Shell-shaped dental instrument with traction structure
By setting through holes and installation channels on the side walls of the cavity of the invisible orthodontic appliance, the problems of traction hook lifting and falling off are solved, achieving stable traction force and improved orthodontic effect.
Patent Information
- Application Number
- CN202422597761.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The traction hooks of existing invisible braces are prone to warping and the traction parts are easily detached, which affects the patient's experience and the correction effect.
A shell-shaped dental instrument is designed by setting through holes and installation channels on the sidewall of the cavity. The long axis of the installation channel is different from the traction direction, forming a large area of the first sidewall to withstand the traction force. The through holes are set at a distance away from the occlusal surface to avoid warping and falling off.
It provides stable traction, reduces the risk of damage to the oral mucosa, improves the fit and treatment effect of the appliance, and enhances patient satisfaction.
Smart Images
Figure CN223473906U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of dental orthodontics technology, and specifically relates to a shell-shaped dental instrument with a traction structure. Background Technology
[0002] In the field of orthodontic technology, invisible aligners based on polymer materials are becoming increasingly popular due to their aesthetic appeal, convenience, and ease of cleaning. Invisible aligners are typically a single, integrated shell made of a flexible, transparent polymer material. They form cavities that accommodate multiple teeth, and the geometry of these cavities closely matches the target tooth layout to facilitate tooth movement. The entire treatment process has minimal impact on daily life and social interactions. Furthermore, because patients can remove and wear them themselves, it facilitates daily oral health maintenance, making the entire treatment process even more convenient.
[0003] In clinical orthodontic treatment, functional attachments are sometimes used to enhance the orthodontic or orthognathic treatment using shell-shaped orthodontic appliances. Common functional attachments include traction structures, which suspend traction components so that traction force is applied to the corresponding areas. In many cases, such as anterior tooth intrusion, tooth elongation, gap adjustment, eruption traction, and tooth rotation, traction structures are needed for auxiliary treatment.
[0004] In existing technologies, a small notch (i.e., a traction hook) is made at the gingival margin of the cavity corresponding to the tooth requiring traction on the invisible aligner. When wearing the aligner, the traction element is hooked onto the traction hook for retention, while the other side is hooked onto another traction hook or a lingual clip to achieve traction between teeth or between jaws. However, this method has the following problems: the edge of the resulting traction hook opening is relatively thin, and when the traction force is too great, the edge of the aligner will bulge outward, forming a raised edge that can easily scratch the oral mucosa. Moreover, there is a risk of the traction element falling off, all of which affect the patient's experience and the orthodontic effect.
[0005] Therefore, it is necessary to provide a shell-shaped dental instrument that is more comfortable and can stably provide traction, thereby improving orthodontic accuracy. Utility Model Content
[0006] The technical problem solved by this utility model is to overcome the defects of the existing technology and provide a shell-shaped dental instrument with a traction structure. After the traction component is hooked, it is not easy for the edge to lift up and the traction component is not easy to fall off. It can stably provide traction force, which is conducive to the realization of orthodontic effect and can improve patient satisfaction.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A shell-shaped dental instrument with a traction structure includes a shell-shaped orthodontic appliance and a traction hook integrally disposed on the shell-shaped orthodontic appliance. The shell-shaped orthodontic appliance has a cavity for accommodating a patient's teeth. The traction hook is formed on the sidewall of the cavity and is used to cooperate with a traction member to obtain traction force in the desired traction direction. The sidewall of the cavity has a through hole penetrating the inner and outer surfaces of the sidewall of the cavity and an installation channel with one end communicating with the through hole. The other end of the installation channel extends to the gingival edge of the sidewall of the cavity. The traction member enters through the installation channel and hooks into the through hole. The long axis direction of the installation channel is different from the traction direction. The installation channel and the through hole divide the sidewall of the cavity into a first sidewall and a second sidewall along the long axis direction of the installation channel. The area of the first sidewall is greater than or equal to the area of the second sidewall. Furthermore, the width dimension of the installation channel in the direction perpendicular to its long axis direction is smaller than the characteristic diameter dimension of the through hole. The first sidewall forms the traction hook.
[0009] Preferably, the through hole is located adjacent to the occlusal surface, and the side of the through hole away from the mounting channel is located at a preset distance from the occlusal surface in the gingival-occlusal direction, wherein the preset distance is 2mm-3mm.
[0010] Preferably, the mounting channel extends from the gingival edge of the cavity sidewall to the side of the through hole adjacent to the mounting channel, wherein the width of the mounting channel in the direction perpendicular to its long axis is 0-1 mm.
[0011] Preferably, the width of the mounting channel in the direction perpendicular to its long axis is 0-0.5 mm.
[0012] Preferably, the height of the through hole along the gingival direction is 1 / 10 to 1 / 5 of the height of the tooth surface enclosed by the cavity.
[0013] Preferably, the characteristic diameter of the through hole is 1mm-2mm.
[0014] Preferably, the shape of the through hole projected onto the tooth surface of the tooth enclosed by the cavity is circular, elliptical, or polygonal.
[0015] Preferably, the long axis of the installation channel is angled to the traction direction.
[0016] Preferably, the angle is 15°-180°.
[0017] Preferably, the shell-shaped dental appliance includes a maxillary shell-shaped dental appliance and / or a mandibular shell-shaped dental appliance, and the traction hook is disposed on the cavity sidewall of the maxillary shell-shaped dental appliance and / or the mandibular shell-shaped dental appliance.
[0018] Compared with the prior art, the present invention, by adopting the above technical solution, has at least one of the following beneficial effects:
[0019] (1) The shell-shaped dental instrument provided by this utility model has a small-width installation channel connected to a through hole. The traction component passes through the deformation of the installation channel. In addition, the long axis of the installation channel is set in a different direction from the traction direction. When traction is applied, the installation channel is not easily deformed when it is not under force, so the traction component hooked in the through hole is not easily detached from the through hole, avoiding the risk of dislodgement. Moreover, the first side wall area used to bear the traction force is large, so it is not easy to lift the edge when traction is applied, reducing the possibility of damage to the patient's oral mucosa. On the other hand, the small-width installation channel causes less damage to the gingival end of the shell-shaped orthodontic appliance and has less impact on the wrapping force of the shell-shaped orthodontic appliance on the teeth, so it will not affect the orthodontic effect of the shell-shaped orthodontic appliance.
[0020] (2) By designing the long axis direction of the installation channel and the traction direction at an angle α, this utility model avoids the long axis direction and the traction direction being set in the same direction, thus avoiding the risk that the traction member hooked in the through hole will come out of the installation channel and the through hole along the long axis direction after being subjected to force, thereby ensuring that the traction member can be stably hooked in the through hole.
[0021] (3) By setting the through hole away from the installation channel at a preset distance h from the occlusal surface on the gingival-occlusal side, this utility model ensures that the through hole is not too close to the occlusal surface and will not be damaged by the biting force of the opposing jaw when in contact with the opposing jaw, thus affecting the wrapping force and orthodontic effect of the shell-shaped orthodontic appliance. On the other hand, within this preset distance range, the through hole will not be too close to the gingival edge of the cavity, thus avoiding the problems of edge lifting, deformation, and traction component falling off during the wearing of the shell-shaped orthodontic appliance. Attached Figure Description
[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same numerical reference numerals are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.
[0023] Figure 1 This is a schematic diagram of the shell-shaped dental instrument in Embodiment 1 of this utility model;
[0024] Figure 2 This is a schematic diagram of the through hole and mounting channel in Embodiment 1 of this utility model;
[0025] Figure 3for Figure 1 A magnified view of a portion of region A in the middle;
[0026] Figure 4 This is a schematic diagram of another through hole structure in Embodiment 1 of this utility model;
[0027] Figure 5 This is a schematic diagram of the shell-shaped dental instrument in use according to Embodiment 1 of this utility model;
[0028] Figure 6 This is a schematic diagram of the shell-shaped dental instrument in use according to Embodiment 2 of this utility model;
[0029] Figure 7 This is a schematic diagram of the shell-shaped dental instrument in use according to Embodiment 3 of this utility model. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model.
[0031] The directional terms "up," "down," "left," and "right" used in this article refer to the directions shown in the accompanying drawings and do not imply any special limitations.
[0032] The term "posterior tooth region" mentioned in the various embodiments of this utility model is defined according to the classification of teeth in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38. It includes premolars and molars, teeth marked as 4-8 using the FDI notation, and teeth marked as 1-3 using the FDI notation for the anterior tooth region. The teeth in the anterior tooth region include the central incisors, lateral incisors, and canines.
[0033] As the background technology shows, the traction hooks set on the clear aligners are mainly formed by making a small notch at the edge of the cavity corresponding to the tooth position that needs to be traction on the clear aligner near the gum line. When wearing the aligner, the traction element is hung on the traction hook to achieve traction retention. However, the traction hook formed by this method has a thin opening edge. When the traction force is too large, the edge of the aligner will bulge outward, forming a raised edge, which can easily scratch the oral mucosa. Moreover, there is a risk that the traction element will fall off, all of which will affect the patient's experience and the orthodontic effect.
[0034] Based on this, the applicant proposes a shell-shaped dental instrument with a traction structure, comprising a shell-shaped orthodontic appliance and a traction hook integrally disposed on the shell-shaped orthodontic appliance. The shell-shaped orthodontic appliance has a cavity for accommodating the patient's teeth. The traction hook is formed on the side wall of the cavity and is used to cooperate with a traction member to obtain traction force in the desired traction direction. The side wall of the cavity is provided with a through hole penetrating the inner and outer surfaces of the side wall of the cavity and an installation channel having one end connected to the through hole. The other end of the installation channel extends to the gingival edge of the side wall of the cavity. The traction member enters through the installation channel and hooks into the through hole. The long axis direction of the installation channel is different from the traction direction. The installation channel and the through hole divide the side wall of the cavity into a first side wall on the same side as the traction direction and a second side wall on the opposite side of the traction direction along the long axis direction of the installation channel. The area of the first side wall is greater than or equal to the area of the second side wall. Furthermore, the width dimension of the installation channel in the direction perpendicular to its long axis direction is smaller than the characteristic diameter dimension of the through hole. The first side wall forms the traction hook.
[0035] Example 1
[0036] Please refer to Figure 1As shown. This application provides a shell-shaped dental instrument 100 with a traction structure, including a shell-shaped orthodontic appliance 10 and a traction hook integrally disposed on the shell-shaped orthodontic appliance 10. The shell-shaped orthodontic appliance 10 is integrally made of an elastic transparent polymer material and has a cavity 20 for accommodating the patient's teeth. The geometry of the cavity 20 is substantially consistent with the teeth under the corresponding target layout to realize the movement of the teeth. The corresponding target layout can be any orthodontic target, which can be a stage orthodontic target or a final orthodontic target. The traction hook described in this application is formed on the sidewall of the cavity 20 and is used to cooperate with the traction member to obtain the required traction force in the traction direction X. The sidewall of the cavity 20 is provided with a through hole 21 penetrating the inner and outer surfaces of the sidewall and an installation channel 22 connected at one end to the through hole 21. The other end of the installation channel 22 extends to the gingival edge of the sidewall of the cavity 20. The end of the installation channel 22 at the gingival edge is an open structure, and the width D of the installation channel 22 in the direction Z perpendicular to its long axis Y is significantly smaller than the characteristic diameter R of the through hole 21. Specifically, in this embodiment, the through hole 21 is projected onto the cavity. The tooth surface of the enclosed tooth is circular, and the characteristic diameter R is the diameter of this circle. When hooking the traction member, the sidewalls of the cavities 20 on both sides of the mounting channel 22 need to be deformed in a direction away from each other so that the traction member can enter the mounting channel 22 and pass from the first end opening of the mounting channel 22 to the second end opening of the mounting channel 22. The first end opening of the mounting channel 22 is located at one end of the gingival margin, and the second end opening of the mounting channel 22 is the opening at one end connected to the through hole 21. The mounting channel 22 allows the traction member to pass through, enter, and hook into the through hole 21. The long axis direction Y of the mounting channel 22 is different from the traction direction X. The mounting channel 22 and the through hole 21 divide the sidewall of the cavity 20 into a first sidewall 30 and a second sidewall 40 along the long axis direction Y of the mounting channel 22. The area of the first sidewall 30 is greater than or equal to the area of the second sidewall 40. The first sidewall 30 forms the traction hook of this application. Further, the traction direction X is obtained through medical design based on the patient's actual condition. When the traction member is pulled in the traction direction X, the first sidewall 30 acts as a whole to bear the traction force from the traction direction X, that is, the first sidewall 30 as a whole forms the traction hook. This design eliminates the need to install and fix other accessory devices on the cavity of the shell-shaped orthodontic appliance 10, simplifying processing and reducing labor and material costs.Furthermore, in existing technologies, the traction hook opening at the gingival margin of the shell-shaped orthodontic appliance is relatively wide, causing greater damage to the appliance 10 and reducing its wrapping force on the teeth, thus affecting the orthodontic effect. The wider opening also poses a risk of the traction element detaching from the opening. In this application, a narrower mounting channel is connected to the through hole. The traction element passes through the deformation of the mounting channel. The long axis of the mounting channel is designed to be opposite to the traction direction. During traction, the mounting channel is less prone to deformation when not under stress, thus preventing the traction element hooked in the through hole from detaching and avoiding the risk of detachment. On the other hand, the narrower mounting channel causes less damage to the gingival margin of the shell-shaped orthodontic appliance 10 and has less impact on its wrapping force on the teeth, thus not affecting the orthodontic effect.
[0037] For further explanation, please refer to [link / reference]. Figure 2 As shown, the mounting channel 22 extends from the gingival edge of the sidewall of the cavity 20 to the side where the through hole 21 is connected to the mounting channel 22, wherein the width dimension D of the mounting channel 22 in the direction Z perpendicular to its long axis Y is 0-1mm. In one embodiment, when making the dental model prototype, at the corresponding position where the through hole 21 needs to be formed, an accessory identical to the through hole 21 can be added to or directly printed on the dental model prototype. This accessory is either concave or convex and is set at the corresponding position on the dental model prototype. Then, through a hot-pressing film process, a shell-shaped orthodontic appliance 10 with convex or concave parts is formed on the dental model prototype by pressing and cutting. After removing the shell-shaped orthodontic appliance 10, the through hole 21 is cut at the position of the convex or concave part, and then the opening is directly cut after pressing to complete the process. The installation channel 22 is formed by cutting an opening from the through hole 21 to the gingival edge of the cavity 20 where the through hole 21 is located using orthodontic cutting forceps. Without considering mechanical wear, an installation channel with a width dimension of 0 can be formed at this time. When the width dimension D is 0, the cavity 20 will not affect the area of the tooth covering and has little impact on the covering force of the shell-shaped orthodontic appliance 10, which is conducive to the realization of the orthodontic effect. In another embodiment, to facilitate the hooking of the traction component, the mounting channel 22 has a certain width in a direction perpendicular to its long axis, for example, D = 1 mm. This size design facilitates the insertion of the traction component. In yet another embodiment, the width dimension D in this application can be designed to be 0.5 mm. This size design can achieve a balance between the cavity's containment force and the ease of hooking the traction component, thus obtaining a better effect.
[0038] Further reading is available here. Figure 1 and Figure 2As shown, the major axis direction Y of the mounting channel 22 is set at an angle α to the traction direction X. As mentioned earlier, the traction direction X is different from the major axis direction Y of the mounting channel 22, i.e., α > 0. This setting can prevent the traction member hooked in the through hole 21 from detaching from the mounting channel 22 after being subjected to force. In a preferred embodiment, the angle α ranges from 15° to 180°. When α is 180°, that is, the traction direction X is completely opposite to the major axis direction Y of the mounting channel 22, the traction member cannot detach in the major axis direction of the mounting channel 22, and the traction member can be stably hooked in the through hole 21. It is understood that when the value of α is small, the traction direction X tends to be closer to the long axis direction Y of the mounting channel 22. When traction is applied in the traction direction X, there is a risk that the traction member will come out of the mounting channel 22. In the design, a suitable value of α can be designed to ensure reliable hooking of the traction member. In another embodiment, the angle α can be 15°.
[0039] Further, please see Figure 3 As shown, the through hole 21 is located adjacent to the occlusal surface, and the side of the through hole 21 away from the mounting channel 22 is positioned at a predetermined distance h from the occlusal surface in the gingival-occlusal direction. Further, in designing the predetermined distance h in this application, a point is taken as the location closest to the occlusal surface in the gingival-occlusal direction on the side of the through hole 21 away from the mounting channel 22, and the distance from this point to the occlusal surface is the predetermined distance h described in this application. Further explanation is that the predetermined distance h can be in the vertical direction or along the long axis of the tooth at the corresponding position, and is the distance between the lowest point of the edge of the through hole 21 and the corresponding point on the occlusal surface. The predetermined distance h is 2mm-3mm. The test verification of this application shows that the preset distance h within this range ensures that, on the one hand, the through hole 21 is not too close to the occlusal surface, and will not be damaged by the occlusal force of the opposing jaw when in contact with the opposing jaw, thus affecting the wrapping force and orthodontic effect of the shell-shaped orthodontic appliance 10. On the other hand, within this preset distance range, the through hole 21 is also not too close to the gingival edge of the cavity 20, thus avoiding problems such as edge warping, deformation, and traction component detachment during the wearing of the shell-shaped orthodontic appliance 10.
[0040] Further reading is available here. Figure 3As shown, the height H of the through hole 21 along the gingival direction is 1 / 10 to 1 / 5 of the height of the tooth surface enclosed by the cavity 20. The height of the tooth surface is the height of the tooth along its long axis. Further, the height H of the through hole 21 is the height from the end of the through hole 21 near the occlusal surface to the end near the gingival line along the long axis of the tooth at the corresponding position of the through hole 21. If the through hole height is too small, it is difficult to process. Taking the hot-pressing process as an example, when forming the through hole 21 by cutting at the corresponding position of the cavity of the shell-shaped orthodontic appliance 10, if the height H is less than 1 / 10 of the height of the tooth surface enclosed by the cavity 20, the overall size of the through hole will not meet the requirements of the traction component due to residual cutting material. During the design process, the inventors also discovered that other auxiliary orthodontic attachments may be designed on the patient's tooth surface during orthodontic treatment. If the height dimension H of the through hole 21 is designed to be too large, exceeding 1 / 5 of the height dimension of the tooth surface covered by the cavity 20, it will cause interference with other attachments and affect the achievement of the orthodontic effect.
[0041] Further reading is available here. Figure 2 and Figure 3 And in conjunction with reference Figure 4 As shown, the shape of the through hole 21 projected onto the tooth surface of the tooth enclosed by the cavity is circular, elliptical, or polygonal. Figure 4 The shape shown is one of the pentagons. In addition, the shape of the through hole 21 projected onto the tooth surface of the tooth covered by the cavity can also be some irregular shapes, as long as it meets the following requirements: it can be connected to the installation channel, and the through hole structure can pass through the installation through hole and hook the traction member.
[0042] In a preferred embodiment, please continue reading Figures 2 to 4 As shown, the characteristic diameter R of the through hole 21 is 1mm-2mm. Further explanation: In this application, the characteristic diameter R is such that the traction member can be accommodated and stably hooked into the through hole 21 without deformation. Specifically, when the shape of the through hole 21 projected onto the tooth surface enclosed by the cavity is circular, the characteristic diameter R is the diameter of that circle (e.g., ...). Figure 2 (as shown); when the shape of the through hole projected onto the tooth surface of the tooth enclosed by the cavity is elliptical, the characteristic diameter R is the minor axis of the ellipse (e.g., Figure 3 (as shown); when the shape of the through hole 21 projected onto the tooth surface of the tooth enclosed by the cavity is polygonal, the characteristic diameter R is the diameter of the circumcircle of the polygon (e.g., Figure 4 (As shown).
[0043] For further explanation, please refer to Figure 5 As shown, in this embodiment, the shell-shaped dental appliance 100 with a traction structure can be used for single-jaw application. For opposing jaws, it can be used in conjunction with implants or a shell-shaped orthodontic appliance 102 with other types of traction hooks 60 for traction. The shell-shaped orthodontic appliance 10 is a maxillary shell-shaped orthodontic appliance that accommodates the patient's maxillary teeth, and the traction hook is formed on the cavity sidewall corresponding to the anterior teeth of the maxillary shell-shaped orthodontic appliance. In another embodiment, the traction hook can also be formed on the cavity sidewall corresponding to the posterior teeth of the maxillary shell-shaped orthodontic appliance, depending on the orthodontic needs. It is understood that, depending on the orthodontic needs, the shell-shaped orthodontic appliance 10 in this embodiment can also be a mandibular shell-shaped orthodontic appliance that accommodates the patient's mandibular teeth, and the traction hook is formed on the cavity sidewall corresponding to the anterior teeth of the mandibular shell-shaped orthodontic appliance; in another embodiment, the traction hook can also be formed on the cavity sidewall corresponding to the posterior teeth of the mandibular shell-shaped orthodontic appliance, depending on the orthodontic needs.
[0044] Example 2
[0045] Please refer to Figure 6 As shown. In this embodiment, the shell-shaped dental appliance 100 with traction structure is used for bimaxillary use, and the opposing jaw is also tractioned using the traction hook described in this application. The shell-shaped orthodontic appliance in this embodiment includes a maxillary shell-shaped orthodontic appliance 101 and a mandibular shell-shaped orthodontic appliance 102, which can respectively accommodate the patient's maxillary and mandibular teeth. The labial and buccal sides of the maxillary shell-shaped orthodontic appliance 101 and the mandibular shell-shaped orthodontic appliance 102 are respectively formed on the cavity sidewalls corresponding to the anterior teeth on both sides of the maxillary shell-shaped orthodontic appliance 101 and the cavity sidewalls corresponding to the posterior teeth on both sides of the mandibular shell-shaped orthodontic appliance 102. When the rubber band 50 is hooked, it can assist in pushing the molars backward for adjustment, and is used for traction of Class II malocclusion, mainly for cases of "overbite", to help the patient's upper teeth retract and the mandible move forward.
[0046] Example 3
[0047] Please refer to Figure 7As shown. In this embodiment, the shell-shaped dental instrument 100 with traction structure is used for bimaxillary use, and the opposing jaw is also tractioned using the traction hooks described in this application. The difference between this embodiment and Embodiment 2 is that the traction hooks on the labial and buccal sides of the maxillary shell-shaped dental appliance 101 and the mandibular shell-shaped dental appliance 102 are respectively formed on the cavity sidewalls corresponding to the posterior teeth on both sides of the maxillary shell-shaped dental appliance 101 and the cavity sidewalls corresponding to the anterior teeth on both sides of the mandibular shell-shaped dental appliance 102; when the rubber band 50 is hooked, it can assist in pushing the molars backward for adjustment, and is used for traction of Class III malocclusion, mainly for cases of "underbite", helping to pull the mandible back and the maxilla forward.
[0048] To further explain, the traction hook of the shell-shaped dental instrument of this application can be formed on the labial cavity sidewall, the buccal cavity sidewall, or the lingual cavity sidewall, to satisfy any traction form required during orthodontic treatment other than the traction methods described in embodiments one, two, and three above, such as intermaxillary vertical traction, anterior oblique traction, intermaxillary interactive traction, or anterior quadrilateral traction, etc., which are not listed one by one in this application.
[0049] It should be noted that the above embodiments can be freely combined as needed to form different new implementation schemes without causing contradictions. All implementation schemes formed by such combinations are within the protection scope of this application. In order to save space in the application text, they will not be described in detail here.
[0050] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the inventive principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this application.
[0051] Similarly, the above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A shell-shaped dental instrument with a traction structure, comprising a shell-shaped orthodontic appliance and a traction hook integrally disposed on the shell-shaped orthodontic appliance, the shell-shaped orthodontic appliance having a cavity for accommodating a patient's teeth, the traction hook being formed on the cavity sidewall for cooperating with a traction element to obtain a traction force in the desired traction direction, characterized in that, The cavity sidewall is provided with a through hole penetrating the inner and outer surfaces of the cavity sidewall and an installation channel connected to the through hole at one end. The other end of the installation channel extends to the gingival edge of the cavity sidewall. The traction member enters through the installation channel and hooks into the through hole. The long axis of the installation channel is different from the traction direction. The installation channel and the through hole divide the cavity sidewall into a first sidewall and a second sidewall along the long axis of the installation channel. The area of the first sidewall is greater than or equal to the area of the second sidewall. Furthermore, the width of the installation channel in the direction perpendicular to its long axis is smaller than the characteristic diameter of the through hole. The first sidewall forms the traction hook.
2. The shell-shaped dental instrument with a traction structure according to claim 1, characterized in that, The through hole is located adjacent to the occlusal surface, and the side of the through hole away from the installation channel is set at a preset distance from the occlusal surface in the gingival-occlusal direction, wherein the preset distance is 2mm-3mm.
3. The shell-shaped dental instrument with a traction structure according to claim 1 or 2, characterized in that, The mounting channel extends from the gingival edge of the cavity sidewall to the side of the through hole adjacent to the mounting channel, wherein the width of the mounting channel in the direction perpendicular to its long axis is 0-1 mm.
4. The shell-shaped dental instrument with a traction structure according to claim 3, characterized in that, The width of the mounting channel in the direction perpendicular to its long axis is 0-0.5 mm.
5. The shell-shaped dental instrument with a traction structure according to claim 1, characterized in that, The height of the through hole along the gingival direction is 1 / 10 to 1 / 5 of the height of the tooth surface enclosed by the cavity.
6. The shell-shaped dental instrument with a traction structure according to claim 1, characterized in that, The characteristic diameter of the through hole is 1mm-2mm.
7. The shell-shaped dental instrument with a traction structure according to claim 4, characterized in that, The shape of the through hole projected onto the tooth surface enclosed by the cavity is circular, elliptical, or polygonal.
8. The shell-shaped dental instrument with a traction structure according to claim 1, characterized in that, The long axis of the installation channel is set at an angle to the traction direction.
9. The shell-shaped dental instrument with a traction structure according to claim 8, characterized in that, The angle is 15°-180°.
10. The shell-shaped dental instrument with a traction structure according to claim 1, characterized in that, The shell-shaped dental appliance includes a maxillary shell-shaped dental appliance and / or a mandibular shell-shaped dental appliance, and the traction hook is disposed on the cavity sidewall of the maxillary shell-shaped dental appliance and / or the mandibular shell-shaped dental appliance.