Invisible appliance with locally enhanced branch resistance

Abstract

The utility model discloses an invisible appliance with locally enhanced branch resistance, the appliance is an integrated structure formed by 3D printing, the appliance comprises a side wall part used for supporting the inner side and the outer side of a tooth, an occlusion part used for supporting the occlusion surface of the tooth and a rear supporting part used for supporting the rear side of a molar, and a tooth socket is formed among the side wall part, the occlusion part and the rear supporting part. The thickness of the side wall part is gradually reduced from the two ends to the middle, the thickness of the rear supporting part and the thickness of the ends of the side wall part are 0.8-1 mm, the thickness of the middle of the side wall part is 0.5-0.7 mm, and the thickness of the meshing part is 0.4-0.6 mm. The utility model provides an appliance, which adopts an unequal-thickness design, improves the resistance to molar branches, prevents the molar from moving forward and leaning forward, and gives consideration to the wearing comfort at the same time.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic appliance technology, and in particular to an invisible orthodontic appliance with localized enhanced anchorage. Background Technology

[0002] When correcting crowded teeth, it is necessary to extract the premolars on both sides to create space for the subsequent teeth to rearrange. After wearing braces, the braces pull the front teeth backward, and eventually the space disappears, and the teeth are aligned into an ideal arch shape.

[0003] Existing orthodontic appliances, similar to the patent application number CN201611142001.5, generally utilize a membrane of a certain thickness for molding to obtain the appliance. The thickness of the appliance is basically consistent in different positions, and the thickness of the appliance in the anterior teeth and molar areas is basically consistent. If a thinner membrane is used to mold the appliance, the thickness of the appliance in the molar area is smaller, and the appliance's resistance to the molars is weak. When the user wears the appliance for correction, the molars are prone to tilting and moving forward, affecting the correction effect. If a thicker membrane is used to mold the appliance, the overall thickness of the appliance is large. Although the appliance's resistance to the molars is improved, and the molars are less likely to migrate and move forward, it increases the consumption of materials, and the thickness of the occlusal surface is also large, affecting the wearing comfort. Utility Model Content

[0004] In order to overcome the above-mentioned defects of existing orthodontic appliances, this utility model proposes an orthodontic appliance with an unequal thickness design, which improves the resistance to molars, prevents molars from moving forward and tilting forward, and at the same time takes into account the wearing comfort.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anchorage-enhanced invisible orthodontic appliance is a 3D-printed one-piece structure. The appliance includes a lateral support for supporting the inner and outer sides of the teeth, an occlusal support for supporting the occlusal surfaces of the teeth, and a posterior support for supporting the posterior surfaces of the molars. An alveolar groove is formed between the lateral support, the occlusal support, and the posterior support. The thickness of the lateral support gradually decreases from both ends to the middle. The thickness of the posterior support and the end thickness of the lateral support are 0.8-1 mm, the thickness of the middle part of the lateral support is 0.5-0.7 mm, and the thickness of the occlusal support is 0.4-0.6 mm.

[0007] With the above settings, firstly, the appliance adopts an unequal thickness design, with thicker thickness at the ends of the lateral rim and the rear support portion, which enhances the appliance's resistance to the molars and prevents the molars from tilting or shifting forward during correction; secondly, the middle part of the lateral rim and the occlusal portion are thinner, which reduces material consumption while improving comfort.

[0008] Furthermore, the orthodontic appliance also includes a front support portion located at both ends of the alveolar bone. The front support portion is used to support the anterior side of the molars, and the thickness of the front support portion is 0.9-1.1 mm.

[0009] The above settings further prevent molars from tilting or shifting forward.

[0010] Furthermore, the distance between the two ends of the tooth groove centerline is L. When L < 35 mm, the thickness of the rear support and the end of the side wall are 0.8-0.9 mm, and the thickness of the biting part is 0.4-0.5 mm.

[0011] With the above settings, the thickness of the orthodontic appliance can be further optimized according to the wearer's age, thereby further improving comfort.

[0012] Furthermore, when L>=35mm, the thickness of the rear support and the end of the side panel are 0.9-1mm, and the thickness of the interlocking part is 0.5-0.6mm.

[0013] Furthermore, the orthodontic appliance is made of transparent resin. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the orthodontic appliance used in an embodiment.

[0015] Figure 2 This is a top view of the orthodontic appliance used in an embodiment.

[0016] Figure 3 This is a schematic diagram of the orthodontic appliance used in an embodiment for correcting teeth.

[0017] Figure 4 for Figure 3 AA sectional view.

[0018] Figure 5 This is a schematic diagram of the front support portion supporting the molar in an embodiment. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] First molar reduction orthodontic treatment, which involves extracting the first molar and wearing an orthodontic appliance, is currently a widely used treatment method. During treatment, insufficient molar anchorage often leads to molar displacement and tilting. To reduce molar displacement and tilting during treatment, scholars both domestically and internationally have conducted extensive research. For example, Tang compared second molar reduction and first molar reduction treatment methods, finding that the molar displacement was less in the first molar reduction method than in the second molar reduction method. Another example is the study showing that reducing the step distance of the appliance design teeth to 0.15mm helps reduce molar tilting. Furthermore, some studies suggest that increasing the wearing time of each appliance helps improve molar stability. Additionally, anchorage devices such as anchorage screws can be added to increase anchorage, but this method requires local anesthesia for surgical installation, carries significant safety risks, and has low comfort levels.

[0021] The aforementioned studies have primarily focused on optimizing treatment plans, without addressing the research and optimization of orthodontic appliances to improve molar anchorage and reduce molar tilting and forward movement.

[0022] In this application, such as Figures 1 to 4 As shown, an anchorage-enhanced invisible orthodontic appliance is proposed. The appliance is a one-piece structure 3D printed. The appliance includes a lateral support 2 for supporting the inner and outer sides of the teeth, an occlusal support 3 for supporting the occlusal surface of the teeth, and a posterior support 4 for supporting the posterior side of the molars. An alveolar groove is formed between the lateral support 2, the occlusal support 3 and the posterior support 4. The thickness of the lateral support 2 gradually decreases from both ends to the middle. The thickness t1 of the posterior support 4 and the thickness t2 of the ends of the lateral support 2 are 0.8-1 mm. The thickness t3 of the middle part of the lateral support 2 is 0.5-0.7 mm. The thickness t5 of the occlusal support 3 is 0.4-0.6 mm.

[0023] With the above settings, firstly, the appliance adopts an unequal thickness design, with the end of the side wall 2 and the rear support 4 being thicker, which enhances the appliance's resistance to the molars and prevents the molars from tilting and moving forward during correction; secondly, the middle of the side wall 2 and the occlusal part 3 are thinner, which reduces material consumption while improving comfort.

[0024] This application uses the lower row of teeth as an example for explanation. The teeth include the front teeth and multiple molars located on the left and right sides of the front teeth. In the first molar reduction treatment plan, the first molars on the left and right sides are extracted to create empty spaces on the left and right sides of the front teeth, making room for the subsequent rearrangement of the front teeth. During the correction, the front teeth need to be moved backward slowly without the molars moving. Therefore, the orthodontic appliance needs to have a large resistance to the molars, while the resistance to the front teeth is relatively less required.

[0025] After the user puts on the braces, the teeth move into the alveolar bone. The lateral portion 2 supports the inner and outer sides of the teeth, and the occlusal portion 3 supports the occlusal surface of the teeth. Specifically, as shown... Figure 3 and Figure 4 As shown, the posterior support 4 supports the posterior side of the molar, and the ends of the lateral support 2 support the inner and outer sides of the molar. The thickness of the posterior support 4 and the lateral support 2 is greater than that of traditional orthodontic appliances, specifically 0.9 mm, which improves the resistance of the appliance to the molar and prevents the molar from tilting or moving forward. The thickness of the lateral support 2 gradually decreases from both ends to the middle. That is, the thickness of the lateral support 2 on the inner and outer sides of the front teeth 200 is less than the thickness of the lateral support 2 on the inner and outer sides of the molars 300, and is also less than the thickness of traditional orthodontic appliances, saving materials and improving lip comfort. The lateral support 2 applies a posterior force to the front teeth, causing the front teeth to move backward and gradually reducing the space at both ends of the front teeth. The occlusal part 3 is thinner than that of traditional orthodontic appliances, specifically 0.5 mm, which enhances the comfort of teeth during occlusion. The orthodontic appliance of this application is made by 3D printing, which allows for targeted thickening of specific areas of the appliance according to needs, and the thickness is more precisely and controllable.

[0026] As one implementation method, the orthodontic appliance also includes a front support portion 5 disposed at both ends of the alveolar bone. The front support portion 5 is used to support the anterior side of the molars, and the thickness t4 of the front support portion 5 is 0.9-1.1 mm.

[0027] The above settings further prevent molars from tilting or shifting forward.

[0028] After the teeth in this application are fitted with orthodontic appliances, the anterior support portion 5 supports the anterior side of the molars, such as... Figure 3 and Figure 5 As shown, to further prevent the molars from tilting and shifting forward during orthodontic treatment, the thickness of the anterior support 5 is specifically 1 mm.

[0029] As one implementation method, the distance between the two ends of the tooth groove centerline is L. When L < 35mm, the thickness of the rear support part 4 and the thickness of the end of the side wall part 2 are 0.8-0.9mm, and the thickness of the biting part 3 is 0.4-0.5mm.

[0030] With the above settings, the thickness of the orthodontic appliance can be further optimized according to the wearer's age, thereby further improving comfort.

[0031] The distance between the two ends of the alveolar centerline in this application corresponds to the width of the user's dental arch, such as... Figure 2 As shown, the width of the dental arch gradually increases with age in adolescents, stabilizing after adulthood. Studies have shown that the average width of the dental arch increases from 32.7 mm to 35.3 mm between the ages of seven and fifteen. This application uses a dental arch width of 35 mm as the boundary; that is, for orthodontic appliances with L < 35 mm, it is assumed that the appliance is intended for minors, whose front teeth are relatively easy to move, and the appliance has relatively low requirements for the anchorage force of the molars. The thickness of the posterior support portion 4 and the end portion 2 is specifically taken as 0.85 mm. The occlusal force of minors is relatively weak, and the thickness of the occlusal portion 3 is specifically taken as 0.45 mm.

[0032] As one implementation method, when L>=35mm, the thickness of the rear support part 4 and the thickness of the end of the side wall part 2 are 0.9-1mm, and the thickness of the interlocking part 3 is 0.5-0.6mm.

[0033] When L>=35mm, it is assumed that the orthodontic appliance is for adults, whose front teeth are relatively difficult to move. The appliance requires higher resistance to the molars. The thickness of the end of the posterior support part 4 and the lateral part 2 is specifically taken as 0.95mm. The occlusal force of minors is relatively strong, so the thickness of the occlusal part 3 is specifically taken as 0.55mm.

[0034] As one implementation method, the orthodontic appliance is made of transparent resin.

[0035] The orthodontic appliance in this application is made of dental transparent resin produced by LuxCreo, which gives the appliance good transparency, elasticity and comfort.

[0036] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A clear aligner with resistance to local reinforcement, characterized in that, The appliance is a one-piece structure for 3D printing, comprising a side wall part for supporting the inner and outer sides of the teeth, a bite part for supporting the bite surface of the teeth, and a rear support part for supporting the rear side of the molars, a tooth groove being formed between the side wall part, the bite part and the rear support part, the thickness of the side wall part gradually decreases from both ends to the middle part, the thickness of the rear support part and the end part of the side wall part is 0.8-1mm, the thickness of the middle part of the side wall part is 0.5-0.7mm, and the thickness of the bite part is 0.4-0.6mm.

2. The locally reinforced, removable orthodontic appliance of claim 1, wherein, The appliance further comprises a front support part arranged at both ends of the tooth groove, the front support part being used for supporting the front side of the molars, and the thickness of the front support part is 0.9-1.1mm.

3. The locally reinforced, removable orthodontic appliance of claim 1, wherein, When the distance between both ends of the center line of the tooth groove is L, and L<35mm, the thickness of the rear support part and the end part of the side wall part is 0.8-0.9mm, and the thickness of the bite part is 0.4-0.5mm.

4. The locally reinforced, removable orthodontic appliance of claim 3, wherein, When L>=35mm, the thickness of the rear support part and the end part of the side wall part is 0.9-1mm, and the thickness of the bite part is 0.5-0.6mm.

5. The locally reinforced, self-aligning, removable orthodontic appliance of Claim 1, wherein, The material of the appliance is transparent resin.

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