Bracket-free invisible appliance with multi-curve structure

Abstract

The invention provides a bracket-free invisible orthodontic appliance with a multi-curve structure, and belongs to the field of invisible orthodontic appliances in an orthodontic technology. The orthodontic appliance comprises a shell-shaped orthodontic appliance body which is attached to and covers the surface of teeth, and a multi-curved part which is formed on the surface of the orthodontic appliance body. The multi-curve part comprises a plurality of continuous or independent U-shaped curves, arc-shaped curves, T-shaped curves and the like, and is distributed on the cheek-tongue side, the jaw surface corresponding appliance part, the appliance extension part or the edge line area of teeth. According to the orthodontic appliance, the local elasticity and rigidity of the orthodontic appliance can be adjusted through the multi-curve structure, so that the mechanical property of the orthodontic appliance is optimized, the orthodontic appliance generates more suitable orthodontic force or retention force on teeth, meanwhile, a larger deformation range is obtained, the tolerance range of in-place teeth is increased, and finally the curative effect of invisible orthodontic treatment is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of oral orthodontics, and in particular to a bracketless invisible braces, and specifically to an invisible braces capable of optimizing elasticity and rigidity. Background Art

[0002] Among dental diseases, malocclusion such as uneven teeth, buck teeth, and underbite are relatively common. The prevalence of these diseases is as high as over 70%, which endangers the patient's maxillofacial function and aesthetics, and even digestive function and mental health. Orthodontists correct malocclusion by applying force through braces. In the past, fixed braces were mostly used to correct teeth. Fixed braces move teeth through the correction force generated by the deformation of elastic arch wires or stabilize the dental arch shape through the hardness of rigid arch wires. Orthodontists adjust the force on teeth by selecting arch wires of different sizes (such as 0.012-inch round wires, 0.017*25-inch square wires, etc.), arch wires of different properties (such as nickel-titanium arch wires, stainless steel arch wires, β-titanium arch wires, etc.), and bending different shapes of curves (such as teardrop curves, T-shaped curves, and omega curves).

[0003] In recent years, bracketless invisible braces have been widely used clinically due to their advantages such as beauty, comfort, and convenience in oral hygiene maintenance. Bracketless invisible braces move teeth through the force generated by the deformation of the brace diaphragm. The mechanical properties of braces directly affect the expression rate of tooth movement. If the rigidity is too large, the braces are not easy to deform into place and are prone to fall off, or the force is too large after they are in place, which is harmful to the periodontal health of the teeth; if the elasticity is too large, the force is too small and decays too quickly after the braces are in place, and the teeth cannot be effectively corrected. How to balance elasticity and rigidity is a problem that invisible braces need to overcome. As for the ideal bracketless invisible braces, appropriate elasticity is required to enter the concave part of the teeth and accessories to obtain retention. For the teeth to be moved, it is necessary to release a continuous and stable light force, and for the supporting teeth that do not need to be moved, rigidity is required to maintain.

[0004] Patent document 1 relates to a dental orthodontic appliance with a convex ridge, which includes an appliance body and a convex ridge connected to the appliance body. The moment of inertia is increased by providing a convex ridge protruding in a direction away from the cavity on the appliance body, thereby increasing the local stiffness of the orthodontic appliance.

[0005] Patent Document 2 relates to a composite suction integrated oral invisible orthodontic appliance and its manufacturing method. The invisible orthodontic appliance includes a rigid membrane and an elastic material layer. By setting a TPU material with high strength on the outside and a silicone rubber material with good elasticity on the inside, while ensuring the overall structural strength, it avoids generating excessive stress locally and improves the orthodontic effect and wearing comfort of the orthodontic appliance. Claim 5 of Patent Document 2 also discloses that the rigid membrane has a strengthening structure on the lingual side. The strengthening structure is provided at the lingual tooth body and the gingival margin, and the strengthening structure is a raised wrinkled structure. It strengthens the supporting force at the lingual position by setting the lingual strengthening structure, increases the ability to control and change the dental arch form, and at the same time forms an effective couple with the force of the labial orthodontic appliance, thereby better controlling the movement of teeth and increasing the orthodontic efficiency of teeth.

[0006] Patent Document 3 relates to an invisible orthodontic appliance and its preparation method. By forming micro-nano columns arranged in an array on the surface of a dental model to obtain a surface-functionalized dental model, and then using the surface-functionalized dental model as a mold to perform thermoforming on a polymer material membrane to obtain an invisible orthodontic appliance, the surface of the obtained invisible orthodontic appliance has a micro-nano column array structure, thereby providing hydrophobic properties, self-cleaning performance, and good antibacterial properties.

[0007] "Occlusion" in this article is a professional term in stomatology, and its English is "occlusion". "牙" and "合" are the left and right parts of a character, and this character cannot be found in the common font library, so it is written separately as "牙合". Prior art Patent Document 1: CN114305749A; Patent Document 2: CN116942338A; Patent Document 3: CN117532778A Summary of the invention

[0008] Problems to be solved by the invention According to the technology of Patent Document 1, it additionally sets a convex ridge as an attachment structure. The added convex ridge is strip-shaped and is used to increase the local moment of inertia of the orthodontic appliance, that is, the anti-bending ability, to prevent deformation or fracture when removing the orthodontic appliance. Patent Document 1 does not pay attention to the problem of how to adjust the orthodontic force exerted on teeth by the orthodontic appliance by changing the performance of the orthodontic appliance.

[0009] According to the technology of Patent Document 2, it seeks to balance elasticity and rigidity by setting two different materials on the outside and inside. This will undoubtedly increase the manufacturing cost and processing difficulty, and it also requires using a primer to bond and fix the rigid membrane and the elastic material layer, further making the manufacturing process cumbersome.

[0010] According to the technology of Patent Document 3, the antibacterial ability is improved by providing a micro-nano column array structure on the surface of the invisible braces, but no attention is paid to the problem of how to balance elasticity and rigidity.

[0011] In view of the shortcomings of existing bracketless invisible braces in mechanical properties, the present invention provides a bracketless invisible braces that optimizes mechanical properties through a local multi-curved structure. The braces can adjust elasticity and rigidity at the same time, so that the braces can produce a more suitable correction force or retention force while obtaining a larger deformation range, thereby increasing the tolerance range of tooth placement.

[0012] To achieve the above-mentioned purpose, one embodiment of the present invention provides a bracketless invisible braces with a multi-curved structure, comprising a shell-shaped braces body that fits and covers the tooth surface, and a multi-curved portion formed on the surface of the braces body.

[0013] In some embodiments, the shell-shaped appliance body and the multi-curved portion are integrally formed of the same material, or are a combination of materials with different properties.

[0014] In some embodiments, when the shell-shaped appliance body and the multi-curve portion are integrally formed of the same material, the multi-curve portion is in the shape of a convex ridge away from the tooth surface or in the shape of a concave valley toward the tooth surface.

[0015] In some embodiments, when the shell-shaped appliance body and the multi-curve portion are formed by combining materials with different properties, the multi-curve portion is convex ridge-shaped away from the tooth surface or concave valley-shaped toward the tooth surface, or is flush with the body portion.

[0016] In some embodiments, the multi-curve portion is a U-shaped curve, a T-shaped curve, a teardrop-shaped curve, an omega-shaped curve, a small circle-shaped curve, a boot-shaped curve, an arc-shaped curve, a zigzag curve, or a combination thereof.

[0017] In some embodiments, the cross-section of the multi-curved portion is rectangular, trapezoidal, arc-shaped, triangular, or polygonal.

[0018] In some embodiments, the multiple curved portions are continuous or discontinuous.

[0019] In some embodiments, the number of curves in the multi-curve section is at least 1.

[0020] In some embodiments, the multiple curved portions are distributed vertically, horizontally, or in a mixed manner in multiple directions.

[0021] In some embodiments, the multi-curved portion is located on the appliance at the buccal and lingual sides, the maxillofacial area, an extension area of ​​the appliance, or an edge line area.

[0022] In some embodiments, the multi-curved portion is arranged to correspond to at least one of a tooth surface, an adjacent tooth gap, or a cavitation area of ​​the tooth to be corrected.

[0023] In some embodiments, the multi-curved portion can be indirectly produced by a curved appendage, or directly generated by 3D printing.

[0024] Compared with the prior art, the beneficial effects of the present invention are: through the multiple curved parts, on the one hand, the total area of ​​the local bracketless invisible braces is increased; on the other hand, the local braces support structure is changed, similar to the principle of origami, thereby increasing the elasticity and ductility of the braces in the multiple curved extension direction, and in the vertical direction of the multiple curved part extension direction, the rigidity and stability can be increased, so that the braces can produce more suitable correction force or retention force.

[0025] In addition, in the embodiments of the present invention, the difference in local material properties can also be used to assist or replace the effect of adjusting the elasticity and rigidity of braces by local braces deformation. For the orthodontic areas corresponding to teeth that need to be stable, more rigid materials are used, and for the orthodontic areas corresponding to teeth that need to be moved, more elastic materials are used.

[0026] In addition, in the embodiments of the present invention, the multi-bend portion can also be applied to an invisible retainer. The retainer has the same mechanical performance requirements. If the rigidity is too large, it is not easy to wear and is easy to break. If the elasticity is too large, it is not easy to keep the position of the teeth. An ideal invisible retainer needs to have a certain elasticity when taking it off and wearing it, and has strong rigidity after it is in place. The present invention can make the retainer have good elasticity and rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of an invisible brace appliance with multiple curved parts and a corresponding dentition according to an embodiment of the present invention; Figure 2 For the present invention Figure 1 A specific example of the orientation of the multi-curved portion of the cross-sectional view of AA, wherein the tooth to be corrected is matched; Figure 3 For the present invention Figure 1 Another specific example of the orientation of the multi-curved portion of the cross-sectional view of AA, wherein the tooth to be corrected is matched; Figure 4 A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Figure 5 A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Figure 6 A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Figure 7A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Figure 8 A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Fig. 9 A three-dimensional diagram of an invisible brace appliance with multiple curved parts according to another specific example of the present invention; Fig.10 For the present invention Figure 1 A specific example of the cross-sectional shape of the multi-curved portion of the cross-sectional view of AA; Fig.11 A three-dimensional diagram of a multi-curved portion of a specific example of the present invention at the location of the orthodontic appliance; Fig.12 This is a three-dimensional diagram of an invisible braces appliance with multiple curved parts and a corresponding dental model according to a specific example of the present invention.

[0028] In the figure, number 10 is the multi-curved part; number 101 is the orthodontic appliance body; number 100 is the invisible orthodontic appliance with a multi-curved part; number 11 is the tooth gap area; number 12 is the interproximal area of ​​the teeth; number 13 is the adjacent teeth on both sides of the gap; number 200 is the corresponding dentition; number 30 is the multi-curved attachment; number 301 is the dental mold body; number 300 is the dental mold with a multi-curved attachment. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention. The present invention utilizes computer-aided design to provide a bracketless invisible orthodontic appliance that optimizes mechanical properties through local multi-curvature.

[0030] The multi-bend portion in this specification refers to a plurality of curved structural components, which are different from the convex ridge in Patent Document 1, the small cylindrical structure on the tongue side in Patent Document 2, and the micro-nano column array structure in Patent Document 3. The following is a detailed description with reference to the accompanying drawings.

[0031] Combination Figure 1 , which is a bracketless invisible brace appliance 100 with partial multiple bends 10 according to one embodiment of the present invention.

[0032] The bracketless invisible braces 100 comprises a shell-shaped braces body 101 which fits and covers the surface of the teeth, and a multi-curved portion 10 formed on the surface of the braces body. 200 is the dentition corresponding to the braces.

[0033] At the edentulous area 11 and the interproximal area 12 where the gap needs to be closed, the multi-curved portion presents a plurality of vertical (gingival-occlusal) continuous U-shaped curves, which increases the elasticity of the local orthodontic appliance during the gap closing process. At the adjacent tooth areas 13 on both sides of the gap, the multi-curved portion presents a plurality of horizontal (mesiodistal) continuous U-shaped curves, which increases the vertical elasticity, is beneficial to the vertical positioning and wrapping of the orthodontic appliance, and at the same time increases the mesiodistal rigidity, which is beneficial to the stability of the adjacent teeth in the mesiodistal direction during the gap closing process.

[0034] Combination Figure 2 The multi-curved portion 10 is in the shape of a convex ridge away from the tooth surface.

[0035] Combination Figure 3 The multi-curved portion 10 may also be in the shape of a valley facing the tooth surface. In this case, when the orthodontic appliance is worn, the multi-curved portion exerts an inward force on the teeth.

[0036] When the shell-shaped appliance body and the multi-curved portion are integrally formed of the same material, the multi-curved portion is in the shape of a convex ridge away from the tooth surface or in the shape of a concave valley toward the tooth surface.

[0037] When the shell-shaped appliance body and the multi-bend part are formed by combining materials with different properties, the multi-bend part is convex ridge away from the tooth surface or concave valley toward the tooth surface, or flush with the body. In this case, the elasticity or rigidity of the multi-bend part is different from that of the body.

[0038] Combination Figure 4 , which is another embodiment of the present invention, is a bracketless invisible orthodontic appliance 100 with local multiple curves 10. At the toothless gap portion 11 corresponding to the gap, the multiple curves are multiple independent vertical U-shaped curves, and at the adjacent teeth portion 13 on both sides of the gap corresponding to the gap, the multiple curves are multiple independent horizontal strip-shaped curves, and the two are transitioned at the interproximal portion 12.

[0039] Combination Figure 5 , which is another embodiment of the present invention, is a bracketless invisible orthodontic appliance 100 with local multiple curves 10. At the corresponding toothless gap area 11 and the adjacent gap area 12 between the teeth, the multiple curves are multiple U-shaped curves that are independent in the vertical direction and continuous in the horizontal direction. At the adjacent tooth areas 13 on both sides of the corresponding gap, the multiple curves are multiple independent arc-shaped curves, and the ends of the curves enter the undercut areas of the teeth, thereby improving the mechanical properties of the local orthodontic appliance and facilitating the placement, retention and removal of the orthodontic appliance at the undercut areas.

[0040] Combination Figure 6 , which is another embodiment of the present invention, is a bracketless invisible orthodontic appliance 100 with local multiple curves 10. In the areas corresponding to the missing teeth gap area 11 and the adjacent gap area 12 between the teeth, the multiple curves are multiple U-shaped curves that are independent in the vertical direction and continuous in the horizontal direction. In the adjacent teeth areas 13 on both sides of the corresponding gap, the multiple curves are multiple independent horizontal strip-shaped curves.

[0041] Figure 1 , 4 , 5 shows that the multiple curves are strip-shaped, U-shaped, and arc-shaped.

[0042] Combination Figure 7 , the multi-bend 10 can also be a T-shaped curve.

[0043] Combination Figure 8 , Multi-song 10 can also be an Omega-type song.

[0044] Combination Fig. 9 The multiple curves 10 may also be teardrop-shaped curves, small circle-shaped curves, boot-shaped curves, broken line-shaped curves or a combination thereof. The multiple curves shown in the figure are distributed in the interproximal areas of the teeth.

[0045] Combination Fig.10 The cross section of the multi-bend 10 is an arc, a trapezoid, a rectangle, a triangle, a polygon or a combination of different shapes.

[0046] Combination Figure 1 and 4 ~9, the multi-song section is a series of continuous songs or a series of disconnected independent songs.

[0047] Combination Figure 1 and 4 ~9, the number of songs in a multi-song section is at least 1, usually multiple.

[0048] Combination Figure 1 and 4 ~9, the multiple curved parts are distributed vertically, horizontally or in a mixed manner in multiple directions.

[0049] Combination Fig.11 The multi-curve part is located on the buccal and lingual side, maxillofacial side, extension area of ​​the appliance or the edge line area.

[0050] Combination Figure 1 and 4 ~9, the multi-curved portion is arranged corresponding to at least one of the tooth surface, the adjacent tooth gap or the cavitation area of ​​the tooth to be corrected.

[0051] Combination Fig.12 The invisible braces with multiple curved parts can be obtained by designing curved attachments 30 on the dental mold 301 to obtain a dental mold 300 with multiple curved attachments, and then indirectly produced by die pressing, or by designing a digital invisible braces model with multiple curved parts and then directly generating it by 3D printing.

[0052] The above figures take tooth extraction treatment cases as specific examples, but the invisible braces with multiple curved portions of the present invention can be used for both tooth extraction treatment cases and non-tooth extraction treatment cases.

[0053] The above is an explanation of the implementation method of the present invention. For those skilled in the art, any equivalent modification or substitution of the present invention is also within the scope of the present invention. Therefore, the equivalent transformation and modification made without departing from the spirit and scope of the present invention should be included in the present invention.

Claims

1. A bracketless invisible orthodontic appliance with a multi-curved structure, characterized in that: The invention comprises a shell-shaped orthodontic appliance body which is fitted and covered on the tooth surface, and a multi-curved part formed on the surface of the orthodontic appliance body.

2. The bracketless invisible brace appliance according to claim 1, characterized in that: The shell-shaped appliance body and the multi-curved part are integrally formed of the same material, or are formed by a combination of materials with different properties.

3. The bracketless invisible brace appliance according to claim 2, characterized in that: When the shell-shaped appliance body and the multi-curved portion are integrally formed of the same material, the multi-curved portion is in the shape of a convex ridge away from the tooth surface or in the shape of a concave valley toward the tooth surface.

4. The bracketless invisible brace appliance according to claim 2, characterized in that: When the shell-shaped appliance body and the multi-curved portion are formed by combining materials with different properties, the multi-curved portion is convex ridge-shaped away from the tooth surface or concave valley-shaped toward the tooth surface, or is flush with the body.

5. The bracketless invisible brace appliance according to claim 1, characterized in that: The multi-curved portion is a U-shaped curve, a T-shaped curve, a teardrop-shaped curve, an omega-shaped curve, a small circle-shaped curve, a boot-shaped curve, an arc-shaped curve, a broken line-shaped curve or a combination thereof.

6. The bracketless invisible brace appliance according to claim 1, characterized in that: The cross section of the multi-curved portion is rectangular, trapezoidal, arc-shaped, triangular or polygonal.

7. The bracketless invisible brace appliance according to claim 1, characterized in that: The multiple curved portions are continuous or discontinuous.

8. The bracketless invisible brace appliance according to claim 1, characterized in that: The multiple curved portions are distributed vertically, horizontally or in a mixed manner in multiple directions.

9. The bracketless invisible brace appliance according to claim 1, characterized in that: The multi-curved portion is located on the appliance at the buccal and lingual sides, the occlusal surface, the appliance extension portion or the edge line area.

10. The bracketless invisible brace appliance according to claim 1, characterized in that: The multi-curved portion is arranged corresponding to at least one of the tooth surface, the adjacent tooth gap or the cavitation area of ​​the tooth to be corrected; and / or Multi-curved parts are produced indirectly through curved attachments or directly through 3D printing.

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