surface A12 is related to the width of the adjacent tooth gap corresponding to the second support surface A12.

[0090] It can be seen that the connection unit 30 at the second support surface A12 is also customized corresponding to the posterior teeth of different patients or different posterior teeth of the same patient.

[0091] 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 segment and the trough segment 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 dividing 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.

[0092] Combination Figure 8 An embodiment of the present invention 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.

[0093] 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 one is disposed corresponding to the mandibular teeth.

[0094] The mandibular shell-shaped dental device 200 includes a mandibular appliance 201 and a guide portion 203 located on the 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.

[0095] exist Figure 8 In the figure, 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 integral 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 integral structure formed by the supporting unit 20 and the connecting unit 30 abuts against the distal end of the guide portion 203 to realize horizontal movement of the mandibular teeth, that is, the retraction of the mandibular teeth is realized at this time.

[0096] Of course, in other embodiments, 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 mesial end of the guide portion 203 abut against each other to achieve the advancement of the mandibular teeth.

[0097] 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 matching of the guide portion 203, a friction structure or a concave-convex matching structure may be formed at the contact point between the two.

[0098] To sum up, the entire support unit 20 of the utility model 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 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 lateral sliding and collapse of the support unit 20.

[0099] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0100] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A shell-shaped dental instrument, characterized in that: It includes an orthodontic appliance having a cavity for accommodating teeth and a support unit, the occlusal surface of the orthodontic 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 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, the junction area between the support unit and the support surface forms a first outer peripheral line, and 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: On the buccal or lingual side close to the orthodontic appliance, there is a gap between the first outer peripheral line and the separation line, and the minimum value of the gap in the direction from the buccal surface to the lingual surface is not less than 2 mm.

3. The shell-shaped dental instrument according to claim 1, 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.

4. The shell-shaped dental instrument according to claim 1, characterized in that: The first outer peripheral line includes multiple curves, and adjacent curves have smooth transitions.

5. The shell-shaped dental instrument according to claim 1, 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.

6. The shell-shaped dental instrument according to claim 5, characterized in that: The end points of the projections are disposed adjacent to the corresponding tips.

7. The shell-shaped dental instrument according to claim 1, 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.

8. The shell-shaped dental device according to claim 7, characterized in that: The first outer peripheral line extends to the separation line and connects to the second outer peripheral line, and the first outer peripheral line and the second outer peripheral line have a smooth transition.

9. The shell-shaped dental instrument according to claim 7, 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.

10. The shell-shaped dental instrument according to claim 7, 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.

11. The shell-shaped dental instrument according to claim 7, 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.

12. The shell-shaped dental device according to claim 7, 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.

13. The shell-shaped dental device according to claim 1, characterized in that: The support unit is surrounded to form a cavity, and the cavity is connected to the cavity body.

14. A shell-shaped dental instrument assembly, characterized in that: It includes a shell-shaped dental instrument and an opposing shell-shaped dental instrument as described in any one of claims 1 to 12, wherein one of the shell-shaped dental instrument and the opposing shell-shaped dental instrument is arranged corresponding to maxillary teeth, and the other is arranged corresponding to mandibular teeth, and the opposing shell-shaped dental instrument includes an opposing jaw appliance and a guide portion located on the occlusal surface of the opposing jaw appliance, and when in an occlusal state, the guide portion and the support unit cooperate with each other in the mesiodistal direction to realize horizontal movement of the maxillary teeth or the mandibular teeth.

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