Shell-shaped dental instrument and dental orthodontic system
Patent Information
- Authority / Receiving Office
- ES · ES
- Patent Type
- Utility models
- Current Assignee / Owner
- SHANGHAI SMARTEE DENTI TECH CO LTD
- Filing Date
- 2023-05-12
- Publication Date
- 2026-08-07
AI Technical Summary
When existing dental orthodontic devices are used to correct mandibular retrusion, deep overbite, and deep overbite, the commonly used maxillary slope guides and Twin-Block appliances have retention problems and poor comfort, are large in size, and have poor aesthetics.
Design a shell-shaped dental instrument, which includes a first guide part and a support part provided in the palatal area. The first guide part is connected to multiple tooth receiving cavities across the anterior tooth area, and the support part is formed by the gingiva of the tooth receiving cavity in the posterior tooth area. The end extends to the palatal side, and these components are used to guide the forward movement of the mandible, reducing the negative impact on the maxillary anterior teeth, and solving the problem of deep overbite through the cooperation of the second guide part.
It improves the correction effect, reduces the undesired lingual inclination of the maxillary anterior teeth, enhances the comfort of the correction process, avoids the problem of posterior teeth opening, and achieves effective correction of protruding malocclusion.
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Abstract
Description
Shell-shaped dental instrument and tooth correction system
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application is based on the Chinese patent application with application number "202210576041.X" and application date of May 24, 2022, and the Chinese patent application "202221363764.3" and application date of May 24, 2022, and claims the priority of the above-mentioned Chinese patent applications. The entire contents of the above-mentioned Chinese patent applications are hereby incorporated into this application by introduction. Technical Field
[0003] The embodiments of the present application relate to the technical field of dental correction, and in particular to a shell-shaped dental instrument and a dental correction system. Background Art
[0004] Protrusive malocclusion is a common dentofacial problem in the Oriental population. A large part of protrusive malocclusion is manifested as mandibular recession, especially mandibular recession caused by mouth breathing problems in children. For cases of mandibular recession, the mandibular position needs to be adjusted to guide the sagittal adjustment of the mandible forward. Currently commonly used orthodontic devices include maxillary bevel guides, Twin-Block (TB for short) appliances, etc. For TB appliances, the blocks need to be placed in the first molar area of the maxillary premolars and the mandibular premolar area on both sides. For adolescent patients in the dentition replacement period, when their lateral teeth are being replaced or are about to fall off, the use of TB cannot overcome the retention problems caused by frequent tooth replacement during the dentition replacement period and improve good retention.
[0005] In the existing technology, maxillary bevel guides are also used as removable appliances to correct mandibular retraction, a common symptom in adolescents. Removable appliances typically consist of a base, clasps, and other components. They are bulky, have a strong sense of foreign matter in the patient's mouth, are aesthetically pleasing, and offer poor comfort.
[0006] To this end, this application provides a solution to the above problems.
[0007] Summary of the Invention
[0008] The technical problem solved by the present application is to overcome the defects of the existing technology and provide a shell-shaped dental instrument and a tooth correction system.
[0009] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:
[0010] A shell-shaped dental instrument, worn on the maxillary dentition, comprises a shell-shaped body, the shell-shaped body is provided with a plurality of tooth receiving cavities, the shell-shaped body is provided with an adjustment portion in the palate area for adjusting the relative position relationship between the upper and lower jaws, the adjustment portion comprises a first guide portion and a support portion for supporting the first guide portion, the first guide portion spans the upper palate corresponding to the anterior teeth area and is connected to the lingual free ends of at least two of the tooth receiving cavities in the anterior teeth area, the first guide portion is inclined to the mandibular plane so that the front teeth of the mandibular part slide along the first guide portion and drive the mandibular forward to the target correction position; the support portion is connected to the first guide portion, and the support portion is formed by extending the gingival ends of the plurality of tooth receiving cavities in the posterior teeth area toward the palate side. When worn, the support portion is partially supported on the upper palate.
[0011] A dental orthodontic system comprises a plurality of shell-shaped dental appliances, at least one of the plurality of shell-shaped dental appliances being a shell-shaped dental appliance as described above, and the plurality of shell-shaped dental appliances having a geometric shape for adjusting a mandible from a first position to a second position while gradually repositioning teeth from an initial position to a target position.
[0012] The present application provides a shell-shaped dental instrument, in which a first guide portion for adjusting the movement of the mandible in the sagittal direction is provided in the palate region, and a support portion connected to the first guide portion is provided in the palate region. After wearing the shell-shaped dental instrument, during the patient's occlusion, the first guide portion can guide the mandible to move forward, and the reaction force generated when the mandible is moved is applied to the patient's palate by the first guide portion and the support portion provided in the palate region, thereby reducing the negative impact on the maxillary anterior teeth during the correction of the mandible and improving the correction effect. In addition, the second guide portion provided between the tooth receiving cavity and the first guide portion cooperates with the first guide portion, and in addition to being able to solve the problem of mandibular retraction, it can also further open the bite to solve the problems of deep overbite and deep overjet, thereby achieving the correction of protrusive malocclusion during adolescence.
[0013] Furthermore, the present application also provides a dental correction system having multiple shell-shaped dental instruments, wherein at least two continuously used shell-shaped dental instruments in the above correction system have a first guide portion and a second guide portion. Through the multiple shell-shaped dental instruments, multiple target positions can be set between the initial correction position and the final correction position, thereby improving the comfort of the correction process and avoiding the problem of open bite of the posterior teeth when opening the bite. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG1 is a schematic structural diagram of a shell-shaped dental instrument provided in one embodiment of the present application;
[0015] FIG2 is a schematic structural diagram of a front view of the shell-shaped dental apparatus in FIG1 ;
[0016] FIG3 is a cross-sectional view taken along the line 2A-A′ of FIG2;
[0017] FIG4 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0018] FIG5 is a BB' cross-sectional view of FIG4;
[0019] FIG6 is another cross-sectional view taken along line BB' of FIG4;
[0020] FIG7 is another cross-sectional view taken along line BB' of FIG4;
[0021] FIG8 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0022] FIG9 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0023] FIG10 is another cross-sectional view taken along the line PP' of FIG9;
[0024] FIG11 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0025] FIG12 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0026] FIG13 is a schematic structural diagram of a shell-shaped dental apparatus provided in another embodiment of the present application;
[0027] FIG. 14 is a cross-sectional view of two shell-shaped dental appliances used consecutively in the dental orthodontic system of the present application. DETAILED DESCRIPTION
[0028] The technical problem solved by the present application is to overcome the defects of the existing technology and provide a new shell-shaped dental appliance and dental orthodontic system for correcting mandibular retrusion, deep overbite and deep overjet problems in adolescents. In the existing technology, for cases of mandibular retrusion, a device that can guide the mandible forward is usually provided on the lingual side of the maxillary dentition. However, when guiding the mandible forward, the maxillary anterior teeth will usually be pulled backward by the mandible, resulting in undesirable lingual inclination of the maxillary anterior teeth. The present application designs the device for guiding the mandible forward and opening the bite in the palate, so that the undesirable force generated when guiding the mandible forward is applied to the palate and the palate area adjustment part, thereby reducing the possibility of lingual inclination of the maxillary anterior teeth.
[0029] The “posterior tooth area” mentioned in each embodiment of the present application is defined according to the classification of teeth in the second edition of “Introduction to Stomatology” published by Peking University Medical Press, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 by the FDI notation method, and the teeth in the anterior tooth area are displayed as teeth 1-3 by the FDI notation method. The teeth in the anterior tooth area include central incisors, lateral incisors and canines. In addition, for the teeth in the deciduous tooth stage, the “posterior tooth area” is defined according to the classification of deciduous teeth in the second edition of “Introduction to Stomatology” published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines and deciduous molars, among which deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars. The shell-shaped dental appliance in the present application is mainly worn on the maxillary dentition of deciduous teeth or the maxillary dentition of the replacement dentition period.
[0030] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:
[0031] A shell-shaped dental device is made of a polymer material and is used to be worn on the maxillary dentition. It includes a shell-shaped body 1, which is provided with a plurality of tooth-receiving cavities 11. The shell-shaped body 1 is provided with an adjustment portion 2 in the palate region for adjusting the relative position relationship between the upper and lower jaws. In some embodiments, as shown in FIG1 , the adjustment portion 2 includes a first guide portion 21 and a support portion 22 for supporting the first guide portion 21. The first guide portion 21 spans the upper palate corresponding to the anterior teeth region and is connected to the lingual free ends of at least two tooth-receiving cavities 11 in the anterior teeth region. In some embodiments, as shown in FIG1 , the first guide portion 21 connects the lingual free ends of all the tooth-receiving cavities 11 in the anterior teeth region, and the first guide portion 21 is formed by the lingual free ends of at least two tooth-receiving cavities 11 in the anterior teeth region extending toward the opposite jaw and away from the anterior teeth. The lingual free end here specifically refers to the end of the lingual side of the tooth-receiving cavity 11 adjacent to the gingival side. Therefore, the lingual side of the tooth-receiving cavity 11 in the anterior teeth region connected to the first guide portion 21 does not cover the entire lingual side of the corresponding tooth. Referring to Figures 2 and 3, the first guide portion 21 is arranged at an angle to the mandibular plane, which enables the front teeth of the mandibular part to slide along the first guide portion 21 and drive the mandibular to move forward to the target correction position. The mandibular plane refers to the plane formed by the mesial adjacent point of the mandibular central incisor and the distal buccal cusp of the last molar on both sides of the mandible. After the patient wears the shell-shaped dental appliance in the present application on the upper jaw, during the occlusion process, the incisor tips of the mandibular anterior teeth slide forward along the first guide surface 211 of the first guide portion 21 to the target correction position. The first guide surface 211 is a curved surface consistent with the shape of the dental arch, and the angle between the tangent plane passing through any point on the first guide surface 211 and the mandibular plane is greater than 0° and less than or equal to 45° so that the incisor tips of the mandibular anterior teeth can contact the first guide and slide along the first guide surface 211.
[0032] In some embodiments, the first guide portion 21 is provided with a first guide surface 211 , which is a curved surface, and the angle between a tangent plane passing through any point on the first guide surface 211 and the mandibular plane is greater than 0° and less than or equal to 45°.
[0033] In some embodiments, the surface of the support portion 22 that contacts the upper palate matches the surface of the palatal fold at the corresponding position.
[0034] Referring to Figures 1 and 2 , the support portion 22 is formed by the lingual gingival ends of the multiple tooth-receiving cavities 11 in the posterior region extending toward the palate, or by the lingual gingival ends of the multiple tooth-receiving cavities 11 in the posterior region and a portion of the multiple tooth-receiving cavities 11 in the anterior region extending toward the palate, with the portion adjacent to the anterior region extending to connect with the first guide portion 21. When the shell-shaped dental appliance is worn, the support portion 22 is partially supported on the palate. In some embodiments, as shown in Figure 2 , the support portion 22 fits against the palate adjacent to the teeth in the posterior region and spans the palate corresponding to teeth 3-4. The surface of the support portion 22 that fits against the palate matches the surface of the palatal fold at the corresponding location, i.e., the surface of the support portion 22 that fits against the palate is structurally consistent with the surface of the palatal fold at the corresponding location. The support portion 22 primarily serves to enhance the integrity of the adjustment portion 2 when the first guide portion 21 guides the mandible forward, thereby increasing its strength and making it less susceptible to deformation when the first guide portion 21 guides the mandible forward. At the same time, through the connection between the support part 22 and the first guide part 21, part of the unwanted force generated when guiding the mandible forward is adjusted to the support part 22 and the upper palate area to which the support part 22 is attached, thereby reducing the unwanted tongue inclination of the maxillary anterior teeth.
[0035] In some embodiments, referring to Figures 3 and 4, the adjustment portion 2 further includes a second guide portion 23, the proximal end of the second guide portion 23 being connected to the lingual free ends of at least two tooth receiving cavities 11 in the anterior tooth region, and the distal end of the second guide portion 23 being connected to the proximal end of the first guide portion 21. In some embodiments, the second guide portion 23 is connected to the lingual free ends of all tooth receiving cavities 11 in the anterior tooth region, and the tooth receiving cavities 11 connected to the second guide portion 23 only cover the labial side and incisal portion of the corresponding teeth. The second guide portion 23 is provided with a second guide surface 231 for depressing the mandibular anterior teeth, and the portion of the second guide surface 231 in contact with the incisal end of the mandibular anterior teeth is a plane perpendicular to the long axis of the mandibular anterior teeth. Preferably, as shown in reference Figure 5, the cross-sectional shape of the second guide portion 23 and the first guide portion 21 in the sagittal plane is an inverted "V" shape, that is, the cross-sectional shape of the first guide surface 211 and the second guide surface 231 and the sagittal plane is an inverted "V" shape, and the angle α of the inverted "V" shape is greater than 45° and less than or equal to 150°. When worn, the incisal end of the anterior teeth of the mandibular part is located at the connection between the second guide portion 23 and the first guide portion 21.
[0036] In some embodiments, the second guide portion 23 is provided with a second guide surface 231 for depressing the mandibular anterior teeth, and the portion of the second guide surface 231 in contact with the incisal end of the mandibular anterior teeth is a plane perpendicular to the long axis of the mandibular anterior teeth.
[0037] Continuing with FIG4 , in some embodiments, the first guide portion 21 and / or the second guide portion 23 are symmetrically arranged about the tooth midline. The symmetrical arrangement about the tooth midline can ensure that the force borne by the adjustment portion 2 is also symmetrical about the tooth midline, thereby achieving force balance.
[0038] In some embodiments, the minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane is the distance that the mandible needs to move in the sagittal direction according to the correction plan.
[0039] In some embodiments, the distance between the junction and the palatal fold is 0-2 mm.
[0040] Referring to Figures 5 and 6, the minimum sagittal length x of the projection of the first guide portion 21 on the horizontal plane is the distance that the mandible needs to move in the sagittal direction according to the correction plan. After the patient wears the shell-shaped dental appliance, during the occlusion process, the incisor tip of the mandibular anterior teeth slides along the first guide portion 21 to the connection between the first guide portion 21 and the second guide portion 23, and finally remains stably at the connection. The distance H1 between the connection and the palatal fold is 0-2mm, which is used to adjust the vertical position relationship between the upper and lower jaws, and can play a role in opening the bite for cases with deep overbite and deep overjet. Shell-shaped dental appliances generally need to be worn for 7-14 days. During the wearing period, they can stimulate the growth and development of the mandible for a long time and continuously, so that the muscles of the mandible form a new biomechanical balance in the new position, so that the mandible can continue to maintain the target position after being removed from the wearing.
[0041] In some embodiments, with continued reference to FIG6 , the first guide portion 21 has a first palatal side surface, which is the surface of the first guide portion 21 close to the palate, and the distance H2 between the first palatal side surface and the palatal fold in the vertical direction is 0-2 mm. When the distance between the first palatal side surface and the palatal fold is 0 mm, the first palatal side surface is in close contact with the palatal fold. In some embodiments, the surface structure of the first palatal side surface matches the surface structure of the palatal fold at the corresponding position, and the surface structure of the first palatal side surface is completely in close contact with the palatal fold, thereby enhancing the comfort when wearing and also enhancing the strength of the adjustment portion 2.
[0042] In some embodiments, as shown in Figure 7 , the second guide portion 23 at least partially avoids contact with the lingual surface of the anterior tooth 3. In some embodiments, during wear, a gap is maintained between the second guide portion 23 and the lingual surface of the corresponding tooth 3, effectively reducing any undesirable forces exerted by the second guide portion 23 on the corresponding tooth 3 during use. In some cases, the deformation resistance of the second guide portion 23 can be improved by changing the material of the second guide portion 23 to a material with greater rigidity than that of the tooth-receiving cavity 11.
[0043] In some embodiments, the tooth-receiving cavity 11 in the anterior region does not contact the labial side of the corresponding anterior teeth. For example, a gap is provided between the inner surface of the labial side of the anterior region tooth-receiving cavity 11 and the outer surface of the corresponding anterior teeth, or the labial side of the anterior region tooth-receiving cavity 11 is hollowed out. For example, as shown in FIG8 , the labial side of the anterior region tooth-receiving cavity 11 is hollowed out. This ensures that when the shell-shaped dental appliance is worn, the tooth-receiving cavity 11 in the anterior region does not exert any corrective or other forces on the anterior teeth.
[0044] In some embodiments, referring to Figures 9, 10 and 11, the support portion 22 is connected to the first guide portion 21 by a connecting portion 221, and a tongue guide portion 211a is provided on the connecting portion 221. The tongue guide portion 211a is used to induce the tip of the tongue to adjust to the target correction position. Specifically, by licking the tongue guide portion 211a for a long time, the patient can eliminate the changes in the dental arch and alveolar bone morphology caused by bad tongue habits. Most children's malocclusion is caused by bad oral habits. The shell-shaped dental instrument in this application is designed with a tongue guide portion 211a to perform synchronous correction on the tongue while adjusting the malocclusion, thereby eliminating secondary malocclusion caused by bad tongue habits after the subsequent correction is completed. In some embodiments, the tongue guide portion 211a is a geometric structure that is convex or concave toward the tongue. As shown in FIG10 , when the tongue guide portion 211a is a geometric structure that convexly projects toward the tongue body, the tongue guide portion 211a is a solid structure, or the tongue guide portion 211a is a closed hollow structure. When the tongue guide portion 211a is a geometric structure that is concave toward the tongue body, as shown in FIG11 , the tongue guide portion 211a can be formed directly by concavely concavely the surface of the connecting portion 221 toward the anterior tooth area. The tongue guide portion 211a can be designed in a semicircular, triangular, or other polygonal configuration.
[0045] In some embodiments, the elastic modulus of the first guide portion 21 is greater than that of the shell body 1, ensuring that the first guide portion 21 does not deform during use, thereby improving correction accuracy. For example, the shell body 1 can be made of a material with an elastic modulus within the range of 0.2 MPa to 500 MPa, and the first guide portion 21 can be made of a material with an elastic modulus within the range of 0.5 MPa to 600 MPa. Alternatively, the first guide portion 21 can be designed to have a stiffness greater than that of the shell body 1. For example, the first guide portion 21 can be a solid structure or a multi-layer structure. When such a structure is adopted, the shell-shaped dental device can be produced using additive manufacturing methods.
[0046] In some embodiments, the first guide portion 21 has a reinforcing portion 4 arranged along the sagittal direction.
[0047] In some embodiments, a reinforcing ridge can be designed on the adjustment portion 2 to improve the deformation resistance of the adjustment portion 2 and improve the correction accuracy. Referring to Figure 12, the reinforcing portion 4 can be provided on the surface of the connecting portion 221, and the reinforcing portion 4 forms a plurality of protruding or concave structures on the surface of the connecting portion 221. Or as shown in Figure 13, the reinforcing portion 4 is provided on the first guide surface 211 of the first guide portion 21. In some embodiments, the reinforcing portion 4 is a reinforcing ridge that is protruding or concave in the direction of the tongue of a portion of the first guide portion 21, and the reinforcing portion 4 needs to be provided along the sagittal direction to avoid obstruction of the mandibular anterior teeth when sliding on the first guide portion 21.
[0048] The present application also includes a dental orthodontic system comprising a plurality of shell-shaped dental appliances, at least one of which is a shell-shaped dental appliance as described in any of the aforementioned embodiments, and the plurality of shell-shaped dental appliances having a geometry for adjusting the mandible from a first position to a second position while gradually repositioning the teeth from an initial position to a target position. The final target position at the end of treatment is typically a mandibular incisor at a normal labial angle and below the lingual protuberance of the upper incisor.
[0049] In some embodiments, as shown in FIG14 , the adjustment portion 2 of the orthodontic system, which includes at least two consecutively used shell-shaped dental appliances, includes a second guide portion 23. The proximal end of the second guide portion 23 is connected to the lingual free ends of at least two tooth-receiving cavities 11 in the anterior tooth region, and the distal end of the second guide portion 23 is connected to the proximal end of the first guide portion 21. The sagittal cross-section of the second guide portion 23 and the first guide portion 21 forms an inverted "V" shape. When worn, the incisal ends of the mandibular anterior teeth are located at the junction of the second guide portion 23 and the first guide portion 21. The angle α formed by the first guide surface 211 and the second guide surface 231 gradually increases with the progress of the orthodontic treatment in different shell-shaped dental appliances. Furthermore, in some embodiments, the vertical distance H1 between the connection point of the subsequent shell-shaped dental appliance and the palatal fold is greater than the vertical distance H1 between the connection point of the previous shell-shaped dental appliance and the palatal fold. As the treatment progresses, the vertical distance H1 between the connection point of the shell-shaped dental appliance and the palatal fold in the next step increases by 0.1 mm compared to the vertical distance H1 between the connection point of the shell-shaped dental appliance and the palatal fold in the previous step. The shell-shaped dental appliance with the second guide portion 23 in the dental orthodontic system can be designed to gradually lower the mandibular anterior teeth to open the bite and address deep overbite and deep overjet. The advantage of designing the pressure in stages is that it avoids the problem of open bite caused by lowering the mandibular anterior teeth in one step.
[0050] It should be noted that the terms "previous step" and "next step" specifically refer to the process of orthodontic treatment, where a shell-shaped dental appliance is worn during each step. Therefore, the terms "previous step" and "next step" here refer to the shell-shaped dental appliance used in a step and the shell-shaped dental appliance used in the subsequent step of two consecutive steps. Typically, the shell-shaped dental appliance in this application is worn for 7-14 days.
[0051] In some embodiments, the minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane of at least two consecutively used shell-shaped dental instruments in the orthodontic system is the same. Alternatively, referring to FIG14 , the minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane of the shell-shaped dental instrument in the next step of at least two consecutively used shell-shaped dental instruments in the x-direction is greater than the minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane of the shell-shaped dental instrument in the previous step. In FIG14 , L is the difference in the minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane in the two consecutive steps, and the value of L is between 0.1 mm and 0.2 mm. The minimum sagittal length of the projection of the first guide portion 21 on the horizontal plane is the distance that the first guide portion 21 guides the mandible to slide forward in the sagittal direction.
[0052] It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed by such combination are all within the scope of protection of this application. In order to save the length of the application text, they will not be repeated here.
[0053] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
[0054] Similarly, the above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. A shell-shaped dental instrument, worn on the maxillary dentition, comprising a shell-shaped body, the shell-shaped body being provided with a plurality of tooth receiving cavities, the shell-shaped body being provided with an adjustment portion in the palate region for adjusting the relative position relationship between the upper and lower jaws, the adjustment portion comprising a first guide portion and a support portion for supporting the first guide portion, the first guide portion spanning the upper palate corresponding to the anterior teeth area and being connected to the lingual free ends of at least two of the plurality of tooth receiving cavities in the anterior teeth area, the first guide portion being inclined relative to the mandibular plane so that the front teeth of the mandibular part slide along the first guide portion and drive the mandibular part to move forward to the target correction position; the support portion being connected to the first guide portion, the support portion being formed by extending from the gingival end of the plurality of tooth receiving cavities in the posterior teeth area toward the palate side, and when worn, the support portion is partially supported on the upper palate.
2. The shell-shaped dental appliance according to claim 1, wherein The first guide portion is formed by the lingual free ends of the at least two tooth receiving cavities in the front teeth area extending toward the opposite jaw and away from the front teeth.
3. The shell-shaped dental appliance according to claim 2, wherein The first guide portion is provided with a first guide surface, which is a curved surface. The angle between a tangent plane passing through any point on the first guide surface and the mandibular plane is greater than 0° and less than or equal to 45°.
4. The shell-shaped dental device according to claim 2 or 3, wherein: The adjustment portion also includes a second guide portion, the proximal end of the second guide portion is connected to the lingual free ends of the at least two tooth receiving cavities in the anterior tooth area, and the distal end of the second guide portion is connected to the proximal end of the first guide portion.
5. The shell-shaped dental appliance according to claim 4, wherein The second guide portion is provided with a second guide surface for depressing the mandibular front teeth, and the portion of the second guide surface that contacts the incisal end of the mandibular front teeth is a plane perpendicular to the long axis of the mandibular front teeth.
6. The shell-shaped dental appliance according to claim 4 or 5, wherein: The cross-sectional shape of the second guide portion and the first guide portion in the sagittal plane is an inverted "V" shape, and the angle of the inverted "V" shape is greater than 45° and less than or equal to 150°. When worn, the cutting end of the anterior teeth of the mandibular part is located at the connection between the second guide portion and the first guide portion.
7. The shell-shaped dental device according to any one of claims 1 to 6, wherein: The minimum sagittal length of the projection of the first guide portion on the horizontal plane is the distance that the mandible needs to move in the sagittal direction according to the correction plan.
8. The shell-shaped dental appliance according to claim 6, wherein The distance between the connection and the palatal fold is 0-2 mm.
9. The shell-shaped dental device according to any one of claims 1 to 8, wherein: The first guide portion has a first palatal side surface, and a distance between the first palatal side surface and the palatal fold in a vertical direction is 0-2 mm.
10. The shell-shaped dental appliance according to claim 9, wherein The surface structure of the first palatal side surface matches the surface structure of the palatal fold at the corresponding position.
11. The shell-shaped dental appliance according to any one of claims 4 to 10, wherein: The second guide portion is at least partially out of contact with the lingual side surface of the teeth in the anterior region.
12. The shell-shaped dental appliance according to any one of claims 1 to 11, wherein: The first guide portion is symmetrically arranged about the tooth midline.
13. The shell-shaped dental appliance according to any one of claims 4 to 12, wherein: The second guide portion is symmetrically arranged about the tooth center line.
14. The shell-shaped dental appliance according to any one of claims 1 to 13, wherein: The at least two tooth receiving cavities in the front tooth area do not contact the labial side surfaces of the corresponding front teeth.
15. The shell-shaped dental appliance according to claim 14, wherein There is a gap between the inner surface of the labial side of the at least two tooth receiving cavities in the front teeth area and the outer surface of the corresponding front teeth, or the labial side surfaces of the at least two tooth receiving cavities in the front teeth area are hollowed out.
16. The shell-shaped dental appliance according to any one of claims 1 to 15, wherein The support portion and the first guide portion are connected via a connecting portion, and a tongue guide portion is provided on the connecting portion. The tongue guide portion is a geometric structure that is convex or concave toward the tongue body.
17. The shell-shaped dental appliance according to claim 16, wherein When the tongue guiding portion is a geometric structure protruding toward the tongue body, the tongue guiding portion is a solid structure.
18. The shell-shaped dental appliance according to claim 16, wherein When the tongue guiding portion is a geometric structure protruding toward the tongue body, the tongue guiding portion is a closed hollow structure.
19. The shell-shaped dental appliance according to any one of claims 1 to 18, wherein The surface of the supporting portion that is in contact with the upper palate matches the surface of the palatal fold at the corresponding position.
20. The shell-shaped dental appliance according to any one of claims 1 to 19, wherein The elastic modulus of the first guide portion is greater than the elastic modulus of the shell-shaped body.
21. The shell-shaped dental appliance according to any one of claims 1 to 20, wherein The first guide portion has a stiffness greater than that of the shell-shaped body.
22. The shell-shaped dental appliance according to claim 21, wherein The first guide portion has a reinforcement portion arranged along the sagittal direction.
23. The shell-shaped dental appliance according to claim 22, wherein The reinforcement portion is a reinforcement ridge that is part of the first guide portion and is convex or concave toward the tongue body.
24. A dental orthodontic system comprising a plurality of shell-shaped dental appliances, wherein at least one of the plurality of shell-shaped dental appliances is a shell-shaped dental appliance according to any one of claims 1 to 23, and wherein the plurality of shell-shaped dental appliances have a geometric shape for adjusting a mandible from a first position to a second position while gradually repositioning teeth from an initial position to a target position.
25. The dental orthodontic system of claim 24, wherein: The adjustment portion of at least two continuously used shell-shaped dental instruments among the multiple shell-shaped dental instruments also includes a second guide portion, the proximal end of the second guide portion is connected to the lingual free ends of at least two tooth receiving cavities in the anterior tooth area, the distal end of the second guide portion is connected to the proximal end of the first guide portion, the cross-sectional shape of the second guide portion and the first guide portion in the sagittal plane is an inverted "V" shape, and when worn, the incisal end of the anterior teeth of the mandibular part is located at the connection between the second guide portion and the first guide portion.
26. The dental orthodontic system according to claim 25, wherein: The vertical distance between the connection point and the palatal fold in the next shell-shaped dental appliance of the at least two continuously used shell-shaped dental appliances is greater than the vertical distance between the connection point and the palatal fold in the previous shell-shaped dental appliance.
27. The dental orthodontic system according to claim 24, wherein: The minimum lengths of the projections of the first guide portions on the at least two shell-shaped dental instruments used continuously on the horizontal plane in the sagittal direction are the same.
28. The dental orthodontic system according to claim 24, wherein: The minimum sagittal length of the projection of the first guide portion of the next shell-shaped dental instrument in the at least two continuously used shell-shaped dental instruments on the horizontal plane is greater than the minimum sagittal length of the projection of the first guide portion of the previous shell-shaped dental instrument on the horizontal plane.