Squeezing type transparent appliance

Abstract

The utility model relates to an extrusion type transparent appliance, which comprises at least one shell used for receiving a dental crown of a tooth to be corrected, and the shell comprises a wrapping part used for wrapping the tooth to be corrected; the contraction cavity part is arranged at one end of the wrapping part in the length direction of the teeth and contracts towards the middle in the width direction of the teeth, so that an extrusion cavity is formed between the contraction cavity part and the end part of the to-be-corrected teeth, and when the teeth are chewed, contraction pressing-in force is generated on the to-be-corrected teeth, and the to-be-corrected teeth are corrected to the corresponding positions. Compared with the prior art, only the shrinkage cavity part is adopted, and the volume of the shrinkage cavity part is smaller than that of the unwrapped tooth tip part of the to-be-corrected teeth, so that under the action of chewing, the shrinkage cavity part respectively generates vertically upward or downward shrinkage press-in force on the to-be-corrected teeth in the upper row or the lower row; and pressing and correcting the to-be-corrected tooth to a corresponding position.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an extrusion-type transparent orthodontic appliance. Background Art

[0002] Clear braces are currently the most commonly used appliance for correcting malocclusion. A three-dimensional digital dental and dentition model is obtained through oral scanning. The teeth are then divided into individual units. These units are then arranged to the target position for correction according to the orthodontic treatment plan. Multiple intermediate models are then created based on the amount of tooth movement. A series of clear braces are then fabricated from these models. The patient then wears the braces in sequence to achieve the desired correction effect.

[0003] Existing clear braces technology for tooth movement uses a split digital dentition model into individual digital tooth units, simulating tooth movement by moving these units. However, too little tooth movement results in insufficient appliance deformation, failing to generate sufficient corrective force to move the teeth. Excessive tooth movement, on the other hand, can lead to excessive deformation, preventing the appliance from fully seating and failing to move the teeth to their designed target positions.

[0004] like Figure 1 The figure shows an existing, commonly used unit-displacement appliance. This appliance deforms by creating a height difference between the tooth being pressed in and the adjacent teeth. The adjacent teeth then transfer retention attachments, relying on the adjacent teeth's support. The deformed appliance generates a pressing force, pushing the tooth in. Unit-displacement requires adjacent teeth for support, so individual teeth can only be pressed in sequentially; multiple teeth cannot be pressed in simultaneously. Summary of the Invention

[0005] The purpose of the present invention is to provide an extrusion-type transparent appliance in order to overcome the defect that the existing orthodontic appliance requires adjacent teeth as anchorage and cannot correct multiple teeth at the same time.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The technical solution of the present invention is to provide an extruded transparent appliance, which is at least one shell formed to receive the crown of a tooth to be corrected, wherein the shell comprises:

[0008] A wrapping portion, used for wrapping the tooth to be corrected;

[0009] The shrinkage cavity portion is arranged at one end of the wrapping portion along the length direction of the tooth, and shrinks toward the middle along the width direction of the tooth to form an extrusion cavity between the end portion of the tooth to be corrected, so that when chewing, a shrinkage pressing force is generated on the tooth to be corrected, and the tooth to be corrected is corrected to the corresponding position.

[0010] In some specific embodiments, the wrapping portion is used to wrap the crown of the tooth to be corrected to its incisal end.

[0011] In some specific embodiments, the wrapping portion wraps the crown of the tooth to be corrected to its cutting end along the curved surface of the crown of the tooth to be corrected.

[0012] In some specific embodiments, the wall thickness of the wrapping portion is 0.2-1.5 mm.

[0013] In some specific embodiments, the extrusion-type transparent appliance further includes an abutment portion for connecting the wrapping portion and the shrinkage cavity portion, and the abutment portion abuts against the incisal end of the crown of the tooth to be corrected.

[0014] In some specific embodiments, the abutment portion is the widest part of the incisal end of the crown of the tooth to be corrected.

[0015] In some specific embodiments, the wall thickness of the abutting portion is 0.2-1.5 mm.

[0016] In some specific embodiments, the shrinkage cavity portion shrinks from the abutment portion toward the middle along the width direction of the tooth, and forms an extrusion cavity with the crown end of the tooth to be corrected.

[0017] In some specific embodiments, the volume of the shrunken cavity portion is shrunk by 0.25%-0.5% compared to the volume of the tooth to be corrected that is not wrapped by the wrapping portion.

[0018] In some specific embodiments, the wall thickness of the contraction cavity portion is 0.2-1.5 mm.

[0019] In some specific embodiments, the extrusion cavity height of the contraction cavity portion is 0.8-1.2 mm.

[0020] In some specific embodiments, the shell is a TPU thermoplastic polyurethane shell or a PETG copolyester plastic shell.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The extrusion-type transparent appliance of the present invention cleverly avoids the additional conditions of traditional appliances such as borrowing adjacent teeth for support and bonding attachments through the design of local contraction. It only shrinks the cavity part and does not fit the teeth to be corrected, that is, the volume of the shrinkage cavity part is smaller than the volume of the unwrapped tooth tip part of the teeth to be corrected. Under the action of chewing, the shrinkage cavity part generates a vertical upward or downward contraction pressure on the upper or lower row of teeth to be corrected, respectively, and presses the teeth to be corrected to the corresponding position.

[0023] (2) The extrusion-type transparent appliance of the present invention does not require support from adjacent teeth and can achieve press-in correction of a single tooth or simultaneous press-in correction of multiple teeth, greatly improving the effect of tooth correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the present invention.

[0027] The following are marked in the figure:

[0028] 1 is the shell, 2 is the wrapping part, 3 is the shrinkage cavity part, and 4 is the abutment part DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0031] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0032] In the following embodiments, unless otherwise specified, functional components or structures are conventional components or structures used in the art to achieve corresponding functions.

[0033] Example 1:

[0034] This embodiment provides an extruded transparent appliance in combination with a specific tooth profile, which is at least one shell 1 formed to receive a crown of a tooth to be corrected, wherein the shell 1 includes:

[0035] The wrapping portion 2 is used to wrap the tooth to be corrected;

[0036] The shrinkage cavity portion 3 is arranged at one end of the wrapping portion 2 along the length direction of the tooth, and shrinks toward the middle along the width direction of the tooth to form an extrusion cavity between the end portion of the tooth to be corrected, so that when chewing, a shrinkage pressing force is generated on the tooth to be corrected, and the tooth to be corrected is corrected to the corresponding position.

[0037] like Figure 1 As shown, this embodiment is an extrusion type transparent appliance used for correcting two opposing incisors, and the two extrusion type transparent appliances are independent entities.

[0038] The wrapping portion 2 is used to wrap around the crown of the incisor to be corrected, extending to its incisal tip. To achieve the desired correction, the wrapping portion 2 preferably follows the curved surface of the crown, conforming to and wrapping the crown to its incisal tip. Without interfering with adjacent teeth, the wall thickness of the wrapping portion 2 is 0.2-1.5 mm.

[0039] In order to further make the wrapping portion 2 fit the incisor to be corrected and to further exert the contraction pressing force of the shrinkage cavity portion 3, the extrusion type transparent appliance also includes an abutment portion 4 for connecting the wrapping portion 2 and the shrinkage cavity portion 3, and the abutment portion 4 abuts against the incisal end of the crown of the incisor to be corrected. Without affecting the adjacent teeth, the wall thickness of the abutment portion 4 is 0.2-1.5mm. When the shell 1 is worn on the incisor to be corrected, the abutment portion 4 is located at the widest part of the incisor crown that fits the incisor to be corrected as the starting position, so that the correction situation can be better monitored, such as the height of the extrusion cavity into which the shrinkage cavity portion 3 is pressed.

[0040] The shrinkage cavity portion 3 shrinks from the abutment portion 4 toward the middle along the width of the tooth, and forms an extrusion cavity with the crown end of the tooth to be corrected. Depending on the correction period, the volume of the shrinkage cavity portion 3 shrinks by 0.25%-0.5% compared to the volume of the tooth to be corrected that is not wrapped by the wrapping portion 1. Without affecting the adjacent teeth, the wall thickness of the shrinkage cavity portion 3 is 0.2-1.5mm, and the extrusion cavity height of the shrinkage cavity portion 3 is 0.8-1.2mm. Preferably, the extrusion cavity height of the shrinkage cavity portion 3 is 1mm.

[0041] The shell 1 is a TPU thermoplastic polyurethane shell or a PETG copolyester plastic shell, which has the advantages of good transparency, thermoplasticity, wear resistance, flexibility and the like.

[0042] During correction, since the extrusion type transparent appliance is designed with a contraction cavity 3 that does not match the incisor to be corrected, the incisor interacts with the contraction cavity 3 of the extrusion type transparent appliance when chewing, generating a contraction pressure in the corresponding direction. For example, the extrusion type transparent appliance located on the upper incisor gives the upper incisor a vertical upward contraction pressure, and the extrusion type transparent appliance located on the lower incisor gives the upper incisor a vertical downward contraction pressure. Figure 1In each stage of correction, the upper incisors are moved upward to the corresponding position, and the lower incisors are moved downward to the corresponding position. After multiple stages of correction are completed, both the upper and lower incisors can be moved to the preset reasonable positions to complete the correction.

[0043] Example 2:

[0044] This embodiment provides an extruded transparent appliance in combination with a specific tooth profile, which is at least one shell 1 formed to receive a crown of a tooth to be corrected, wherein the shell 1 includes:

[0045] The wrapping portion 2 is used to wrap the tooth to be corrected;

[0046] The shrinkage cavity portion 3 is arranged at one end of the wrapping portion 2 along the length direction of the tooth, and shrinks toward the middle along the width direction of the tooth to form an extrusion cavity between the end portion of the tooth to be corrected, so that when chewing, a shrinkage pressing force is generated on the tooth to be corrected, and the tooth to be corrected is corrected to the corresponding position.

[0047] like Figure 2 As shown, this embodiment is an extrusion-type transparent appliance for correcting four side-by-side molars. The four extrusion-type transparent appliances are independent individuals and constitute an appliance combination.

[0048] The wrapping portion 2 is used to wrap around the crown of the molar to be corrected, extending to its incisal end. To achieve the desired treatment, the wrapping portion 2 preferably follows the curved surface of the molar crown, conforming to and wrapping the crown to its incisal end. The thickness of the wrapping portion 2 is preferably 0.2-1.5 mm, without affecting adjacent teeth.

[0049] In order to further make the wrapping portion 2 fit the molar to be corrected and to further exert the contraction pressing force of the shrinkage cavity portion 3, the extrusion type transparent appliance also includes an abutment portion 4 for connecting the wrapping portion 2 and the shrinkage cavity portion 3, and the abutment portion 4 abuts against the incisal end of the crown of the molar to be corrected. Without affecting the adjacent teeth, the wall thickness of the abutment portion 4 is 0.2-1.5mm. When the shell 1 is worn on the molar to be corrected, the abutment portion 4 is located at the widest part of the incisal end of the crown of the molar to be corrected as the starting position, so that the correction situation can be better monitored, such as the height of the extrusion cavity into which the shrinkage cavity portion 3 is pressed.

[0050] The shrinkage cavity portion 3 shrinks from the abutment portion 4 toward the middle along the width of the tooth, and forms an extrusion cavity with the crown end of the molar to be corrected. Depending on the correction period, the volume of the shrinkage cavity portion 3 shrinks by 0.25%-0.5% compared to the volume of the tooth to be corrected that is not wrapped by the wrapping portion 1. Without affecting the adjacent teeth, the wall thickness of the shrinkage cavity portion 3 is 0.2-1.5mm, and the extrusion cavity height of the shrinkage cavity portion 3 is 0.8-1.2mm. Preferably, the extrusion cavity height of the shrinkage cavity portion 3 is 1mm.

[0051] The shell 1 is a TPU thermoplastic polyurethane shell or a PETG copolyester plastic shell, which has the advantages of good transparency, thermoplasticity, wear resistance, flexibility and the like.

[0052] During correction, since the extrusion type transparent appliance is designed with a contraction cavity portion 3 that does not coincide with the molar to be corrected, the molar interacts with the contraction cavity portion 3 of the extrusion type transparent appliance when chewing, generating a contraction pressure in the corresponding direction. For example, each extrusion type transparent appliance located on the upper molar gives the upper molar a vertical upward contraction pressure, and adjacent extrusion type transparent appliances do not interfere with each other. Figure 2 In each stage of correction, the upper molars move upward to the corresponding position. After multiple stages of correction are completed, the upper molars can be moved to the preset reasonable position to complete the correction.

[0053] Example 3:

[0054] This embodiment provides an extruded transparent appliance in combination with a specific tooth profile, which is at least one shell 1 formed to receive a crown of a tooth to be corrected, wherein the shell 1 includes:

[0055] The wrapping portion 2 is used to wrap the tooth to be corrected;

[0056] The shrinkage cavity portion 3 is arranged at one end of the wrapping portion 2 along the length direction of the tooth, and shrinks toward the middle along the width direction of the tooth to form an extrusion cavity between the end portion of the tooth to be corrected, so that when chewing, a shrinkage pressing force is generated on the tooth to be corrected, and the tooth to be corrected is corrected to the corresponding position.

[0057] like Figure 3 As shown, this embodiment is an extrusion-type transparent appliance for correcting multiple types of teeth, such as incisors, premolars, and molars. Each extrusion-type transparent appliance in each upper and lower row is an independent individual, forming an appliance combination.

[0058] The wrapping portion 2 is used to wrap around the crown of the tooth to be corrected, extending to its incisal end. To achieve the desired correction, the wrapping portion 2 preferably conforms to the curved surface of the crown, wrapping around the crown to its incisal end. Without interfering with adjacent teeth, the wall thickness of the wrapping portion 2 is 0.2-1.5 mm.

[0059] In order to further make the wrapping part 2 fit the teeth to be corrected and to further exert the contraction pressing force of the shrinkage cavity part 3, the extrusion type transparent aligner also includes an abutment part 4 for connecting the wrapping part 2 and the shrinkage cavity part 3, and the abutment part 4 abuts against the crown cutting end of the teeth to be corrected. Without affecting the adjacent teeth, the wall thickness of the abutment part 4 is 0.2-1.5mm. When the shell 1 is worn on the teeth to be corrected, the abutment part 4 is located at the widest part of the crown cutting end of the teeth to be corrected as the starting position, so that the correction situation can be better monitored, such as the height of the extrusion cavity into which the shrinkage cavity part 3 is pressed.

[0060] The shrinkage cavity portion 3 shrinks from the abutment portion 4 toward the middle along the width of the tooth, and forms an extrusion cavity with the crown end of the tooth to be corrected. Depending on the correction period, the volume of the shrinkage cavity portion 3 shrinks by 0.25%-0.5% compared to the volume of the tooth to be corrected that is not wrapped by the wrapping portion 1. Without affecting the adjacent teeth, the wall thickness of the shrinkage cavity portion 3 is 0.2-1.5mm, and the extrusion cavity height of the shrinkage cavity portion 3 is 0.8-1.2mm. Preferably, the extrusion cavity height of the shrinkage cavity portion 3 is 1mm.

[0061] The shell 1 is a TPU thermoplastic polyurethane shell or a PETG copolyester plastic shell, which has the advantages of good transparency, thermoplasticity, wear resistance, flexibility and the like.

[0062] During correction, since the extrusion type transparent appliance is designed with the contraction cavity part 3 which is not matched with the incisor to be corrected, the premolar to be corrected and the molar to be corrected respectively, the teeth to be corrected interact with the contraction cavity part 3 of the extrusion type transparent appliance when chewing, generating a contraction pressing force in the corresponding direction. For example, each extrusion type transparent appliance of the tooth to be corrected at the top gives a vertical upward contraction pressing force to the tooth to be corrected at the top, and each extrusion type transparent appliance of the tooth to be corrected at the bottom gives a vertical downward contraction pressing force to the tooth to be corrected at the bottom. Adjacent and opposite extrusion type transparent appliances do not interfere with each other. Figure 3 In each correction stage, the upper teeth to be corrected are moved upward to the corresponding position, and the lower teeth to be corrected are moved downward to the corresponding position. After multiple correction stages are completed, both the upper and lower teeth to be corrected can be moved to the preset reasonable positions to complete the correction.

[0063] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A squeeze-type transparent appliance, characterized in that: A shell (1) is formed for receiving a crown of a tooth to be corrected, wherein the shell (1) comprises: A wrapping portion (2) for wrapping the tooth to be corrected; The shrinkage cavity portion (3) is provided at one end of the wrapping portion (2) along the length direction of the tooth and shrinks toward the middle along the width direction of the tooth to form an extrusion cavity between the end portion of the tooth to be corrected, so that when chewing, a shrinkage pressing force is generated on the tooth to be corrected, and the tooth to be corrected is corrected to a corresponding position.

2. The extrusion type transparent appliance according to claim 1, characterized in that: The wrapping portion (2) is used to wrap the crown of the tooth to be corrected to its cutting end.

3. The extrusion type transparent appliance according to claim 1, characterized in that: The wrapping portion (2) wraps the crown of the tooth to be corrected to its cutting end along the arc surface of the crown of the tooth to be corrected.

4. The extrusion type transparent appliance according to claim 1, characterized in that: The extrusion-type transparent appliance further comprises an abutment portion (4) for connecting the wrapping portion (2) and the shrinkage cavity portion (3), and the abutment portion (4) abuts against the incisal end of the crown of the tooth to be corrected.

5. The extrusion type transparent appliance according to claim 4, characterized in that: The abutment portion (4) is the widest part of the crown cutting end portion of the tooth to be corrected.

6. The extrusion type transparent appliance according to claim 4, characterized in that: The shrinkage cavity portion (3) shrinks from the abutment portion (4) toward the middle along the width direction of the tooth, and forms an extrusion cavity with the crown end of the tooth to be corrected.

7. The extrusion type transparent appliance according to claim 6, characterized in that: The volume of the shrinkage cavity portion (3) shrinks by 0.25%-0.5% compared to the volume of the tooth to be corrected that is not wrapped by the wrapping portion (2).

8. The extrusion type transparent appliance according to claim 4, characterized in that: The extrusion cavity height of the contraction cavity portion (3) is 0.8-1.2 mm.

9. The extrusion type transparent appliance according to claim 4, characterized in that: The wall thickness of the wrapping portion (2) is 0.2-1.5 mm; The wall thickness of the abutment portion (4) is 0.2-1.5 mm; The wall thickness of the shrinkage cavity (3) is 0.2-1.5 mm.

10. The extrusion type transparent appliance according to claim 1, characterized in that: The shell (1) is a TPU thermoplastic polyurethane shell or a PETG copolyester plastic shell.

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