Digitized 3D retention device

Abstract

The utility model relates to orthodontic medical instrument technical field discloses digital 3D retaining device, the device includes two groups of symmetry setting correction assembly and the quick -mounting mechanism connected in it, each group assembly contains integrated correction block and connecting frame, and the half resistance jaw block fixed to the outer wall of connecting frame, the quick -mounting mechanism includes M type fixed block and connecting rod, and the first, second fixed link is equipped with in the extension of connecting rod end, and the integrative setting of L type link with elastic deformation ability is between two, M type fixed block is set up and is inserted to the insertion channel of two fixed links, when assembling, L type link force bending avoids, after fixed link inserts in place, L type link relies on elastic reset and is locked in M type fixed block side wall and realizes. The utility model utilizes the elastic buckle cooperation of L type link and double -bar guiding structure, has realized the quick assembly and disassembly without tools, and the connection is stable, and the torsional resistance is excellent, has greatly promoted the clinical operation efficiency and patient wearing experience.

Description

Technical Field

[0001] This utility model relates to the field of dental orthodontic medical device technology, and in particular to a digital 3D fixation device. Background Technology

[0002] After orthodontic treatment, patients typically need to wear retention devices for an extended period to prevent teeth from reverting to their pre-treatment positions and to consolidate the treatment results. With the rapid development of digital dental technology, the creation of personalized retention devices using intraoral scan data combined with 3D printing technology has become a mainstream trend. These digitally customized devices can be precisely molded according to the patient's tooth and soft tissue morphology, offering significant improvements in fit and retention compared to traditional hand-bent retainers.

[0003] However, when faced with complex retention requirements necessitating a split design or specific support structure, existing digital retention devices still exhibit significant shortcomings in their connection structure design. Current retention devices with a split structure typically rely on traditional spiral expander structures or complex wire clips for connection between the left and right parts. These traditional connection methods result in bulky structures that occupy valuable tongue movement space, leading to a strong foreign body sensation for patients and severely impacting pronunciation and swallowing functions.

[0004] More importantly, existing connection mechanisms are flawed in terms of ease of operation. Most connection structures, in order to ensure stability, are often designed to be overly tight or complex, typically requiring specialized adjustment keys or auxiliary tools for installation or removal. This not only increases the difficulty and time cost for clinicians but also makes it difficult for patients to insert, remove, and clean the device themselves in daily life, easily leading to oral hygiene problems due to inadequate cleaning. Currently, there is a lack of a compact, stable, and tool-free fixation device connection solution that allows for quick manual locking and disassembly.

[0005] Therefore, this utility model proposes a digital 3D fixation device to address the shortcomings of existing technologies. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a digital 3D retention device, which aims to improve the problems of existing oral retention devices being complex in structure, cumbersome in assembly, and lacking convenient and reliable quick-release connection structures.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a digital 3D fixation device, comprising: two sets of symmetrically arranged orthodontic components, and a quick-release mechanism connecting the two sets of orthodontic components; each set of orthodontic components includes an orthodontic block, a connecting frame, and a semi-jaw block; the connecting frame and the orthodontic block are integrally formed, and the semi-jaw block is fixedly installed on the outer wall of the connecting frame.

[0008] The quick-release mechanism includes an M-shaped fixing block and a connecting rod. The M-shaped fixing block is fixed to one of the half-jaw blocks, and the connecting rod is fixed to the other half-jaw block. The connecting rod extends towards the M-shaped fixing block and includes a first fixing rod and a second fixing rod, with an L-shaped rod integrally formed between them. The M-shaped fixing block has an insertion channel for the first fixing rod and the second fixing rod to be inserted.

[0009] Furthermore, the L-shaped rod has elastic deformation capability and is configured to bend away from the second fixing rod under external force to form a clearance opening. After the first and second fixing rods are inserted into the M-shaped fixing block, the L-shaped rod elastically resets itself and abuts against the side wall of the M-shaped fixing block near the end of the second fixing rod, thereby locking the two sets of orthodontic components. This elastic snap-fit ​​structure enables quick connection and locking of the device.

[0010] Preferably, the L-shaped rod includes an elastic arm connected to the connecting rod and an operating lever disposed at the end of the elastic arm. The operating lever protrudes from the plane containing the first fixed rod and the second fixed rod, so as to facilitate the application of external force to drive the L-shaped rod to deform. This protruding operating structure makes blind operation in the confined space of the oral cavity easier.

[0011] Preferably, the M-shaped fixing block has two guide holes on its end face facing the connecting rod, corresponding to the positions of the first fixing rod and the second fixing rod, respectively. The first fixing rod and the second fixing rod are slidably engaged in the corresponding guide holes. This double-hole, double-rod engagement not only provides guidance but also effectively prevents relative torsion between the components.

[0012] Preferably, the L-shaped rod is positioned at the exact midpoint between the first fixing rod and the second fixing rod, and the L-shaped rod, the first fixing rod, the second fixing rod, and the connecting rod are all integrally formed from the same material. This integral structural design avoids the risk of loose connections that may arise from assembling multiple components, while also ensuring uniform stress transmission.

[0013] Preferably, the orthodontic block and the connecting frame are resin components digitally modeled and 3D printed based on the patient's tooth shape, and the orthodontic block has an internal cavity that conforms to the patient's teeth. Digital customization ensures a perfect fit between the device and the patient's dentition, improving retention.

[0014] Preferably, the semi-abutment has a biomimetic curved surface that conforms to the shape of the patient's palate. The semi-abutment is fixed to the side of the connecting frame facing the inside of the oral cavity by adhesive bonding, and the quick-release mechanism is located between the opposing sidewalls of the two semi-abutments. The biomimetic curved surface design can distribute the pressure on the palatal mucosa, significantly improving wearing comfort.

[0015] Preferably, the end of the connecting rod away from the first fixing rod is embedded and fixed inside the corresponding half-jaw block, and the end of the M-shaped fixing block away from the insertion channel is embedded and fixed inside the corresponding other half-jaw block. This embedded fixing method increases the force-bearing area and prevents the connecting components from falling off during long-term stress.

[0016] Preferably, the first fixing rod and the second fixing rod are arranged parallel to each other, and the lengths of the first fixing rod and the second fixing rod are equal. This parallel design ensures smooth insertion and prevents jamming.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting a quick-assembly mechanism between two sets of orthodontic components, the elastic deformation and reset characteristics of the L-shaped rod integrally formed on the connecting rod are utilized to cooperate with the end face of the M-shaped fixing block on the opposite side for abutment and locking. This solves the problems of complex connection structure of existing retention devices, the need for professional tools for disassembly and assembly, and the cumbersome operation process. It achieves the technical effect of quick assembly and disassembly of the device in the oral cavity without additional tools, which greatly improves the efficiency of doctors' operation and the convenience of patients' use.

[0018] 2. In this utility model, by setting a first fixed rod and a second fixed rod that are parallel to each other at the end of the connecting rod, and sliding them together with the corresponding insertion channel in the M-shaped fixed block, the problem of relative rotation or shaking that easily occurs when the traditional single-point connection is subjected to force, thus affecting the retention effect, is solved. This achieves excellent anti-torsion performance and connection stability, ensuring that the two orthodontic components can maintain a precise relative position in the oral cavity, thereby providing a continuous and stable retention force.

[0019] 3. In this utility model, by using digital modeling and 3D printing technology to produce orthodontic blocks and semi-jaw blocks that closely fit the shape of the patient's teeth and palate, and in conjunction with a biomimetic curved surface design, the problems of poor adaptability, strong foreign body sensation, and easy ulceration caused by sharp edges compressing oral soft tissues in traditional universal devices are solved. The technical effects of precise coverage and fixation, high wearing comfort, and effective protection of oral mucosa are achieved. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the digital 3D fixation device proposed in this utility model; Figure 2 This is a split diagram of the digital 3D fixation device proposed in this utility model; Figure 3 This is a schematic diagram of the semi-jaw block structure of the digital 3D fixation device proposed in this utility model; Figure 4 This is a schematic diagram of the second fixing rod part of the digital 3D fixation device proposed in this utility model.

[0021] Legend: 1. Orthodontic block; 2. Connecting frame; 3. Semi-jaw block; 4. Quick-release mechanism; 401. Connecting rod; 402. First fixing rod; 403. Second fixing rod; 404. L-shaped rod; 405. M-shaped fixing block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Please refer to Figures 1 to 4 This utility model provides a digital 3D retention device, which aims to solve the problems of existing oral retention devices being complex in structure, cumbersome in assembly, and lacking convenient and reliable quick-release connection structures.

[0024] The digital 3D retention device mainly consists of two sets of symmetrically arranged orthodontic components and a quick-release mechanism 4 connecting the two sets of orthodontic components. The quick-release mechanism 4 is used to realize the rapid docking and locking of the two sets of orthodontic components in the oral cavity, and also facilitates subsequent disassembly and maintenance.

[0025] Each orthodontic component serves as the basic support unit of the device, comprising an orthodontic block 1, a connector 2, and a semi-recessed block 3. The connector 2 acts as the core framework, connecting the orthodontic block 1 and the semi-recessed block 3. The orthodontic block 1 is located at the end of the connector 2 facing away from the inside of the mouth. The orthodontic block 1 has a 3D-printed, encasing cavity formed by digital modeling based on the patient's tooth shape. This cavity provides a tight fit and envelops the patient's teeth to provide retention. The connector 2 and orthodontic block 1 are manufactured from resin material using a one-piece molding process to ensure the overall structural strength and connection stability. The semi-recessed block 3 is fixedly mounted on the outer wall of the connector 2 facing the inside of the mouth. The semi-recessed block 3 has a biomimetic curved surface that closely conforms to the shape of the patient's maxillary surface, distributing retention pressure and improving wearing comfort. The semi-recessed block 3 is securely connected to the side of the connector 2 by adhesive bonding.

[0026] The quick-release mechanism 4 is positioned between two opposing semi-jaw blocks 3. Specifically, the quick-release mechanism 4 includes an M-shaped fixing block 405 fixedly installed on the side wall of one of the semi-jaw blocks 3, and a connecting rod 401 fixedly installed on the side wall of the other semi-jaw block 3. The end of the connecting rod 401 furthest from the center of the quick-release mechanism 4 is embedded and fixed inside the corresponding semi-jaw block 3, and the end of the M-shaped fixing block 405 facing away from the connecting rod 401 is also embedded and fixed inside its corresponding semi-jaw block 3, thus ensuring the stability of the load-bearing structure.

[0027] The connecting rod 401 extends towards one end of the M-shaped fixing block 405 and forks to form a first fixing rod 402 and a second fixing rod 403 arranged in parallel. The length of the first fixing rod 402 is equal to the length of the second fixing rod 403, and their axes are parallel to each other. An L-shaped rod 404 is also integrally provided between the connecting rod 401 and the first fixing rod 402 and the second fixing rod 403, and the L-shaped rod 404 is located at the exact center of the first fixing rod 402 and the second fixing rod 403. The connecting rod 401, the first fixing rod 402, the second fixing rod 403, and the L-shaped rod 404 are an integral structure made of the same material. This structural design not only simplifies the manufacturing process but also ensures the connection strength between the components.

[0028] The M-shaped fixing block 405 has an insertion channel on the side facing the connecting rod 401. This insertion channel specifically includes two guide holes corresponding to the positions of the first fixing rod 402 and the second fixing rod 403, respectively. The first fixing rod 402 and the second fixing rod 403 can be inserted into and slidably fitted into their respective guide holes. This double-rod insertion method effectively prevents relative torsion of the two sets of orthodontic components, ensuring the stability of the connected device.

[0029] L-shaped rod 404 is disposed between the first fixed rod 402 and the second fixed rod 403 extending from the connecting rod 401. L-shaped rod 404 has a vertical arm perpendicularly connected to the connecting rod 401 and a horizontal operating arm located at the end of the vertical arm. Utilizing the elastic properties of its material, L-shaped rod 404 is configured to undergo elastic bending deformation when subjected to a lateral external force and automatically return to its initial state after the external force disappears. As the main movable locking component, L-shaped rod 404 provides axial restraint for the connection of the two sets of orthodontic components, preventing accidental separation of the devices.

[0030] Meanwhile, the M-shaped fixing block 405 is provided with two guide holes that are respectively adapted to the dimensions of the first fixing rod 402 and the second fixing rod 403, and the outer wall surface of the M-shaped fixing block 405 near the insertion position of the second fixing rod 403 forms a locking abutment surface for positioning the L-shaped rod 404. In the assembled state, the first fixing rod 402 and the second fixing rod 403 slide in the guide holes of the M-shaped fixing block 405. This parallel insertion and engagement structure of the two rods ensures high stability and torsional resistance after the connecting rod 401 is connected to the M-shaped fixing block 405.

[0031] During the assembly process, the horizontal operating arm of the L-shaped rod 404 is moved by hand, forcing the L-shaped rod 404 to bend elastically away from the second fixing rod 403, thereby creating an opening between the first fixing rod 402 and the second fixing rod 403 for the side wall of the M-shaped fixing block 405 to enter. Then, the semi-jaw block 3 with the connecting rod 401 is pushed into the M-shaped fixing block 405, so that the first fixing rod 402 and the second fixing rod 403 are fully inserted into the M-shaped fixing block 405. Once inserted, the L-shaped rod 404 is released, and it returns to its original position due to elastic restoring force, its end tightly abutting the locking abutment surface of the M-shaped fixing block 405. This structure utilizes the mechanical blocking effect of the L-shaped rod 404 after its return to its original position to achieve a stable locking of the two sets of orthodontic components.

[0032] As a preferred embodiment, in order to facilitate the user to accurately operate the L-shaped rod 404 in the narrow space of the oral cavity, the horizontal operating arm of the L-shaped rod 404 is designed to protrude from the plane where the first fixed rod 402 and the second fixed rod 403 are located, and the end of the protruding part can be designed with anti-slip texture or finger pressure groove to increase the friction when the finger is flicked and prevent the operation from slipping.

[0033] As another preferred embodiment, to ensure the overall structural strength of the device and simplify the production process, the L-shaped rod 404, the first fixing rod 402, the second fixing rod 403, and the connecting rod 401 are preferably made of the same medical-grade metal material or high-strength medical-grade polymer resin through integrated injection molding or 3D printing. The integrated structure eliminates connection points, avoiding stress concentration and breakage risks caused by welding or assembly tolerances. Furthermore, the connection root between the L-shaped rod 404 and the connecting rod 401 can be designed with a rounded corner transition to further disperse stress and extend the service life of the L-shaped rod 404 under repeated elastic deformation.

[0034] In a preferred embodiment, to improve the smoothness of sliding of the first fixing rod 402 and the second fixing rod 403 within the M-shaped fixing block 405, and to reduce the shaking caused by assembly gaps, the inner wall of the guide hole inside the M-shaped fixing block 405 is polished or coated with a biocompatible lubricating coating. The outer diameters of the first fixing rod 402 and the second fixing rod 403 form a clearance fit with the inner diameter of the guide hole, with the fit tolerance controlled at the micrometer level, ensuring both smooth insertion and removal and stability after assembly.

[0035] As another preferred embodiment, to improve wearing comfort and protect oral soft tissues, the orthodontic block 1 and the connecting frame 2 are preferably digitally modeled based on the patient's tooth shape and formed using 3D printing technology with transparent photosensitive resin. The encapsulating cavity inside the orthodontic block 1 fits perfectly with the tooth surface, enabling even distribution of orthodontic force. The semi-recessed palate block 3 has a biomimetic curved surface that highly matches the shape of the patient's maxilla, and its edges are rounded and chamfered to effectively prevent sharp edges from causing scratches or pressure ulcers to the tongue or palatal mucosa. The semi-recessed palate block 3 is firmly bonded to the inside of the connecting frame 2 with medical adhesive, forming a stable support structure.

[0036] Working principle: When this digital 3D retention device is needed, it is first customized based on the patient's oral scan data. The orthodontic block 1 and the connecting frame 2, conforming to the patient's tooth morphology, are integrally manufactured using 3D printing technology. A semi-abutment block 3, conforming to the shape of the patient's maxilla, is then fixedly installed on the outer wall of the connecting frame 2. At this point, two sets of symmetrical components are prepared. Each set of components includes the orthodontic block 1, the connecting frame 2, and the semi-abutment block 3. A quick-release mechanism 4 is located between the two semi-abutment blocks 3 to connect these two sets of components.

[0037] When it is necessary to assemble and fix the left and right sets of components, the operator uses their fingers to operate the horizontal operating arm of the L-shaped rod 404 located on one side of the connecting rod 401. Under the action of external force, the L-shaped rod 404 overcomes the elastic resistance of the material and undergoes elastic bending deformation in a direction away from the second fixing rod 403, thereby forming a clearance opening at the end of the connecting component. At this time, holding the component with the connecting rod 401, the operator aligns the first fixing rod 402 and the second fixing rod 403 and inserts them into the insertion channel of the M-shaped fixing block 405 on the other component.

[0038] After the first fixing rod 402 and the second fixing rod 403 are fully inserted, the external force applied to the L-shaped rod 404 is released. At this time, the L-shaped rod 404 automatically resets itself due to the elastic restoring force of the material, and its end tightly abuts against the end face of the M-shaped fixing block 405 near the second fixing rod 403. The mechanical obstruction formed by the reset L-shaped rod 404 restricts the degree of freedom of the connecting rod 401 to exit from the M-shaped fixing block 405, thereby achieving a stable lock of the two sets of orthodontic blocks 1, the connecting frame 2, and the semi-jaw block 3.

[0039] When disassembly of the device is required, the L-shaped rod 404 is moved again to cause it to bend elastically and move away from the end face of the M-shaped fixing block 405, thus releasing the locking restriction on the M-shaped fixing block 405. Then, the connecting rod 401 can smoothly pull the first fixing rod 402 and the second fixing rod 403 out of the M-shaped fixing block 405, thereby achieving quick disassembly of the device. Throughout the process, the L-shaped rod 404, as an elastic latch located between the first fixing rod 402 and the second fixing rod 403 and integrally formed with the connecting rod 401, plays a crucial role in quick disassembly and assembly.

Claims

1. A digital 3D fixation device, comprising: Two sets of symmetrically arranged orthodontic components, and a quick-release mechanism (4) connecting the two sets of orthodontic components; Each set of the orthodontic components includes an orthodontic block (1), a connecting frame (2), and a semi-jaw block (3). The connecting frame (2) and the orthodontic block (1) are integrally formed. The semi-jaw block (3) is fixedly installed on the outer wall of the connecting frame (2). The characteristic feature is that: The quick-release mechanism (4) includes an M-shaped fixing block (405) and a connecting rod (401). The M-shaped fixing block (405) is fixed to one of the half-jaw blocks (3), and the connecting rod (401) is fixed to the other half-jaw block (3). The connecting rod (401) extends toward one end of the M-shaped fixing block (405) and is provided with a first fixing rod (402) and a second fixing rod (403), and an L-shaped rod (404) is integrally provided between the two. The M-shaped fixing block (405) has an insertion channel for inserting the first fixing rod (402) and the second fixing rod (403); The L-shaped rod (404) has elastic deformation capability and is configured to bend away from the second fixing rod (403) under external force to form a clearance opening. After the first fixing rod (402) and the second fixing rod (403) are inserted into the M-shaped fixing block (405), the L-shaped rod (404) elastically resets itself and abuts against the side wall of the M-shaped fixing block (405) near the end of the second fixing rod (403), thereby locking the two sets of the orthodontic components.

2. The digital 3D fixation device according to claim 1, characterized in that, The L-shaped rod (404) includes an elastic arm connected to the connecting rod (401) and an operating lever disposed at the end of the elastic arm. The operating lever protrudes from the plane where the first fixed rod (402) and the second fixed rod (403) are located, so as to apply external force to drive the L-shaped rod (404) to deform.

3. The digital 3D fixation device according to claim 1, characterized in that, The M-shaped fixing block (405) has two guide holes on one end face facing the connecting rod (401), which are respectively corresponding to the positions of the first fixing rod (402) and the second fixing rod (403). The first fixing rod (402) and the second fixing rod (403) are slidably engaged in the corresponding guide holes.

4. The digital 3D fixation device according to claim 1, characterized in that, The L-shaped rod (404) is positioned at the exact center between the first fixed rod (402) and the second fixed rod (403), and the L-shaped rod (404), the first fixed rod (402), the second fixed rod (403) and the connecting rod (401) are an integral structure made of the same material.

5. The digital 3D fixation device according to claim 1, characterized in that, The orthodontic block (1) and the connecting frame (2) are resin components formed by digital modeling and 3D printing based on the shape of the patient's teeth. The orthodontic block (1) has a covered cavity inside that is adapted to the patient's teeth.

6. The digital 3D fixation device according to claim 1, characterized in that, The semi-abutment block (3) has a biomimetic curved surface that conforms to the shape of the patient's palate. The semi-abutment block (3) is fixed to the side of the connecting frame (2) facing the inside of the oral cavity by adhesive bonding, and the quick-release mechanism (4) is located between the opposite sidewalls of the two semi-abutment blocks (3).

7. The digital 3D fixation device according to claim 1, characterized in that, The end of the connecting rod (401) away from the first fixing rod (402) is embedded and fixed inside the corresponding half-jaw block (3), and the end of the M-shaped fixing block (405) away from the insertion channel is embedded and fixed inside the corresponding other half-jaw block (3).

8. The digital 3D fixation device according to claim 1, characterized in that, The first fixing rod (402) and the second fixing rod (403) are arranged parallel to each other, and the length of the first fixing rod (402) is equal to the length of the second fixing rod (403).

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