Correction system for tooth movement
The design of the shell-shaped body and long-arm attachment combined with the guide wire solves the problem of unstable movement of adjacent teeth in the tooth gap, achieves stable overall movement of teeth and efficient correction, and avoids crown tilting and appliance falling off.
Patent Information
- Application Number
- CN202422379220.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In existing orthodontic treatment technologies, the movement of teeth adjacent to the gap is unstable, and the crowns are prone to tilting or the appliance falling off, resulting in poor treatment effects. Especially in invisible orthodontic treatment, the force is discontinuous, making it difficult to effectively close the tooth gap.
The design adopts a shell-like body and a long-arm attachment combined with a guide wire. The long-arm attachment includes an adhesive part and an extension part. The adhesive part is bonded to the tooth, and the extension part faces the gum. The guide wire passes through the through-hole structure. The shell-like body applies correction force to move the tooth along the direction of the guide wire, thereby increasing the correction force and retention force and avoiding the crown from tilting.
It improves the stability and efficiency of tooth movement, avoids crown tilt and appliance falling off, strengthens the retention force between the appliance and the teeth, and improves the treatment effect.
Smart Images
Figure CN223336222U_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 correction system for tooth movement. Background Art
[0002] In the field of orthodontics, clinicians often encounter problems such as gaps after tooth extraction, recurrence of gaps during the retention period, or other congenital diastemas. In the field of fixed orthodontics, straight wire appliances or square wire appliances are generally used to close tooth gaps. Square wire appliances are traditional orthodontic appliances. The brackets on each tooth are the same, and the archwire must be bent in three sequences to compensate for the differences in tooth shape and position. This is relatively complex in clinical operation, and the bending of the archwire can sometimes lead to errors due to the doctor's lack of clinical experience, resulting in poor treatment results. Straight wire appliances eliminate the three sequences of archwire bending by improving the structure of the bracket base. Since the size, shape and torsion of each person's teeth vary greatly, the bracket base structure must also be modified according to different dental conditions. However, customized brackets for individuals increase the cost of treatment and are not universally applicable.
[0003] In recent years, invisible braces have gradually become well-known to everyone, and are loved by many patients due to their invisible and beautiful features. In existing orthodontic treatments, for cases of tooth extraction to close gaps, both traditional fixed braces and invisible braces apply force to the crowns, and then the movement of the crowns drives the movement of the roots, so the movement of the roots lags behind the movement of the crowns. When the crowns tilt toward the gap, for invisible braces, due to insufficient friction between the invisible braces and the teeth, the braces may fall off the teeth, resulting in interruption of the correction. In addition, the force applied by the invisible braces is not continuous. When the force of the invisible braces is reduced, the roots may not move into place, resulting in a "roller coaster" phenomenon, which leads to treatment failure and greater difficulty for secondary correction. Utility Model Content
[0004] The technical problem solved by the present invention is to overcome the defects of the existing technology and provide a correction system for tooth movement that can close the gap, avoid or reduce the problem of adjacent teeth at the gap tilting toward the gap, and at the same time increase the movement force applied by the shell-shaped body and the tooth movement during the correction process, thereby improving the correction efficiency.
[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a correction system for tooth movement, comprising a shell-shaped body having multiple tooth receiving cavities, a long arm attachment and a guide wire, the long arm attachment comprising a connected bonding portion and an extension portion, the bonding portion comprising a bonding surface and a first surface arranged opposite to each other, the extension portion comprising a non-bonding surface and a second surface arranged opposite to each other, when the bonding surface is bonded to the tooth, the non-bonding surface faces the gum and is arranged at a distance from the corresponding gum, the first surface and the second surface face the inner surface of the shell-shaped body, a through hole structure for passing the guide wire is provided on the mesiodistal side of the bonding portion and / or the extension portion, the shell-shaped body has an attachment cavity that wraps the bonding portion and at least part of the extension portion, when worn, the attachment cavity applies correction force to the long arm attachment to make the tooth bonded with the long arm attachment move along the guide direction of the guide wire.
[0006] Preferably, the gingival end of the tooth receiving cavity extends toward the gingival side to form an extension portion, and the accessory cavity includes a tooth accessory cavity arranged in the tooth receiving cavity and used to wrap the bonding portion, and a gingival accessory cavity arranged in the extension portion and used to wrap the extension portion, and the tooth accessory cavity and the gingival accessory cavity are connected.
[0007] Preferably, when the through-hole structure is located at the bonding portion, a groove for accommodating the guide wire is provided on the inner surface of the shell-like body.
[0008] Preferably, there is a clearance fit between the groove and the guide wire.
[0009] Preferably, the gum attachment cavity wraps a portion of the extension, and the through-hole structure is provided on the portion of the extension that is not wrapped.
[0010] Preferably, the through hole structure is located at the free end of the extension portion, and the through hole structure is provided with an opening portion facing the gum.
[0011] Preferably, it further comprises a fixing portion located at the free end of the guide wire for fixing on the tooth, and the fixing portion is located on other teeth of the dental jaw where the tooth is located and the tooth receiving cavity encloses the tooth.
[0012] Preferably, one end of the fixing portion is connected to the guide wire, and the other end forms a hooking structure; the hooking structure can be hooked on other teeth in the dental jaw where the tooth is located in the tooth receiving cavity.
[0013] Preferably, it further includes a fixing portion located at the free end of the guide wire for fixing on the teeth, and an avoidance structure is provided on the shell-like body corresponding to the fixing portion and the guide wire. When worn, the avoidance structure does not contact the guide wire and the fixing portion.
[0014] Preferably, the fixing portion is a bracket bonded to the surface of the tooth, and the guide wire is fixed in the archwire slot of the bracket.
[0015] Preferably, it further comprises an anchor portion for fixing in the gum area, and the free end of the guide wire is connected to the anchor portion.
[0016] Compared with the prior art, the present invention provides a tooth movement correction system that:
[0017] The orthodontic system for tooth movement in the present application includes a shell-shaped body, a long-arm attachment, and a guide wire, wherein the long-arm attachment includes an adhesive portion corresponding to the crown portion and an extension portion corresponding to the gingival portion, and a through-hole structure for passing the guide wire is provided on the mesiodistal side of the adhesive portion and / or the extension portion. When worn, the attachment cavity on the shell-shaped body applies a corrective force to the long-arm attachment so that the tooth to which the long-arm attachment is bonded moves along the guide direction of the guide wire. Such a setting not only allows the teeth adjacent to the gap to move as a whole during movement, and does not cause only tilting and twisting movement of the crown during movement, but also, compared with traditional attachments that only cover part of the crown, the attachment cavity on the shell-shaped body corresponding to the long-arm attachment has a larger contact area with the long-arm attachment, thereby increasing the corrective force of the shell-shaped body on the tooth to which the long-arm attachment is bonded, and improving the correction efficiency; the undercut setting between the attachment cavity and the long-arm attachment also increases the retention force of the shell-shaped body on the tooth, avoiding the problem of falling off due to insufficient friction between the shell-shaped body and the tooth during the correction process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0019] Figure 1 is a structural diagram of a correction system in Example 1;
[0020] Figure 2 yes Figure 1 A schematic structural diagram of a long arm attachment in an embodiment;
[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the mid-long arm attachment from another perspective;
[0022] Figure 4 This is a schematic diagram of another orthodontic system in Example 1 when the long arm attachment is attached to the tooth surface;
[0023] Figure 5This is a schematic structural diagram of a shell-shaped body in another correction system in Example 1;
[0024] Figure 6 This is a schematic structural diagram of a long-arm attachment in a correction system in Example 2;
[0025] Figure 7 yes Figure 6 Schematic diagram of the structure of the mid-long arm attachment from another perspective;
[0026] Figure 8 is a schematic cross-sectional view of a correction system in Example 2 taken along the longitudinal section of the long arm attachment when worn;
[0027] Figure 9 is a schematic cross-sectional view of another correction system in Example 2 taken along the longitudinal section of the long arm attachment when worn;
[0028] Figure 10 is a schematic structural diagram of another correction system in Example 2;
[0029] Figure 11 is a schematic structural diagram of another correction system in Example 2;
[0030] Figure 12 It is a structural diagram of another correction system in Example 2. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood 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 solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.
[0032] Shell appliances are invisible, aesthetically pleasing mechanical orthodontic devices produced through computer 3D design. They are usually worn on the teeth in the mouth and are made of polymer materials such as TPU, PETG, or a combination of both. They can generate forces to change the deformed jaw, misaligned teeth, and periodontal tissues, which is beneficial to the normal growth and development of the maxillofacial region. Shell appliances use the principles of biomechanics to correct deformed teeth. Through a correction system that includes a series of shell appliances, a gentle and persistent biological force is applied to slowly move the teeth, restore them to their normal position, and align them. During the correction process, other accessories are usually used or different structures are set on the shell appliances to apply additional correction forces to the teeth.
[0033] A technical solution protected by the present application is a correction system for tooth movement, the correction system comprising a shell-shaped body having a plurality of tooth receiving cavities, a long arm attachment and a guide wire, the long arm attachment comprising a connected bonding portion and an extension portion, the bonding portion comprising a bonding surface and a first surface arranged opposite to each other, the extension portion comprising a non-bonding surface and a second surface arranged opposite to each other, when the bonding surface is bonded to the tooth, the non-bonding surface faces the gum and is arranged at a distance from the corresponding gum, the first surface and the second surface face the inner surface of the shell-shaped body, a through hole structure for passing the guide wire is provided on the mesiodistal side of the bonding portion and / or the extension portion, the shell-shaped body has an attachment cavity that wraps the bonding portion and at least part of the extension portion, when worn, the attachment cavity applies a correction force to the long arm attachment so that the tooth bonded with the long arm attachment moves along the guide wire guide direction. This arrangement not only allows the teeth adjacent to the gap to move as a whole along the direction of the archwire guide during movement, but also prevents the crown from tilting during movement, thus avoiding the "roller coaster" problem during correction. In addition, compared to traditional accessories that only cover part of the crown, the accessory cavity on the shell body corresponding to the long-arm accessory has a larger contact area with the long-arm accessory, thereby increasing the correction force of the shell body on the teeth bonded to the long-arm accessory and improving correction efficiency. The undercut between the accessory cavity and the long-arm accessory also increases the retention force of the shell body on the teeth, avoiding the problem of the shell body falling off due to insufficient friction between the shell body and the teeth during correction.
[0034] The following describes various embodiments of the present application in conjunction with the accompanying drawings.
[0035] Example 1:
[0036] refer to Figures 1 to 3The tooth movement correction system 100 in the embodiment shown includes a shell-shaped body 1 with multiple tooth receiving cavities, a long arm attachment 2 and a guide wire 3. The shell-shaped body 1 is a shell-shaped orthodontic appliance with correction function. The long arm attachment 2 includes a bonding portion 31 and an extension portion 32 connected to each other. The bonding portion 31 includes a bonding surface 311 and a first surface 312 arranged oppositely. The extension portion 32 includes a non-bonding surface 321 and a second surface 322 arranged oppositely. When the bonding surface 311 is bonded to the tooth, the non-bonding surface 321 is bonded to the tooth. The surface 321 faces the gums and is set at a distance from the corresponding gums. The first surface 312 and the second surface 322 face the inner surface of the shell body 1. The mesiodistal side of the bonding portion 31 is provided with a through-hole structure 33 for passing the guide wire 3. The shell body 1 has an accessory cavity that wraps the bonding portion 31 and at least part of the extension portion 32. When worn, the accessory cavity applies a corrective force to the long arm attachment 2 to make the teeth bonded with the long arm attachment 2 move along the guide direction of the guide wire 3.
[0037] Specifically, continue to refer to Figures 1 to 3 As shown, the bonding portion 31 is the portion of the long-arm attachment 2 fixed to the tooth. The bonding portion 31 can be used to fix the long-arm attachment 2 to the tooth adjacent to the gap that needs to be moved, for example, it can be fixed to the adjacent tooth located in the extraction area. The bonding surface 311 of the bonding portion 31 is similar in shape to the tooth surface and can be bonded and fixed to the tooth surface by light curing. The first surface 312 is the surface that contacts the shell body 1 after the orthodontic patient wears the shell body 1. The extension portion 32 is the portion of the long-arm attachment 2 that extends toward the gum area. The extension portion 32 can effectively increase the length of the attachment. The non-bonding surface 321 of the extension portion 32 faces the gum and has a gap with the gum to avoid discomfort in the gum part due to direct contact with the gum. Compared with traditional attachments bonded to the teeth, the long-arm attachment 2 provided in this embodiment also has a portion corresponding to the gum through the extension portion 32. This increases the effective length of the attachment directly mating with the shell body 1. The attachment's length influences the force or torque generated by the shell body 1 through the attachment, allowing the long-arm attachment 2 to effectively achieve tooth movement. Furthermore, the extension 32 increases the corrective force of the shell body 1 in the tooth root region, bringing the point of force application closer to the tooth's impedance center, resulting in better tooth movement and increased efficiency.
[0038] In practice, the length of the extension portion 32 of the long-arm attachment 2, which corresponds to the gums, can be designed based on the orthodontic patient's gum depth and tolerance. For orthodontic patients with deeper gums and higher tolerance, a longer attachment can be designed. Increasing the length of the portion of the attachment not bonded to the tooth provides a longer lever arm, thereby achieving better tooth movement results.
[0039] In combination with the patient's oral environment, in order to avoid the discomfort caused by the long arm attachment 2 during use, refer to Figure 4 As shown, the distance H between the edge of the adhesive portion 31 close to the gingival margin and the edge of the extension portion 32 away from the gingival margin in the length direction of the long arm attachment 2 can be 8 to 10 mm. In other words, the length of the portion of the long arm attachment 2 that is not bonded to the teeth can be made 8 to 10 mm. Compared with ordinary attachments of about 4 mm, the overall length of the long arm attachment 2 can be increased by more than double. In actual circumstances, the distance between the edge of the adhesive portion 31 close to the gingival margin and the edge of the extension portion 32 away from the gingival margin can be 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm. The above distance values can make the surface of the extension portion 32 that cooperates with the shell-like body 1 near the impedance center of the tooth, thereby making the force applied to the tooth more precise and improving the correction effect.
[0040] Furthermore, a predetermined sagittal distance can be established between the non-adhesive surface 321 and the adhesive surface 311, creating a gingival clearance area. When the adhesive surface 311 is bonded to the tooth, the distance between the non-adhesive surface 321 and the corresponding gingival area is greater than or equal to 1 mm. The distance between the adhesive surface 311 of the extension 32 and the adhesive surface 311 of the adhesive portion 31 allows the extension 32 of the long-arm attachment 2, which corresponds to the gingiva, to maintain a non-contact state with the gingiva. This reduces discomfort experienced by orthodontic patients when using the long-arm attachment 2 for orthodontic treatment. During the manufacturing process of the long-arm attachment 2, the portion of the extension 32 facing the gingiva can be resected, with the sagittal resection depth exceeding 1 mm. In practical situations, the sagittal resection depth of the portion of the extension 32 facing the gingiva can be reduced to less than 1 mm, as long as the non-adhesive surface 321 of the extension 32 does not contact the gingiva of the orthodontic patient when the long-arm attachment 2 is bonded.
[0041] Further preferably, continue to refer to Figure 4 As shown, the distance C between the edge of the bonding surface 311 near the gingival margin and the corresponding gum line 31 can be 1 to 1.5 mm. Specifically, the edge of the bonding surface 311 at the bottom of the tooth maintains a certain distance from the corresponding gum line 31, so that the bonding surface 311 is located 1 to 1.5 mm above the corresponding gum line. This ensures that the portion of the long-arm attachment 2 bonded to the tooth does not affect the gums, preventing discomfort to the orthodontic patient's gums, while also ensuring the bonding and fixing effectiveness of the long-arm attachment 2.
[0042] The first surface 312 and the second surface 322 are the surfaces of the long-arm attachment 2 facing the shell body 1. During the placement of the shell body 1, the long-arm attachment 2 will pass through the first surface 312 and the second surface 322 in sequence. During the dislocation of the shell body 1, the long-arm attachment 2 will separate from the second surface 322 and the first surface 312 in sequence. The shapes of the first surface 312 and the second surface 322 affect the placement and dislocation of the shell body 1, and also affect the retention force between the shell body 1 and the teeth after it is in place. In actual situations, the first surface 312 can be partially or entirely configured as a curved surface or an inclined surface, or the second surface 322 can be partially or entirely configured as a curved surface or an inclined surface, or at least a portion of the first surface 312 and at least a portion of the second surface 322 can be configured as curved surfaces or inclined surfaces at the same time. Configuring the contact surfaces as curved surfaces or inclined surfaces can facilitate the removal and insertion of the shell body 1 and ensure that the shell body 1 forms a suitable retention force with the teeth after it is in place.
[0043] In addition, the edges of the first surface 312 and the second surface 322 can be configured in an arc shape to facilitate the placement and removal of the shell body 1 and to facilitate the shell body 1 to wrap the edges of the long arm attachment 2 without gaps.
[0044] In order to improve the expression of the correction force exerted by the attachment cavity on the long arm attachment 2, refer to Figure 5 As shown, the gingival end of the tooth receiving cavity extends toward the gingival side to form an extension portion 12. The attachment cavity includes a tooth attachment cavity 111 disposed in the tooth receiving cavity and used to enclose the adhesive portion 31, and a gingival attachment cavity 112 disposed in the extension portion 12 and used to enclose the extension portion 32. The tooth attachment cavity 111 and the gingival attachment cavity 112 are interconnected. The extension portion 12 extends toward the gingival side from at least the gingival end of the tooth receiving cavity corresponding to the long-arm attachment 2 and the adjacent tooth receiving cavities on both sides. This arrangement improves the integrity of the attachment cavity and the shell-shaped body 1, thereby increasing the support provided by the attachment cavity when applying force to the long-arm attachment 2, thereby enhancing the expression of the orthodontic force.
[0045] refer to Figure 1 As shown, when through-hole structure 33 is provided on bonding portion 31, the inner surface of shell-like body 1 is provided with groove 13 for accommodating guide wire 3, corresponding to the guiding direction of guide wire 3, which is also the direction of tooth movement. Groove 13 provides a certain restraining effect on guide wire 3, but does not affect the relative movement between the accessory cavity and guide wire 3 along the guiding direction when the accessory cavity applies corrective force to the long-arm accessory 2. In other words, there is a clearance fit between groove 13 and guide wire 3.
[0046] In addition, in order to ensure that the long-arm attachment 2 can slide along the guide wire 3, there is also a clearance fit between the through-hole structure 33 and the guide wire 3, and the clearance fit here has a constraint that allows the long-arm attachment 2 to slide along the guide wire 3 in the guide direction. Clearance fit means that the tolerance band within the through-hole structure 33 is above the tolerance band of the guide wire 3, that is, the actual size of the through-hole structure 33 is always greater than or equal to the actual size of the guide wire 3. Preferably, the actual size of the through-hole structure 33 is slightly larger than the actual size of the guide wire 3. In other words, the cross-sectional area of the through-hole structure 33 is slightly larger than the cross-sectional area of the guide wire 3. Preferably, the gap between the through-hole structure 33 and the guide wire 3 is between 0.01 mm and 0.3 mm.
[0047] Furthermore, the guide wire 3 can be any of stainless steel archwire, cobalt-chromium-nickel alloy wire, beta-titanium alloy wire, and nickel-titanium alloy wire. It can be round or square. The round wire can have a thickness (in inches): 0.012, 0.014, 0.016, 0.018, or 0.020. The square wire can have a thickness (in inches): 0.016*0.016, 0.017*0.022, 0.017*0.025, 0.018*0.025, 0.019*0.025, or 0.0215*0.028.
[0048] Example 2:
[0049] refer to Figure 6 and Figure 7 As shown, the main difference between the second embodiment and the first embodiment is that the through hole structure 33 is provided on the extension portion 32. The other structural designs of the long arm attachment 2 and the design of the shell body 1 are the same as those in the first embodiment, and no further details are given here. In order to avoid the problem that the shell body 1 contacts the guide wire 3 and affects the tooth movement effect during wearing, the tooth movement effect is shown in FIG. Figure 8 As shown, Figure 8 This is a schematic cross-sectional view of the orthodontic system 100 of this embodiment, taken along the longitudinal section of the long arm attachment 2, when worn. The figure shows that the gum attachment cavity 112 only covers a portion of the extension 32, with the through-hole structure 33 disposed in the uncovered portion of the extension 32. For example, the gum attachment cavity 112 covers the 1 / 3 to 2 / 3 area of the extension 32 near the adhesive portion 31, with the through-hole structure 33 located on the mesiodistal side of the remaining area.
[0050] In a preferred embodiment, reference Figure 9As shown, the through-hole structure 33 is located at the free end of the extension portion 32, and the through-hole structure 33 is provided with an opening 331 toward the gum. The width of the opening 331 is greater than the maximum width of the guide wire 3, thereby ensuring that the guide wire 3 can pass through the opening 331 and enter the through-hole structure 33. The advantage of this design is that it is convenient for the clinician to complete the installation of the correction system 100 in the patient's mouth. The doctor can first complete the pasting of the long-arm attachment 2 on the patient's teeth, and then place the guide wire 3 through the opening 331 into the through-hole structure 33. Similarly, after the correction is completed, this embodiment also facilitates the doctor to complete the removal of the correction system 100 from the oral cavity.
[0051] In this embodiment, the guide wire 3 is located in the gum area, and both ends need to be fixed to keep the guide wire 3 in the guiding direction. Specifically, the orthodontic system 100 in this embodiment also includes a fixing portion 4 located at the free end of the guide wire 3 for fixing on the teeth, and the fixing portion 4 is located on other teeth of the dental jaw where the teeth are located in the tooth receiving cavity. In this case, the shell-like body 1 may be part of the teeth covering the dental jaw, and there are teeth on both sides of the shell-like body 1 that are not covered by the shell-like body 1, and the fixing portion 4 may be located on the labial and buccal sides of these teeth. In one embodiment, with reference to Figure 10 As shown, one end of the fixing portion 4 is connected to the guide wire 3, and the other end forms a hooking structure; the hooking structure can be hooked on other teeth in the dental jaw where the shell-like body 1 encloses the teeth. For example, the teeth enclosed in the tooth receiving cavity of the shell-like body 1 are the central incisor and the lateral incisor, and the hooking structure is hooked on any teeth on both sides of the central incisor and the lateral incisor. This structural design makes the installation and removal of the guide wire 3 convenient and easy for doctors to operate clinically. It is understandable that in another embodiment, with reference to Figure 11 As shown, the fixing portion 4 can also be a bracket attached to the tooth surface not enclosed by the shell-shaped body 1, with the guide wire 3 secured within the archwire slot of the bracket, and the guide wire 3 bent so that a portion thereof is positioned within the gingival region. In this case where the free end of the guide wire 3 is fixed to the tooth surface, to facilitate the installation of the guide wire 3 and the through-hole structure 33 during use, it is preferred that the through-hole structure 33 be located at the free end of the extension portion 32, and that the through-hole structure 33 be provided with an opening 331 facing the gingival direction, similar to the long-arm attachment 2.
[0052] In order to improve the correction effect and increase the number of teeth wrapped by the shell body 1, the shell body 1 needs to wrap all the teeth on the jaw. In this case, when the fixing part 4 is located on the tooth surface, refer to Figure 12As shown, the shell-like body 1 is provided with a relief structure 14 corresponding to the fixing portion 4 and the guide wire 3. When worn, the relief structure 14 does not contact either the guide wire 3 or the fixing portion 4. Specifically, the relief structure 14 is a cavity structure protruding from the shell-like body 1. The cavity structure is provided corresponding to the fixing portion 4 and a portion of the guide wire 3 within the tooth area. Preferably, to increase the wrapping area of the shell-like body 1 around the tooth, the fixing portion 4 is preferably a bracket bonded to the tooth surface.
[0053] Of course, the two free ends of the guide wire 3 can be fixed in the gingival area. In this embodiment, the correction system 100 also includes an anchoring portion for fixing in the gingival area, and the free end of the guide wire 3 is connected to the anchoring portion. The anchoring portion can be a commonly used anchoring nail in clinical practice, and the two ends of the guide wire 3 are wrapped around the anchoring nail to achieve a fixing effect.
[0054] 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 the present utility model. In order to save the length of the application text, they will not be repeated here.
[0055] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
[0056] Similarly, the above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A tooth movement correction system, characterized in that: It includes a shell-shaped body with multiple tooth receiving cavities, a long arm attachment and a guide wire, the long arm attachment includes a connected bonding part and an extension part, the bonding part includes a bonding surface and a first surface arranged opposite to each other, the extension part includes a non-bonding surface and a second surface arranged opposite to each other, when the bonding surface is bonded to the tooth, the non-bonding surface faces the gum and is set at a distance from the corresponding gum, the first surface and the second surface face the inner surface of the shell-shaped body, the mesiodistal side of the bonding part and / or the extension part is provided with a through hole structure for passing the guide wire, the shell-shaped body has an attachment cavity that wraps the bonding part and at least part of the extension part, when worn, the attachment cavity applies a correction force to the long arm attachment so that the tooth bonded with the long arm attachment moves along the guide direction of the guide wire.
2. The correction system according to claim 1, characterized in that The gingival end of the tooth receiving cavity extends toward the gingival side to form an extension portion, and the accessory cavity includes a tooth accessory cavity arranged in the tooth receiving cavity and used to wrap the bonding portion, and a gingival accessory cavity arranged in the extension portion and used to wrap the extension portion, and the tooth accessory cavity and the gingival accessory cavity are connected.
3. The correction system according to claim 1, characterized in that When the through-hole structure is located at the bonding portion, a groove for accommodating the guide wire is provided on the inner surface of the shell-shaped body.
4. The correction system according to claim 3, characterized in that There is a clearance fit between the groove and the guide wire.
5. The correction system according to claim 2, characterized in that: The gum attachment cavity wraps a portion of the extension, and the through-hole structure is provided on the portion of the extension that is not wrapped.
6. The correction system according to claim 5, characterized in that: The through hole structure is located at the free end of the extension portion, and the through hole structure is provided with an opening portion facing the gum direction.
7. The correction system according to claim 5, characterized in that: It also includes a fixing portion located at the free end of the guide wire for fixing on the tooth, and the fixing portion is located on other teeth in the dental jaw where the tooth is located in the tooth receiving cavity.
8. The correction system according to claim 7, characterized in that: One end of the fixing portion is connected to the guide wire, and the other end forms a hooking structure; the hooking structure can be hooked on other teeth in the dental jaw where the tooth is located in the tooth receiving cavity.
9. The correction system according to claim 5, characterized in that: It also includes a fixing part located at the free end of the guide wire for fixing on the teeth, and an avoidance structure is provided on the shell-like body corresponding to the fixing part and the guide wire. When worn, the avoidance structure does not contact the guide wire and the fixing part.
10. The correction system according to claim 7 or 9, characterized in that: The fixing part is a bracket bonded to the surface of the tooth, and the guide wire is fixed in the archwire slot of the bracket.
11. The correction system according to claim 5, characterized in that: It also includes an anchor portion for fixing in the gum area, and the free end of the guide wire is connected to the anchor portion.