Shell dental appliance and shell dental appliance kit

Abstract

The application discloses a shell-shaped dental appliance and a shell-shaped dental appliance set comprising at least one shell-shaped dental appliance. The shell-shaped dental appliance comprises a shell-shaped body provided with a plurality of tooth receiving cavities, and the shell-shaped body is provided with a screen. The screen comprises a blocking part protruding in a distal tooth direction arranged on a labial side and / or a buccal side, and a contact part arranged in connection with the blocking part. When worn, the blocking part is in contact with the labial muscle and / or the buccal muscle, and the force applied by the labial muscle and / or the buccal muscle to the blocking part is at least partially transmitted to the corresponding gingiva through the contact part. The shell-shaped dental appliance of the application avoids the problem of inhibition of tooth growth by the labial muscle and / or the buccal muscle during the treatment process. The pressure applied by part of the labial muscle and / or the buccal muscle is transmitted to the corresponding gingiva through the contact part, the retention force of the shell-shaped dental appliance on the gingiva is increased, the treatment effect is improved, and the treatment period is shortened.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tooth correction, more precisely to the technical field of bracket-free invisible correction, and particularly refers to a shell-shaped dental instrument and a shell-shaped dental appliance set. BACKGROUND

[0002] Compared with traditional orthodontic diagnosis and treatment technology, bracket-free invisible correction technology is chosen by more and more people due to its comfort and aesthetic advantages. However, the existing invisible correction has certain limitations for early correction of deciduous dentition, mixed dentition and permanent dentition, mainly because the patients are young, and in addition to the problem of tooth alignment, most patients still have the development of the length, width and height of the upper and lower jaw bones; differential growth of the lower jaw; determination of the position of the temporomandibular joint related to the function of craniofacial nerves and muscles and occlusion; and the development of facial soft tissues to form a coordinated and stable functional relationship with the jaw bones. In addition to tooth alignment, functional correction is also needed during the treatment process.

[0003] Traditional functional appliances need to be manually bent to make a bracket with steel wire, coated with self-curing plastic, and then polished according to the oral structure of the patient. The whole process is time-consuming and laborious and has a high production cost. When the patient first wears the functional appliance, the volume of the functional appliance is large, which affects pronunciation and chewing after being worn, and the swallowing function needs a long time to adapt. At the same time, the functional appliance also affects the secretion and flow of saliva in the patient's mouth during wearing, thereby affecting the self-cleaning and remineralization of the teeth, changing the patient's oral microecology and affecting oral health.

[0004] Currently, in clinical practice, patients need to wear bracket-free invisible correction appliances in addition to the existing functional appliances such as buccal screens and lip guards to adjust the perioral muscle function due to the problem that the developing dentition is easily affected by abnormal perioral muscle function. In the existing technology, patients generally need to wear bracket-free invisible correction appliances during the day to align the teeth, and wear functional appliances at night to promote the remodeling of the alveolar bone and the reconstruction of the maxillofacial structure. However, in general, patients who need to align their teeth need to wear bracket-free invisible correction appliances for at least 20 hours a day to achieve the treatment effect, and functional appliances need to be worn for at least 10 hours a day to achieve the treatment effect. Therefore, in the existing technology, it is impossible to simultaneously align the teeth and correct the muscle function, which will inevitably prolong the entire treatment period and increase the number of diagnoses and treatments, thereby increasing the treatment cost for the patient.

[0005] Therefore, the present application provides a solution to the above problems. SUMMARY

[0006] The technical problem solved by the present application is to overcome the defects in the prior art and provide a new shell-shaped dental instrument with muscle function correction and a shell-shaped dental appliance set.

[0007] To achieve the above object, the technical scheme adopted by the present application is as follows:

[0008] A shell-shaped dental appliance comprises a shell-shaped body provided with a plurality of tooth receiving cavities, the shell-shaped body is provided with a screen, the screen comprises a blocking part protruding in the distal direction of the teeth arranged on the labial side and / or the buccal side, and a contact part arranged in connection with the blocking part, when worn, the blocking part is in contact with the labial muscle and / or the buccal muscle, and the force exerted by the labial muscle and / or the buccal muscle on the blocking part is at least partially transmitted to the corresponding gingiva through the contact part. The contact part transmits part of the force exerted by the labial muscle and / or the buccal muscle to the corresponding gingiva, thereby increasing the retention force of the shell-shaped dental appliance on the gingiva and solving the problem that the shell-shaped dental appliance is easily detached from the teeth due to small dentition of the patient.

[0009] As a preferred, the tooth receiving cavity has a geometry that moves at least part of the received teeth from a first position to a second position.

[0010] As a preferred, the contact part has a structure that is in stable contact with the corresponding gingiva when worn.

[0011] As a preferred, the shape of the contact part near the gingiva is basically consistent with the shape of the corresponding gingiva, so that the contact part is more closely attached to the corresponding gingiva.

[0012] As a preferred, the blocking part is formed by protruding in the distal direction of the teeth from the labial side and / or the buccal side of at least one tooth receiving cavity.

[0013] As a preferred, the inner surface of the blocking part is at least partially not in contact with the outer side of the tooth adjacent to the inner surface of the blocking part when worn.

[0014] As a preferred, the blocking part is protruding in the distal direction of the teeth and arranged at the gingiva of the labial side and / or the buccal side of the shell-shaped body.

[0015] As a preferred, the blocking part and the contact part are in an integrated structure or a separate structure.

[0016] As a preferred, when the blocking part and the contact part are in an integrated structure, the blocking part is a bubble structure protruding in the distal direction of the teeth.

[0017] As a preferred, the cross-sectional shape of the blocking part in the direction of the long axis of the tooth is one of an ellipse, a water drop shape, a polygon, or a combination of the above shapes.

[0018] As a preferred, the inside of the blocking part is provided with a filler for enhancing the strength of the blocking part.

[0019] As a preferred, when the blocking part and the contacting part are in a split structure, the blocking part can be fixed on the shell body by any one of bonding, riveting, welding.

[0020] As a preferred, when the blocking part and the contacting part are in a split structure, the blocking part and the contacting part can be made of the same material or different material.

[0021] As a preferred, when the blocking part and the contacting part are made of the same material, the material thickness of the blocking part is greater than that of the contacting part.

[0022] As a preferred, when the blocking part and the contacting part are made of different material, the elastic modulus of the material of the blocking part is greater than that of the contacting part.

[0023] As a preferred, the blocking part is a solid protrusion.

[0024] As a preferred, the maximum height of the blocking part protruding to the distal tooth direction is 3mm-8mm.

[0025] As a preferred, the length of the blocking part in the dental arch direction is the width of 1-6 teeth.

[0026] As a preferred, the length of the blocking part in the dental arch direction is the width of the whole dental arch.

[0027] As a preferred, any one or more of the proximal surface, the distal surface, the mesial surface and the distal surface of the blocking part is provided with at least one reinforcing member.

[0028] As a preferred, the reinforcing member is integrally formed with the blocking part, and the reinforcing member is a bubble structure with a surface curvature exceeding that of the blocking part.

[0029] As a preferred, the reinforcing member and the blocking part are in a split structure, and the reinforcing member is fixedly installed on the blocking part.

[0030] As a preferred, the reinforcing member is arranged on the blocking part in the gingival jaw direction or the mesial-distal direction.

[0031] As a preferred, the shell body is further provided with an expansion device used together with the blocking part.

[0032] As a preferred, the expansion device and the shell body are in an integral structure, and the expansion device is connected to the lingual side of the left and right posterior tooth regions of the shell body at or adjacent to the gingival margin.

[0033] As a preferred, the expansion device and the shell body are in a split structure, and the expansion device is detachably installed on the shell body.

[0034] A shell-shaped dental appliance set comprises a first shell-shaped body and a second shell-shaped body, the first shell-shaped body is any one of the shell-shaped dental appliances described above, the second shell-shaped body is provided with a plurality of tooth receiving cavities, and the first shell-shaped body and the second shell-shaped body are used in cooperation.

[0035] Preferably, the second shell-shaped body is any one of the shell-shaped dental appliances described above.

[0036] Preferably, when the position of the screen on the first shell-shaped body coincides with the position of the screen on the second shell-shaped body on the long axis of the tooth, the length of the blocking part on the first shell-shaped body and the length of the blocking part on the second shell-shaped body in the direction of the long axis of the tooth are both not more than the jaw plane.

[0037] The shell-shaped dental appliance and the shell-shaped dental appliance set provided by the present application can bring at least one of the following beneficial effects:

[0038] 1. The screen on the shell-shaped dental appliance is provided with a blocking part and a contact part, wherein the blocking part blocks the contact of the lips, buccal muscles and corresponding dentition, thereby reducing the inhibition of buccal muscles on the lateral growth of teeth and the inhibition of lips on the forward growth of teeth, and stimulating the transverse or longitudinal development of teeth; the force exerted by the lips and / or buccal muscles on the blocking part is at least partially transmitted to the corresponding gums through the contact part, thereby enhancing the retention force of the shell-shaped dental appliance on the gums and solving the problem that the shell-shaped dental appliance is easily detached from the teeth when the teeth of the patient are small.

[0039] 2. Compared with the traditional functional appliance, the shell-shaped dental appliance of the present application sets a screen on the basis of the existing shell-shaped dental appliance and organically integrates the two, so that the shell-shaped dental appliance has the function of adjusting the vestibular area and perioral tissue while aligning the dentition, thereby improving the treatment comfort of the patient and shortening the treatment period.

[0040] 3. The shell-shaped dental appliance of the present application is further provided with an arch expansion device used in cooperation with the screen, the deformation of the arch expansion device induces the buccal side expansion of the midpalatal suture bone of the maxilla, and the screen on the buccal side of the shell-shaped dental appliance provides sufficient space for the buccal movement of teeth by virtue of the structure protruding towards the distal teeth, thereby avoiding the resistance of the buccal muscles to the dental arch during arch expansion.

[0041] 4. The shell-shaped dental appliance set of the present application comprises shell-shaped dental appliances worn on the upper and lower jaws, at least one of which is provided with a screen, so that the upper and lower dentitions can grow normally to the maximum in the length, width and height directions while being aligned. The number of steps of tooth treatment is reduced, and the treatment period is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above features, technical characteristics, advantages and implementation manners will be further described in a clear and understandable manner in combination with the drawings.

[0043] Figure 1 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0044] Figure 2 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application; Figure 1 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0045] Figure 3 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0046] Figure 4 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0047] Figure 5 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application; Figure 4 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0048] Figure 6 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0049] Figure 7 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0050] Figure 8 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0051] Figure 9 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0052] Figure 10 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0053] Figure 11 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application; Figure 10 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application;

[0054] Figure 12 Schematic view of an embodiment of the shell-shaped dental instrument according to the present application. DETAILED DESCRIPTION

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0056] Referring to Figure 1 and Figure 2 The present application includes a shell-shaped dental appliance, wherein the shell-shaped dental appliance comprises a shell-shaped body 100 provided with a plurality of tooth receiving cavities, which wrap the whole tooth 200 from the crown to the gum margin. The shell-shaped body 100 is also provided with a screen 101, which comprises a contact portion 103 and a blocking portion 102 integrally formed with the shell-shaped body 100. The blocking portion 102 protrudes from the labial side, buccal side or labial-buccal side of the shell-shaped body 100 towards the distal tooth, pries open the labial-buccal mucosa, and blocks the contact between the labial muscle, buccal muscle or labial-buccal muscle and the corresponding tooth, thereby reducing the inhibition of tooth growth by the labial muscle, buccal muscle or labial-buccal muscle, and stimulating the transverse or longitudinal development of the corresponding tooth. The contact portion 103 is arranged in connection with the blocking portion 102, and in use, the contact portion 103 contacts the corresponding gum 300 provided with the screen 101, and the contact portion 103 has a structure that stably contacts the corresponding gum 300. Specifically, the proximal gingival surface of the contact portion 103 can be a curved surface structure, a flat surface structure or a structure with a convex point. Preferably, a curved surface structure that substantially matches the shape of the corresponding gum 300 is adopted, which can make the contact portion 103 completely fit and cover the corresponding gum 300, thereby enhancing the control of the shell-shaped dental appliance on the corresponding gum 300, and solving the problem that the shell-shaped dental appliance is easily detached from the tooth due to the small size of the patient's tooth, such as the deciduous teeth of children or the early mixed dentition of adolescents. Specifically, in use, the blocking portion 102 blocks the force exerted by the labial muscle, buccal muscle or labial-buccal muscle on the tooth to inhibit the growth and development of the tooth, and the blocking portion 102 is arranged in connection with the contact portion 103, thereby transferring part of the pressure of the labial muscle, buccal muscle or labial-buccal muscle to the corresponding gum 300 in contact with the contact portion 103, thereby enhancing the control of the shell-shaped dental appliance on the corresponding gum 300 during wearing, and making it not easy to be detached from the tooth. In addition, it should be noted that the tooth receiving cavities can have the function of aligning the teeth. Specifically, the tooth receiving cavities have a geometric structure that moves at least part of the received teeth from a first position to a second position. The first position can be the initial position of the teeth in any step of the treatment, and the second position is the target position of the teeth in the step. Of course, the tooth receiving cavities can also not have the function of aligning the teeth.

[0057] In some embodiments, reference is made to Figures 3-5As shown, the blocking portion 102 is formed by protruding the labial side and / or the buccal side of at least one tooth receiving cavity in the distal direction. Preferably, the blocking portion 102 is formed by protruding the labial side or the buccal side of the tooth receiving cavity in the distal direction, and the blocking portion 102 is integrally formed with the shell body 100, that is, the blocking portion is integrally formed with the shell body. When the blocking portion 102 is protruded in the distal direction from one or more tooth receiving cavities, the blocking portion 102 can be formed to protrude in the distal direction on either side of the two buccal sides or on both sides according to different treatment plans. Referring to Figure 3 the shell dental appliance shown in FIG. 1 1, the blocking portion 102 is formed by protruding one or more tooth receiving cavities in the distal direction (the dashed portion is the shape of the tooth receiving cavity when not protruding in the distal direction), and after the patient wears the shell dental appliance, the inner surface of the blocking portion 102 does not contact the outer side of the tooth adjacent to the inner surface of the blocking portion 102, thereby avoiding the blocking portion 102 from exerting an undesirable force on the tooth. The blocking portion 102 has a barrier in the middle, which can increase the strength of the buccal side of the blocking portion 102, and the blocking portion 102 is less likely to deform after being worn. Referring to Figure 4 the shell dental appliance shown in FIG. 1 1, the blocking portion 102 is formed by protruding one or more tooth receiving cavities in the distal direction (the dashed portion is the shape of the tooth receiving cavity when not protruding in the distal direction), and after the patient wears the shell dental appliance, the inner surface of the blocking portion 102 does not contact the outer side of the tooth adjacent to the inner surface of the blocking portion 102, thereby avoiding the blocking portion 102 from exerting an undesirable force on the tooth. The blocking portion 102 has a barrier in the middle, which can increase the strength of the buccal side of the blocking portion 102, and the blocking portion 102 is less likely to deform after being worn. Referring to

[0058] Referring to Figure 5 the shell dental appliance shown in FIG. 1 1, the blocking portion 102 is integrally formed with the shell body 100, and the surface of the blocking portion 102 adjacent to the buccal muscle can be provided with a smooth curved surface, so that the patient does not have a strong foreign body sensation after wearing, and the comfort of the patient is improved. In this embodiment, the tooth receiving cavity with the blocking portion 102 has a weak control ability on the corresponding tooth, and the tooth receiving cavity in this area has a weak orthodontic force on the tooth, but the processing difficulty is smaller and the demolding is easier during the production process, especially when the shell dental appliance 100 is produced by using the hot stamping film technology. Referring to Figure 6 the shell dental appliance shown in FIG. 1 1, in order to strengthen Figure 5 the control ability of the tooth receiving cavity or the shell dental appliance on the corresponding tooth in the embodiment, the blocking portion 102 can contact the crown area a Figure 6 of the tooth adjacent to the blocking portion 102 (the area indicated by the arrow in FIG. 1 1 ), so that the area of the tooth receiving cavity wrapped around the crown of the corresponding tooth is increased, thereby increasing the control ability of the tooth receiving cavity or the shell dental appliance on the corresponding tooth while maintaining the blocking portion 102 to block the buccal muscle.

[0059] In other embodiments, referring to Figure 7As shown, the barrier 102 is protruded to the distal direction at the gum of the labial and / or buccal side of the shell body 100, covering part of the tooth receiving cavity adjacent to the surface of the labial and / or buccal muscle and part of the gum surface. Compared with the structure in which the barrier 102 is directly protruded to the distal direction from the tooth receiving cavity, the feature of this structure is that the tooth receiving cavity corresponding to the barrier 102 has a larger wrapping area for the tooth, and the overall control of the shell dental appliance on the dentition is stronger, and the setting of the barrier 102 does not affect the correction force of the shell dental appliance on the corresponding tooth. The barrier 102 and the contact part 103 can be an integral structure or a split structure. When the barrier 102 and the contact part 103 are an integral structure, that is, the barrier and the shell body 100 are an integral structure. The barrier 102 is a bubble structure protruded to the distal direction. The cross-sectional shape of the bubble in the tooth long axis direction is one of an ellipse, a water drop shape, a polygon, or one of a combination of the above shapes. Preferably, it is an ellipse, a water drop shape, or a combination of the two, and the smooth curved surface structure can make the barrier 102 more fit the labial and / or buccal muscle of the patient, reduce the discomfort of the patient. At the same time, it can also disperse part of the pressure applied by the labial and / or buccal muscle, so that the pressure applied by the labial and / or buccal muscle on the barrier 102 will not be excessively transmitted to the corresponding tooth.

[0060] The inside of the barrier 102 can be provided with a filler for enhancing the strength and / or rigidity of the barrier 102, preventing the barrier 102 from being deformed due to excessive pressure applied by the labial and / or buccal muscle, so that the barrier 102 loses the function of isolating the labial and / or buccal muscle and the corresponding tooth, and the filler further ensures the strength of the barrier 102, so that the corresponding tooth has sufficient space for transverse or longitudinal growth. The filler can be a glass resin material meeting the oral medical standard.

[0061] In other embodiments, when the barrier 102 and the contact part 103 are a split structure, the contact part 103 and the shell body 100 are integrally formed. The barrier 102 can be fixed on the shell body 100 by any one of bonding, riveting, and welding, and preferably, an adhesive is used to fix the barrier 102 on the shell body 100, which is simpler in production process and beneficial to large-scale production. When the barrier 102 and the contact part 103 are of the same material, the barrier 102 can increase the rigidity by increasing the thickness. When the barrier 102 and the contact part 103 are not of the same material, the barrier 102 can be made of a material having a larger elastic modulus than that of the contact part 103 to increase the rigidity, such as metal, ceramic, or other polymer materials.

[0062] In other embodiments, referring to Figure 8As shown, the screen 101 arranged on the labial side has a maximum height L1 of 3mm-8mm of the blocking portion protruding in the distal direction. The thickness of the blocking portion itself can be set to 2.5mm-3.0mm, and the gap between the inner surface of the blocking portion adjacent to the outer surface of the tooth and the outer surface of the corresponding tooth is set to be at least 3.0mm, which aims to reduce the inhibitory effect of the labial muscle and / or buccal muscle on tooth growth. The length of the screen 101 in the dental arch direction is 1-6 teeth wide or the entire width of the dental arch, and the screen 101 can also be arranged on the labial side, buccal side or labial-buccal side (as shown in FIG. 9), wherein it can be arranged on both sides or on one side when arranged on the buccal side. The screen 101 arranged on the labial side can eliminate part of the pressure of the lips on the jaw, while pulling the local alveolar bone periosteum and stimulating the alveolar bone labial bone deposition. Secondly, arranging the screen 101 on the labial side and the buccal side at the same time can also pull the periosteum at the vestibular groove and stimulate the growth and development of the corresponding alveolar bone.

[0063] In other embodiments, at least one reinforcing member 104 is arranged on any one or more of the proximal tooth surface, distal tooth surface, mesial surface and distal surface of the blocking portion 102 to reinforce the rigidity of the blocking portion 102. It is preferred to be arranged on any surface except the distal tooth surface to avoid the contact of the reinforcing member 104 with the labial muscle and / or buccal muscle, and to improve the comfort of the patient when wearing the shell-shaped dental appliance. The reinforcing member 104 can be arranged in the gingival direction or the mesial-distal direction. The reinforcing member 104 can be an integral structure or a separate structure with the blocking portion 102. When the reinforcing member 104 is an integral structure with the blocking portion 102, as shown in FIG. 10, the reinforcing member 104 is arranged on the blocking portion 102 in the form of a reinforcing rib. Figure 10 and Figure 11 As shown, the reinforcing member 104 is a bubble structure with a surface curvature exceeding that of the blocking portion 102, which can be convex outward or concave inward, and the strength of the blocking portion 102 is enhanced by increasing the surface area of the blocking portion 102 to prevent it from deforming under the pressure of the labial muscle and / or buccal muscle. The bubble structure can be a plurality of convex or concave dot structures or one or more convex or concave elliptical structures. In addition, the reinforcing member can be a reinforcing rib pasted on any one or more of the proximal tooth surface, distal tooth surface, mesial surface and distal surface, which can also increase the rigidity of the blocking portion 102, which will not be described here.

[0064] In other embodiments, as shown in FIG. 11, the reinforcing member 104 is arranged on the blocking portion 102 in the form of a reinforcing rib, and the reinforcing rib is arranged on the blocking portion 102 in the form of a reinforcing rib. Figure 12The shell-shaped dental appliance further comprises an arch expansion device 105 on the shell-shaped body 100, which is used in cooperation with the blocking part 102. The arch expansion device 105 is in one-piece structure with the shell-shaped body 100, and the two ends of the arch expansion device 105 are connected to the gum edge or adjacent to the gum edge of the lingual side of the posterior dental area on the left and right sides of the first shell-shaped body 100. Alternatively, the arch expansion device 105 is in separate structure with the shell-shaped body 100, and the arch expansion device 105 is detachably mounted on the shell-shaped body 100. The arch expansion device 105 is generally suitable for being worn on the shell-shaped dental appliance of the upper jaw, and by applying horizontal force to one or more teeth in the posterior dental area, the un-closed midpalatal suture is stretched, the new bone deposition in the suture is stimulated, the jaw bone growth is stimulated, the dental arch width is increased, and the dental arch shape is improved. The screen eliminates the reverse inhibitory effect of part of the labial muscle and / or buccal muscle on the corresponding teeth during the expansion of the arch, so that a better expansion effect is achieved. Without the screen, the expansion of the arch is often affected by the reverse inhibitory effect of the buccal muscle on the teeth, resulting in that the expansion effect is not obvious and the expected treatment effect is not achieved. The shell-shaped dental appliance in the embodiment can achieve obvious expansion effect by setting the screen structure on the shell-shaped appliance during the expansion of the arch, and the pressure applied by the buccal muscle on the corresponding teeth is reduced, which has great significance.

[0065] The application further provides a shell-shaped dental appliance set, which comprises a first shell-shaped body and a second shell-shaped body. The first shell-shaped body is a shell-shaped dental appliance in any of the above embodiments. The second shell-shaped body is provided with a plurality of tooth receiving cavities, and the first shell-shaped body and the second shell-shaped body are used in cooperation. The second shell-shaped body can also be a shell-shaped dental appliance in any of the above embodiments. The first shell-shaped body and the second shell-shaped body can be provided with screens on the labial side, the buccal side, and the labial-buccal side. When the screen provided on the first shell-shaped body and the screen provided on the second shell-shaped body are located at the same position on the long axis of the tooth, the length of the blocking part on the first shell-shaped body and the length of the blocking part on the second shell-shaped body in the direction of the long axis of the tooth do not exceed the jaw plane. The purpose is that the blocking part provided on the first shell-shaped body and the blocking part provided on the second shell-shaped body do not affect each other during the cooperation of the patient, and the accuracy of the treatment is improved.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above description is only the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A shell-shaped dental instrument comprising a shell-shaped body provided with a plurality of tooth-receiving cavities, characterized in that, The shell-shaped body is provided with a screen, which comprises a blocking part protruding in the distal direction of the labial and / or buccal side, and a contact part connected with the blocking part, the contact part having a structure which is in stable contact with the corresponding gingiva when worn, the blocking part being in contact with the labial and / or buccal muscle when worn, the force exerted by the labial and / or buccal muscle on the blocking part being at least partially transmitted to the corresponding gingiva through the contact part, wherein The blocking part is formed by the protrusion of the labial and / or buccal side of at least one tooth receiving cavity in the distal direction; or The blocking part is protruding in the distal direction of the gingiva of the labial and / or buccal side of the shell-shaped body.

2. The shell-like dental instrument of claim 1, wherein, The tooth receiving cavity has a geometry which enables at least part of the received tooth to move from a first position to a second position.

3. The shell-like dental instrument of claim 1, wherein, The shape of the proximal surface of the contact part substantially matches the shape of the corresponding gingiva.

4. The shell-like dental instrument of claim 1, wherein, When worn, the inner surface of the blocking part is at least partially not in contact with the outer surface of the tooth adjacent to the inner surface of the blocking part.

5. The shell-like dental instrument of claim 1, wherein, When the blocking part is protruding in the distal direction of the gingiva of the labial and / or buccal side of the shell-shaped body, the blocking part and the contact part are in an integral structure or a separate structure.

6. The shell-like dental instrument of claim 5, wherein, When the blocking part and the contact part are in an integral structure, the blocking part is a hollow structure protruding in the distal direction.

7. The shell-like dental instrument of claim 6, wherein, The cross-sectional shape of the blocking part in the direction of the long axis of the tooth is one of an ellipse, a teardrop, a polygon, or a combination of the above shapes.

8. The shell-like dental instrument of claim 7, wherein, The inside of the blocking part is provided with a filler which enhances the strength of the blocking part.

9. The shell-like dental instrument of claim 5, wherein, When the blocking part and the contact part are in a separate structure, the blocking part can be fixed on the shell-shaped body by any one of bonding, riveting, and welding.

10. The shell-like dental instrument of claim 5, wherein, When the blocking part and the contact part are in a separate structure, the materials of the blocking part and the contact part are consistent or inconsistent.

11. The shell-like dental instrument of claim 10, wherein, When the materials of the blocking part and the contact part are consistent, the material thickness of the blocking part is greater than that of the contact part.

12. The shell-like dental instrument of claim 10, wherein, When the materials of the blocking part and the contact part are inconsistent, the elastic modulus of the material of the blocking part is greater than that of the contact part.

13. The shell-like dental instrument of claim 10, wherein, The blocking part is a solid protrusion.

14. The shell-like dental instrument of claim 1, wherein, The maximum height of the protrusion of the blocking part in the distal direction is 3-8 mm.

15. The shell-like dental instrument of claim 1, wherein, The length of the blocking part in the direction of the dental arch is the width of 1-6 teeth.

16. The shell-like dental instrument of claim 1, wherein, The length of the blocking part in the direction of the dental arch is the width of the entire dental arch.

17. The shell-like dental instrument of claim 1, wherein, Any one or more of the proximal surface, the distal surface, the mesial surface, and the distal surface of the blocking part is provided with at least one reinforcing member.

18. The shell-like dental instrument of claim 17, wherein, The reinforcing member is integrally formed with the blocking part, and the reinforcing member is a hollow structure with a surface curvature greater than that of the blocking part.

19. The shell-like dental instrument of claim 17, wherein, The reinforcing member and the blocking part are in a separate structure, and the reinforcing member is fixedly installed on the blocking part.

20. The shell-like dental instrument of any of claims 17-19, wherein, The reinforcing member is arranged on the blocking part in the direction of the gingiva or the mesial-distal direction.

21. The shell-like dental instrument of claim 1, wherein, The shell-shaped body is further provided with an expansion device used together with the blocking part.

22. The shell-like dental instrument of claim 21, wherein, The expansion device and the shell-shaped body are in an integral structure, and the expansion device is connected to the gingival margin or the adjacent gingival margin of the lingual side of the posterior dental area of the left and right sides of the shell-shaped body.

23. The shell-like dental instrument of claim 21, wherein, The arch expander is detachably mounted on the shell-shaped body.

24. A kit of shell-like dental appliances comprising a first shell-like body and a second shell-like body, characterized in that, The first shell-shaped body is the shell-shaped dental appliance of any one of claims 1-23, and the second shell-shaped body is provided with a plurality of tooth receiving cavities.

25. The shell dental appliance kit of claim 24, wherein, The second shell-shaped body is the shell-shaped dental appliance of any one of claims 1-23.

26. The shell dental appliance kit of claim 25, wherein, When the screens on the first shell-shaped body and the second shell-shaped body are in the same position on the long axis of the teeth, the lengths of the blocking portions on the first shell-shaped body and the second shell-shaped body in the direction of the long axis of the teeth are not more than the jaw plane.

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