Dental instrument and dental system
By designing the tongue support part in the dental instrument and using the force of the tongue muscle to exert a horizontal arch expansion force, the problem of the inability of silicone appliances to effectively expand the arch in the existing technology is solved, and the correction cycle is shortened, the comfort is improved, and the teeth are Promotion of growth and development.
Patent Information
- Application Number
- CN202420945123.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the prior art, the use of silicone orthopedic devices cannot achieve good dental arch expansion effect, resulting in long orthopedic cycles, high costs, frequent follow-up visits and uncomfortable wearing.
A dental instrument is designed, which includes a bearing part and a tongue supporting part. The bearing part is in contact with part of the teeth, and the tongue bearing part is inclined relative to the sagittal plane as a whole. When worn, it is used to bear the tongue body and exert a horizontal arch expansion force through the tongue body.
Through the power of tongue muscles, the dental arch can be effectively expanded, shortening the correction cycle, improving the comfort of correction, and promoting the growth and development of teeth in the correct dental arch.
Smart Images
Figure CN222341323U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of oral orthodontics, and in particular to a dental instrument and a dental system. Background Art
[0002] Regarding early malocclusion in children's growth and development stage, studies have shown that muscles have a key impact on the stability of oral orthodontic treatment during the development stage, and in some cases muscle problems are the cause of oral problems. Ignoring muscle problems may make corrections difficult or relapse after treatment.
[0003] Orofacial myofunctional therapy (OMT) is a multidisciplinary comprehensive treatment method for evaluating, diagnosing, preventing and treating patients in the growth and development stage with abnormalities in the oral and maxillofacial muscles and their functions. Its mechanism is to promote the normal development of the craniofacial structure and the coordinated stability of the oral and maxillofacial system functions by re-education of the nerves and muscles of the oral and maxillofacial region. It is a treatment method that focuses on the cause of the disease. Silicone braces are usually used in the existing technology. This type of braces can break muscle dysfunction and use growth and development to correct malocclusion.
[0004] At present, orthodontists and pediatric dentists generally use silicone braces to treat oral and facial muscle dysfunction and align teeth simultaneously during the period of tooth replacement, but most cases will have narrow dental arches due to muscle function problems. Therefore, doctors will also use slow arch expansion devices to expand the arches and align crowded teeth. Although this device has good results, it has the disadvantages of long treatment time, high cost, frequent follow-up visits, and discomfort when worn. The aforementioned soft silicone braces are favored by children and parents because of their safety and comfort. Although they themselves also have the function of partially adjusting the dental arch, the force for adjusting the dental arch is small and the effect of adjustment is minimal. Therefore, how to improve the arch expansion ability of current soft silicone braces, so as to help induce children's teeth to grow and develop in the correct dental arch, is a problem that needs to be solved urgently. Utility Model Content
[0005] The purpose of the embodiments of the present application is to provide a dental instrument and a dental system that assists in applying horizontal arch expansion force on the basis of breaking down muscle dysfunction, which can solve the problems in the prior art that silicone braces cannot achieve good arch expansion effects and need to use other devices for auxiliary treatment, so as to shorten the correction period and improve the correction comfort.
[0006] To achieve the above-mentioned purpose, an embodiment of the present application provides a dental device, which includes a bearing portion that contacts at least part of the teeth, the lingual edge of the bearing portion extends toward the gum to form an inner wall located on the lingual side of the dental arch, and the labial and buccal edges of the bearing portion extend toward the gum to form an outer wall, and when worn, the outer wall contacts the labiocheir muscles; the outer wall, the bearing portion, and the inner wall form an upper groove that defines the upper dental arch and a lower groove that defines the lower dental arch; at least part of the inner wall extends toward the lingual side from a position adjacent to the lower groove to the terminal lower edge to form a tongue supporting portion, and the tongue supporting portion is inclined relative to the sagittal plane as a whole, and when worn, the tongue supporting portion is used to carry the tongue to the corresponding position of the lower dentition and apply a horizontal expansion force to the lower dentition through the tongue.
[0007] Preferably, the tongue supporting portion is arranged at least corresponding to the position of the teeth in the posterior area of the mandible.
[0008] Preferably, the tangent line at the highest point of the tongue supporting portion in the posterior teeth area is arranged at a preset angle with the sagittal plane, and the preset angle is greater than 0° and less than or equal to 45°.
[0009] Preferably, the thickness of the tongue supporting portion in the buccal-lingual direction is greater than the thickness of the inner wall of the remaining portion.
[0010] Preferably, the thickness of the tongue supporting portion in the buccal-lingual direction ranges from 3 mm to 5 mm.
[0011] Preferably, the horizontal width of the lower groove in the posterior tooth area is greater than the width of the patient's dentition at the position corresponding to the posterior tooth area so that the patient's lower dental arch is subjected to a horizontal expansion force when wearing the device.
[0012] Preferably, the horizontal width of the upper groove or the lower groove in the posterior tooth area is 1.05 times to 1.2 times the width of the patient's dentition at the position corresponding to the posterior tooth area.
[0013] Preferably, the inner side surface of the tongue supporting portion is provided with a ridge structure for guiding the tongue to lick.
[0014] Preferably, the protrusion height of the ridge structure toward the tongue side is between 3mm and 6mm.
[0015] Preferably, the ridge structure is arranged close to the gingival margin corresponding to the tooth crown.
[0016] Preferably, the ridge structure and the tongue supporting portion are connected separately.
[0017] Preferably, the ridge structure is fixed to the surface of the tongue supporting portion by bonding.
[0018] Another embodiment of the present application also provides a dental system, comprising at least a first dental instrument and a second dental instrument, wherein the first dental instrument and the second dental instrument are respectively the dental instruments described in any one of the above, wherein a tangent line of a first tongue supporting portion of the first dental instrument at the highest point in the posterior tooth area has a first angle with a sagittal plane, and a tangent line of a second tongue supporting portion of the second dental instrument at the highest point in the posterior tooth area has a second angle with the sagittal plane, and the first angle is different from the second angle.
[0019] Preferably, the correction stage corresponding to the second dental appliance is a subsequent stage of the correction stage corresponding to the first dental appliance, and the second angle is greater than the first angle.
[0020] Compared with the prior art, the dental instrument and dental system provided by the utility model have the following advantages:
[0021] The dental device in each embodiment of the present application has a tongue support portion extending from the position adjacent to the lower groove to the lower edge of the end toward the tongue side on the inner side wall, and the tongue support portion is inclined relative to the sagittal plane as a whole. When worn, the tongue support portion is used to carry the tongue to the corresponding position of the lower dentition, and exert a horizontal expansion force on the lower dentition through the tongue. The dental device in the present application can not only use the power of the tongue muscles to achieve the effect of expansion, but also guide the tongue to complete the training in this process, fully mobilize the strength of the oral muscles, and thus achieve a better correction effect.
[0022] In addition, the upper groove and the lower groove of the dental device in the present application will also exert a horizontal expansion force on the narrow dentition during the wearing process. However, due to the squeezing effect of the cheek muscles during the wearing process, the upper groove and the lower groove cannot fully contact the dentition and then exert force on the narrow dentition. By designing a structure such as the tongue support part, the squeezing of the cheek muscles can be effectively resisted, thereby increasing the contact area between the upper groove and the lower groove and the dentition and improving the force applied to the dentition. Therefore, the dental device in the present application can adjust the dental arch to a normal arch width while inducing the normal growth of children's teeth, which is beneficial to reserve sufficient space for the growth of teeth in the replacement period and can better induce the growth and development of teeth.
[0023] The present application also includes a dental system, which is provided with a tongue supporting part with different inclination angles corresponding to different correction stages. The dental system in the present application can meet the different requirements for the expansion force at different correction stages, thereby improving the correction effect and shortening the correction cycle. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0025] Figure 1 is a schematic diagram of the structure of dental instruments in some embodiments of the present application;
[0026] Figure 2 is a schematic structural diagram of a dental apparatus in some embodiments of the present application at another viewing angle;
[0027] Figure 3 Schematic diagrams of various anatomical planes in some embodiments of the present application;
[0028] Figure 4 is a schematic structural diagram of a dental apparatus in some embodiments of the present application at another viewing angle;
[0029] Figure 5 yes Figure 4 A cross-sectional schematic diagram of the embodiment along CC in the wearing state;
[0030] Figure 6 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0031] Figure 7 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0032] Figure 8 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0033] Fig. 9 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0034] Fig.10 is a schematic diagram of the structure of the dental apparatus in a worn state in some embodiments of the present application;
[0035] Fig.11 is a schematic diagram of the structure of dental instruments in some embodiments of the present application;
[0036] Fig.12 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0037] Fig.13 is a schematic diagram of the structure of the tongue supporting portion in some embodiments of the present application;
[0038] Fig.14 is a schematic diagram of the structure of a dental system in some embodiments of the present application;
[0039] Fig.15 is a schematic diagram of the structure of a dental system in some embodiments of the present application;
[0040] Fig.16 It is a schematic diagram of the structure of the dental system in other embodiments of the present application. DETAILED DESCRIPTION
[0041] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.
[0042] 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 marking method, and the teeth 1-3 in the anterior tooth area by the FDI marking 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.
[0043] The shell-like body is provided with a number of cavities for accommodating multiple teeth, and is divided into lingual surface, labial surface, mesial surface and distal surface. Among them, "lingual surface" is named according to the names of various surfaces of the crown in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36, where the labial surface and buccal surface are the sides of the crown of the front teeth close to the lips, and the sides of the crown of the back teeth close to the cheek are called buccal surfaces. The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively referred to as the lingual surface. The mesial surface and the distal surface are the two surfaces adjacent to the crown of the adjacent teeth, collectively referred to as the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.
[0044] The various implementations of the present application are described below in conjunction with the accompanying drawings.
[0045] refer to Figures 1 to 5As shown, an embodiment of the present application provides a dental device 1, which includes a bearing portion 11 that contacts at least part of the teeth, and the bearing portion 11 is arranged parallel to the occlusal surface or the horizontal plane and contacts the jaw surface of part of the teeth. The lingual edge of the bearing portion 11 extends toward the gums to form an inner wall 12 located on the lingual side of the dental arch, and specifically, it can extend 1mm-3mm toward the maxillary and mandibular directions respectively to cover the lingual side of the maxillary and mandibular teeth and part of the gum area. The labial and buccal edges of the bearing portion 11 extend toward the gums to form an outer wall 13, and similarly, the outer wall 13 can extend 1mm-9mm toward the maxillary and mandibular directions respectively to cover the labial side of the maxillary and mandibular teeth and part of the gum area, and the outer wall 13 can block the contact between the labial and buccal muscles and the dentition, thereby eliminating the influence of muscles on tooth correction during the correction process. The outer wall 13, the bearing part 11 and the inner wall 12 enclose an upper groove 14 defining the upper dental arch and a lower groove 15 defining the lower dental arch; the relative position relationship between the upper groove 14 and the lower groove 15 is the relationship between the upper and lower jaws of the final correction target, and the sagittal upward distance between the positions corresponding to the anterior teeth of the upper groove 14 and the lower groove 15 corresponds to the covering relationship of the teeth in the anterior teeth at the correction target position. At least part of the inner wall 12 extends from the position adjacent to the lower groove 15 to the lower edge of the end to the lingual side to form a tongue supporting part 121, which is inclined relative to the sagittal plane as a whole. When worn, the tongue supporting part 121 is used to carry the tongue to the corresponding position of the lower dentition and apply a horizontal expansion force to the lower dentition through the tongue.
[0046] The anatomical surface references in each embodiment of this application Figure 3 shown.
[0047] In some embodiments, reference Figure 4 As shown, the tongue support portion 121 is at least arranged corresponding to the position of the teeth in the mandibular posterior teeth area. Specifically, the tongue support portion 121 covers the tooth positions 4-6 of the dentition of the infantile teeth. The advantage of such a design is that the horizontal force applied by the tongue support portion 121 can be maximized, thereby improving the expansion effect.
[0048] In some embodiments, the tangent line at the highest point of the tongue supporting portion 121 in the posterior teeth region is arranged at a preset angle with the sagittal plane, and the preset angle is greater than 0° and less than or equal to 45°, and more preferably, it can be greater than 0° and less than or equal to 30°. Figure 6 As shown, the preset angle is Figure 6 In α, the tangent line at the highest point of the tongue supporting portion 121 is specifically the tangent line at the highest point P of the surface A on the side of the tongue supporting portion 121 adjacent to the lower groove 15. The surface A can be a plane or a curved surface. When the surface A is a plane or a part of a plane, refer to Figure 7 As shown, the tangent line at the highest point of surface A is on the plane; when surface A is a curved surface, refer to Figure 6As shown, the tangent line at the highest point of surface A is the tangent line at the point where the curvature of the curved surface is the largest. Similarly, the surface B of the tongue supporting portion 121 adjacent to the tongue body can be a plane or a curved surface. Preferably, the surface B is designed to be a curved surface such as Figure 6 and Figure 7 As shown, it better matches the shape of the tongue and provides comfort when the tongue is carried.
[0049] In other embodiments, reference Figure 8 As shown, the tangent line at the highest point of the tongue supporting part 121 is specifically the tangent line at the highest point D of the surface B of the tongue supporting part 121 adjacent to the tongue body, and the surface A can be a plane that is parallel to the sagittal plane as a whole, or a curved surface that matches the concave and convex side of the tongue side of the tooth at the corresponding position. The advantage of this design is that after wearing, the surface A can fully contact the tongue side of the tooth at the corresponding position, so that the expansion force can act more fully on the tooth, further improving the correction effect.
[0050] In some embodiments, reference Fig. 9 As shown, in order to improve the strength of the tongue supporting portion 121, so that the muscle force of the tongue can be better transmitted to the teeth, the thickness L1 of the tongue supporting portion 121 in the buccal and lingual direction is greater than the thickness L2 of the inner wall of the remaining part. Further, the thickness L1 of the tongue supporting portion 121 in the buccal and lingual direction ranges from 3mm to 5mm.
[0051] In some embodiments, reference Fig.10 As shown, the relative position relationship between the upper groove 14 and the lower groove 15 is the relationship between the upper and lower jaws of the final correction target, that is, the sagittal upward distance between the positions corresponding to the upper groove 14 and the lower groove 15 in the anterior tooth area corresponds to the coverage relationship of the teeth in the anterior tooth area at the correction target position, and the horizontal upward distance between the upper groove 14 and the lower groove 15 in the posterior tooth area corresponds to the coverage relationship of the posterior teeth at the correction target position. Further explanation: In order to make the dental device 1 contact the lingual side of the teeth in the posterior tooth area of the upper and lower dentitions and apply a horizontal expansion force, the horizontal width of the upper groove 14 and the lower groove 15 in the posterior tooth area is respectively greater than the width of the patient's dentition at the position corresponding to the posterior tooth area so that the patient's lower dental arch is subjected to a horizontal expansion force when wearing it, and the horizontal width of the upper groove 14 and / or the lower groove 15 in the posterior tooth area is 1.05 times to 1.2 times the width of the patient's dentition at the position corresponding to the posterior tooth area. Fig.10 Taking the upper groove 14 as an example, the horizontal width H1 of the posterior tooth area of the upper groove 14 is 1.05 times to 1.2 times the width H2 of the patient's dentition corresponding to the posterior tooth area.
[0052] In some embodiments, reference Fig.11As shown, the inner side of the tongue support portion 121 is provided with a ridge structure 16 for guiding the tongue to lick, and the ridge structure 16 protrudes to the tongue side with a height between 3mm and 6mm. Furthermore, the ridge structure 16 is provided on both sides of the mandibular posterior teeth area, and in order to effectively apply horizontal expansion force so that the force application point is closer to the impedance center of the tooth, the ridge structure 16 is provided at the tooth crown close to the gingival margin.
[0053] In some embodiments, the ridge structure 16 is integrally formed with the dental device 1, and the dental device 1 is manufactured by using silicone material and injection molding. Models with the ridge structure 16 arranged at different positions are manufactured as needed to obtain dental devices 1 for different correction schemes.
[0054] In addition, the ridge structure 16 is connected to the tongue supporting portion 121 separately, see Fig.12 As shown, the ridge structure 16 is fixed to the surface of the tongue supporting portion 121 by bonding. Fig.13 As shown, the ridge structure 16 is fixed to the surface of the tongue supporting portion 121 by a clamping method. In the case of a separate connection, the ridge structure 16 can be made of a different material from the tongue supporting portion 121, or have a different mechanical strength from the tongue supporting portion 121. Preferably, the mechanical strength of the ridge structure 16 is greater than the mechanical strength of the tongue supporting portion 121, so that the force of the labiolingual muscles can be transmitted to the teeth more fully.
[0055] Another embodiment of the present application provides a dental system, including a series of dental instruments, which are designed to gradually implement a treatment plan. The treatment plan can be divided into multiple treatment stages, and the inter-jaw relationship can be gradually brought to a target position according to different treatment needs. Fig.14 As shown, a series of dental instruments at least includes a first dental instrument 100 and a second dental instrument 200, wherein the first dental instrument 100 and the second dental instrument 200 are respectively the dental instruments described in any one of the above, wherein a tangent line at the highest point of a first tongue supporting portion of the first dental instrument 100 at a position in the posterior teeth region has a first angle with a sagittal plane, and a tangent line at the highest point of a second tongue supporting portion of the second dental instrument 200 at a position in the posterior teeth region has a second angle with a sagittal plane, and the first angle is different from the second angle.
[0056] In some embodiments, reference Fig.15As shown, the correction stage corresponding to the second dental appliance 200 is a subsequent stage of the correction stage corresponding to the first dental appliance 100, and the correction stage corresponding to the second dental appliance 200 and the correction stage corresponding to the first dental appliance 100 are the second half of the correction stage. As the correction process progresses, the dental arch shape of the dentition is gradually corrected to the correct position, and there is no need to apply excessive expansion force to the dentition. The second angle γ between the tangent line at the highest point of the second tongue supporting portion of the second dental appliance 200 at the posterior tooth area and the sagittal plane can be designed to be greater than the first angle σ between the tangent line at the highest point of the first tongue supporting portion of the first dental appliance 100 at the posterior tooth area and the sagittal plane.
[0057] In some embodiments, reference Fig.16 As shown, the correction stage corresponding to the second dental appliance 200 is a subsequent stage of the correction stage corresponding to the first dental appliance 100, and the correction stage corresponding to the second dental appliance 200 and the correction stage corresponding to the first dental appliance 100 are the first half of the correction stage. In order to avoid excessive correction force in the early stage of correction, which may cause discomfort to the patient, the correction stage corresponding to the first dental appliance 100 and the correction stage corresponding to the second dental appliance 200 are designed to gradually increase the expansion force, that is, the second angle γ between the tangent line at the highest point of the second tongue supporting portion of the second dental appliance 200 at the posterior teeth position and the sagittal plane can be designed to be smaller than the first angle σ between the tangent line at the highest point of the first tongue supporting portion of the first dental appliance 100 at the posterior teeth position and the sagittal plane.
[0058] 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 after such combination are all within the protection scope of the present utility model. In order to save the length of the application text, they will not be described in detail here.
[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
[0060] Similarly, the above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A dental instrument, characterized in that: The dental device includes a bearing portion that contacts at least part of the teeth, the lingual edge of the bearing portion extends toward the gums to form an inner wall located on the lingual side of the dental arch, and the labial and buccal edges of the bearing portion extend toward the gums to form an outer wall, and when worn, the outer wall contacts the labial and buccal muscles; the outer wall, the bearing portion, and the inner wall form an upper groove that defines the upper dental arch and a lower groove that defines the lower dental arch; at least part of the inner wall extends toward the lingual side from a position adjacent to the lower groove to the terminal lower edge to form a tongue supporting portion, and the tongue supporting portion is inclined relative to the sagittal plane as a whole, and when worn, the tongue supporting portion is used to carry the tongue to the corresponding position of the lower dentition and apply a horizontal expansion force to the lower dentition through the tongue.
2. The dental apparatus according to claim 1, characterized in that The tongue supporting portion is at least arranged corresponding to the position of the teeth in the mandibular posterior tooth area.
3. The dental apparatus according to claim 2, characterized in that The tangent line at the highest point of the tongue supporting portion in the posterior tooth area is arranged at a preset angle with the sagittal plane, and the preset angle is greater than 0° and less than or equal to 45°.
4. The dental apparatus according to claim 1, wherein: The thickness of the tongue supporting portion in the buccal and lingual directions is greater than the thickness of the inner side wall of the remaining portion.
5. The dental apparatus according to claim 4, characterized in that: The thickness of the tongue supporting portion in the buccal-lingual direction ranges from 3 mm to 5 mm.
6. The dental apparatus according to claim 1, wherein: The horizontal width of the lower groove in the posterior tooth area is greater than the width of the patient's dentition at the position corresponding to the posterior tooth area so that the patient's lower dental arch is subjected to a horizontal expansion force when wearing the mask.
7. The dental apparatus according to claim 6, characterized in that The horizontal width of the upper groove or the lower groove in the posterior tooth area is 1.05 times to 1.2 times the width of the patient's dentition at the position corresponding to the posterior tooth area.
8. The dental apparatus according to claim 1, wherein: The inner side surface of the tongue supporting portion is provided with a ridge structure for guiding the tongue to lick.
9. The dental apparatus according to claim 8, characterized in that The protrusion height of the ridge structure toward the tongue side is between 3mm and 6mm.
10. The dental apparatus according to claim 6, characterized in that The ridge structure is arranged corresponding to the crown of the tooth close to the gingival margin.
11. The dental apparatus according to claim 8, characterized in that The ridge structure and the tongue supporting portion are connected separately.
12. The dental apparatus according to claim 8, wherein: The ridge structure is fixed to the surface of the tongue supporting part by bonding.
13. A dental system, comprising at least a first dental instrument and a second dental instrument, wherein the first dental instrument and the second dental instrument are dental instruments according to any one of claims 1 to 12, respectively, A tangent line at the highest point of the first tongue supporting portion of the first dental instrument in the posterior teeth area has a first angle with the sagittal plane, and a tangent line at the highest point of the second tongue supporting portion of the second dental instrument in the posterior teeth area has a second angle with the sagittal plane, and the first angle is different from the second angle.
14. The dental system according to claim 13, wherein: The second dental appliance corresponds to a treatment stage that is a subsequent stage to the treatment stage corresponding to the first dental appliance, and the second angle is greater than the first angle.