3D printing U-shaped molar propelling device

Abstract

The utility model relates to a 3D printing U-shaped molar propelling device. The 3D printing U-shaped molar propelling device comprises a 3D printing retention part and a propelling mechanism, the retention piece is arranged on an abutment tooth and is used for fixing the propelling mechanism, and the propelling mechanism is positioned at an edentulous position and is used for providing support for adjacent teeth on two sides of the edentulous position. All the components can be printed and formed by adopting a 3D printing technology, personalized customization on-site processing can be performed according to the oral cavity structure of a wearer, the manufacturing speed is high, the number of times of re-consultation of the wearer is optimized, the propelling device can be tightly attached to the tooth surface, and therefore the foreign body sensation of the wearer is reduced while stable support between teeth is provided; the propelling mechanism is small and exquisite in structure and can be hidden between tooth gaps, so that the influence of the propelling device on other oral activities of the wearer is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of orthodontic appliances, and in particular to a 3D printed U-shaped molar advancement device. Background Art

[0002] During the development of children, due to acquired diseases such as caries, periodontitis, apical periodontitis and congenital diseases, the children's deciduous teeth are lost prematurely. At the same time, the permanent tooth germs are still developing and there is no sign of eruption. If no treatment is done, the teeth on both sides of the child's missing tooth gap will tend to tilt towards the missing tooth gap, which will affect the eruption position of the permanent teeth, causing permanent tooth malformation and subsequently causing jaw malformation.

[0003] The molar advancement device is widely used in oral orthodontic clinic and is a non-dependent orthodontic appliance. The use of this appliance can make the molars move smoothly distally, and use the gap opened up to adjust the molar relationship, relieve dental crowding, and retract the protruding dental arch, etc., so as to achieve the purpose of correcting malocclusion without tooth extraction, so that the patient can obtain a harmonious appearance, stable occlusion relationship and neatly arranged teeth.

[0004] The utility model with patent application number CN201420650167.8 discloses a molar pusher, which installs an arc-shaped fixing plate and an inclined rod on the surface of the teeth, and connects the two through a horizontal bottom rod with a force spring, thereby pushing the molars to move distally and supporting the premolars to move mesially. However, the complex structure and installation position of this application will give the wearer a strong foreign body sensation, which brings inconvenience to the debugging and subsequent maintenance during the correction process. Utility Model Content

[0005] In order to solve the technical problem of poor wearing experience of molar pushers in the related art, the present application provides a 3D printed U-shaped molar pusher.

[0006] The 3D printed U-shaped molar propulsion device provided in this application adopts the following technical solution:

[0007] A 3D printed U-shaped molar propulsion device comprises a 3D printed retaining piece and a propulsion mechanism; the retaining piece is installed on a base tooth to fix the propulsion mechanism, and the propulsion mechanism is located at a missing tooth to provide support for adjacent teeth on both sides of the missing tooth.

[0008] Preferably, the propulsion mechanism includes: a support member and a buffer mechanism; the buffer mechanism is installed on the retaining member to provide supporting force for the support member, the supporting surface of the support member is in contact with the adjacent teeth, and the end of the support member away from the supporting surface is connected to the buffer mechanism.

[0009] Preferably, the buffer mechanism comprises: a connecting seat and an elastic member; the connecting seat is mounted on the retaining member, and the support member is slidably connected in the connecting seat; the elastic member is arranged between the support member and the connecting seat to provide elastic supporting force for the support member.

[0010] Preferably, the support member is provided with a clamping member for preventing the support member from being ejected from the connecting seat.

[0011] Preferably, the retaining member comprises a band ring with upper and lower openings, and the band ring is sleeved on the abutment and fits with the side surface of the abutment.

[0012] Preferably, the propulsion mechanism includes: an integrated elastic support member, the integrated elastic support member includes: a limiting portion and a bendable elastic support portion; one end of the elastic support portion is in contact with the adjacent tooth, and the other end is connected to the limiting portion, wherein a portion of the elastic support portion can slide relatively along the limiting portion.

[0013] Preferably, an arc-shaped plate that fits against the surface of the adjacent tooth is provided between the integrated elastic support member and the adjacent tooth.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. All components of the present application can be printed using 3D printing technology, and can be customized on-site according to the wearer's oral structure. The production speed is fast, which optimizes the number of follow-up visits for the wearer, and can make the propulsion device fit closely to the tooth surface, thereby providing stable support between the teeth while reducing the wearer's foreign body sensation; and the propulsion mechanism in the present application has a small structure and can be hidden between the teeth, further reducing the impact of the propulsion device on other oral activities of the wearer.

[0016] 2. The present application can adjust the support strength according to the tooth gap through the cooperation of the support member and the buffer mechanism, without the need to grind the teeth, thus simplifying the assembly difficulty. The elastic support force provided by the elastic member enables the present application to not only maintain the tooth gap and prevent the adjacent teeth from tilting toward the pressure groove of the missing teeth, but also realize the distal movement of the molars and the mesial movement of the premolars, compared with the traditional fixed molar retaining device, with good advancement effect and lasting retention effect.

[0017] 3. The propulsion mechanism of the present application adopts an integrated design with a streamlined structure. The internal components are easy to clean and not prone to residual food residues. It can effectively reduce the mechanical failure rate and improve the durability of the molar propulsion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0019] Figure 2 It is a schematic diagram of the structure of the first embodiment of the present application installed on the teeth.

[0020] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0021] Figure 4 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0022] Explanation of the accompanying drawings: 1. Retaining member; 2. Propelling mechanism; 21. Support member; 22. Connecting seat; 23. Elastic member; 24. Clamp; 3. Integrated elastic supporting member; 31. Limiting portion; 32. Elastic supporting portion; 4. Arc plate. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the present application with reference to the description.

[0024] Embodiment 1

[0025] Figure 1 and Figure 2 The embodiment of the present application shown provides a 3D printed U-shaped molar propulsion device, including a 3D printed retaining member 1 and a propulsion mechanism 2; the retaining member 1 is installed on the abutment tooth to fix the propulsion mechanism 2, and the propulsion mechanism 2 includes: a support member 21, a connecting seat 22 and an elastic member 23. The propulsion mechanism 2 is located in the interdental gap of the missing tooth, which can not only support the adjacent teeth on both sides of the missing tooth, but also play a avoiding effect, which can reduce the impact of the device on oral activities.

[0026] The retaining member 1 can be a band ring with upper and lower openings, which is mounted on the abutment and fits with the side surface of the abutment; the 3D printed band ring has good fit with the teeth, is easy to assemble and disassemble, and does not cover the upper surface of the molar when it is mounted on the molar, so that the occlusal surface of the molar will not be affected by the retaining member 1 when chewing food, further improving the wearer's usage experience.

[0027] The connecting seat 22 is installed on both sides of the retaining member 1 to limit the supporting member 21; when the retaining member 1 is produced by 3D printing, the side wall of the retaining member 1 can be thickened, and a through hole can be directly opened on the side wall of the retaining member 1 as the connecting seat 22. When the retaining member 1 is produced by 3D printing, a protruding connecting seat 22 can be simultaneously printed on the side of the retaining member 1, so that the connecting seat 22 and the retaining member 1 are an integrated structure.

[0028] The support member 21 can be a support rod of a U-shaped structure, both ends of the support rod respectively pass through the connecting seat 21 and can slide relative to the connecting seat 21, the middle part of the support rod is an arc shape that fits the surface of the adjacent teeth, and the two sides of the support rod are arc shapes that match the dentition; the rounded lines of the support rod can provide a support effect similar to that of the teeth and feel comfortable to touch; using the above-mentioned technical method, the position of the movable support member 21 can be adjusted according to the wearer's correction situation, thereby avoiding the need to re-make the equipment after each adjustment of the correction plan, thereby reducing the correction cost.

[0029] The elastic member 23 can be a support spring, which is sleeved on the rod body of the support rod. One end of the support spring is pressed against the edge of the connecting seat 22, and the other end is pressed against the middle of the support rod. After wearing the device of the present application, the support spring is in a compressed state, so that the support rod maintains a tendency to move away from the retaining member 1, thereby playing a role in pushing the teeth; the poundage of the support spring can be customized according to the degree of dental crowding of the wearer, and the supporting force between the teeth can be changed by replacing support springs of different pounds; the design of the support spring makes the present application, compared with the traditional fixed molar retaining device, not only able to maintain the inter-tooth gap, prevent the adjacent teeth from tilting toward the pressure groove of the missing teeth, and leave space for the eruption of deciduous teeth or dental implants, but also can realize the distal movement of molars and the mesial movement of premolars, change the degree of dental crowding, and has the advantages of good pushing effect and lasting retention effect.

[0030] Among them, both ends of the support rod are provided with clamps 24 for preventing the support rod from popping out of the connecting seat 22; when the device needs to be removed for adjustment, the support rod is easy to pop out of the connecting seat 22 due to the release of the elastic potential energy of the supporting spring. At this time, the clamp 24 connected to the end of the support rod can be against one side of the connecting seat 22 to prevent the support rod from further popping out. It can be understood that the clamp 24 can be detachably installed at the end of the support rod by means of a threaded connection to facilitate disassembly and assembly when replacing the support spring.

[0031] During the treatment process of related orthodontic equipment, it is necessary to wait for the tooth extraction wound to heal, make an intraoral impression, try on the ring, and pour a plaster model. Then, the technician bends the arm end of the advancement device, welds it, grinds and polishes it, and finally the doctor tries it in the patient's mouth. The patient needs at least two follow-up visits. In the 3D printed U-shaped molar advancement device provided in this embodiment, the doctor only needs to perform a digital scan in the wearer's mouth to generate a three-dimensional model of the wearer's mouth, and design and manufacture it on this basis. The 3D printed molar advancement device has the characteristics of high precision, high efficiency and high reliability, which can greatly reduce the production time and manual errors. The 3D printed U-shaped molar advancement device provided in this embodiment has a good fit with the teeth, so that the wearer does not feel a foreign body sensation, and the characteristics of easy disassembly and assembly and adjustable support strength can bring better correction effects to the wearer.

[0032] Embodiment 2

[0033] See also Figure 3 The embodiment of the present application provides a 3D printed U-shaped molar propulsion device, which is different from the first embodiment in that: in the present embodiment, the propulsion mechanism includes: a bendable integrated elastic support member 3, and the integrated elastic support member 3 includes: a limiting portion 31 and an elastic support portion 32; wherein the limiting portion 31 can be a limiting guide rod connected to the retaining member 1, used to limit the moving direction of the elastic support portion; one end of the elastic support portion 32 is bent and connected to the limiting portion 31, and the middle part of the elastic support portion 32 is arranged around the outside of the limiting portion 31 so that the two can slide relative to each other, and the other end of the elastic support portion 31 is in contact with the tooth; after the retaining member 1 is fixed on the tooth by the above-mentioned technical method, the part of the elastic support portion 31 that contacts the tooth can resist the tooth, and the bent part of the elastic support portion 32 can provide the elastic force required to support the tooth, and the larger the bending amplitude, the more elastic force provided The stronger the elastic force; the partial elastic support part 32 arranged on the limiting part 31 can slide along the limiting part 31 when subjected to the pressure transmitted from the teeth, and change the bending amplitude of the bending part of the elastic support part 32, thereby realizing the change of the elastic supporting force; it can be understood that the length of the limiting guide rod is determined according to the correction plan of the wearer to avoid the influence of too long length on the wearing feeling, and the retaining part 1 can adopt the same structure as that in the first embodiment to ensure the wearing comfort and fit; a 3D printed U-shaped molar propulsion device provided in this embodiment has a streamlined structure, and the internal cleaning of the component is convenient and not easy to leave food residues, which can effectively reduce the mechanical failure rate and improve the durability of the molar propulsion device. The supporting force of the integrated elastic support part 3 can be gradually reduced as the tooth gap is restored, and it can be printed and formed at one time through 3D printing technology to improve the accuracy and efficiency of adjacent tooth inclination correction.

[0034] See also Figure 4 In order to make the connection between the tooth and the elastic support part 32 more stable, an arc plate 4 that fits the surface of the adjacent tooth is arranged between the integrated elastic support member and the adjacent tooth to increase the force-bearing area between the tooth and the elastic support part 32, so that the tooth is half-wrapped in the arc plate 4 to protect the tooth surface from indentations; the part of the support rod in contact with the tooth in Example 1 can be protected by the same arc plate 4.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A 3D printed U-shaped molar advancement device, characterized in that: It comprises a 3D-printed retaining member (1) and a propulsion mechanism (2); the retaining member (1) is mounted on an abutment tooth for fixing the propulsion mechanism (2); the propulsion mechanism (2) is located at a missing tooth and is used to provide support for adjacent teeth on both sides of the missing tooth.

2. The 3D printed U-shaped molar advancement device according to claim 1, characterized in that: The propulsion mechanism (2) comprises: a support member (21) and a buffer mechanism; the buffer mechanism is mounted on the retaining member (1) and is used to provide a supporting force for the support member (21); a supporting surface of the support member (21) is in contact with an adjacent tooth; and an end of the support member (21) away from the supporting surface is connected to the buffer mechanism.

3. The 3D printed U-shaped molar propulsion device according to claim 2, characterized in that: The buffer mechanism comprises: a connecting seat (22) and an elastic member (23); the connecting seat (22) is mounted on the retaining member (1), and the support member (21) is slidably connected in the connecting seat (22); the elastic member (23) is arranged between the support member (21) and the connecting seat (22) to provide an elastic supporting force for the support member (21).

4. The 3D printed U-shaped molar propulsion device according to claim 3, characterized in that: The support member (21) is provided with a clamping member (24) for preventing the support member (21) from being ejected from the connection seat (22).

5. The 3D printed U-shaped molar propulsion device according to claim 1, characterized in that: The retaining member (1) comprises a belt ring with upper and lower openings, the belt ring being sleeved on the abutment and fitting against the side surface of the abutment.

6. The 3D printed U-shaped molar propulsion device according to claim 1, characterized in that: The propulsion mechanism (2) comprises: an integrated elastic support member (3), wherein the integrated elastic support member (3) comprises: a limiting portion (31) and a bendable elastic support portion (32); one end of the elastic support portion (32) is in contact with the adjacent tooth, and the other end is connected to the limiting portion (31), wherein a portion of the elastic support portion (32) can slide relatively along the limiting portion (31).

7. The 3D printed U-shaped molar propulsion device according to claim 6, characterized in that: An arc-shaped plate (4) is arranged between the integrated elastic support member (3) and the adjacent tooth and is fitted to the surface of the adjacent tooth.

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