An embedded tooth sequence traction device applied to orthodontic treatment
Patent Information
- Application Number
- CN202522632554.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-11
AI Technical Summary
[0020]本申请通过后牙支抗组件，能够为整个序列牵引过程提供一个稳定、可靠的力学锚固基础，有效抵抗和分散牵引力产生的反作用力，从而确保牵引力的高效传递与牙齿移动的精确可控；通过设置包含牵引基板和多个序列牵引钩的个性化序列牵引组件，能够将一条复杂的空间牵引路径物化、分解为一系列离散且有序的施力点，使得医生或患者只需通过简单的更换挂钩操作，即可实现牵引方向和力线的自动、精准切换，极大地简化了临床流程；通过限定多个序列牵引钩沿一预设的非直线牵引路径的空间方向排布，能够主动引导埋伏牙沿着一条预先数字化规划的安全、高效路径移动，从而有效规避邻牙牙根等解剖障碍，显著降低了治疗风险，提高了矫治的安全性；且序列牵引钩通过非直线牵引路径基于患者的四维牙颌模型通过计算机辅助设计生成，能够实现治疗方案的完全个性化定制，使牵引路径与患者的独特牙根、颌骨及牙龈形态完美匹配，从源头上保证了牵引过程的精确性与可预测性，最终获得理想的矫治效果。
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Figure CN224892768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dental orthodontic medical devices, and more specifically, to an impacted tooth sequence traction device for orthodontic treatment. Background Technology
[0002] In orthodontic clinical treatment, the traction correction of impacted teeth (i.e., teeth that have failed to erupt normally) is a complex and challenging task. Traditional traction methods mainly rely on the doctor's clinical experience for visual positioning and force direction design, which has many limitations.
[0003] In existing technologies, for impacted teeth that are deeply located, have complex root morphology, or require avoidance of adjacent tooth roots, multi-step, multi-directional traction is usually required. This necessitates that the dentist manually adjust or change the traction device and force application point at each follow-up visit, based on the tooth movement. This process is not only cumbersome and highly dependent on the dentist's personal experience, leading to long treatment cycles, numerous follow-up visits, and high treatment costs, but it is also difficult to guarantee the accuracy and continuity of the traction force. Furthermore, traditional devices are often uncomfortable and difficult to clean, seriously affecting patient compliance and treatment experience. Utility Model Content
[0004] The purpose of this invention is to provide an impacted tooth traction device for orthodontic treatment, which can realize staged and step-by-step traction of impacted teeth without adding extra traction accessories during the traction process. It has the advantages of high comfort, good cleanability and precise traction, and avoids the disadvantages of traditional traction devices such as low comfort, difficult cleaning and low patient comfort.
[0005] The embodiments of this utility model are implemented as follows:
[0006] This application provides an impacted tooth sequence traction device for orthodontic treatment, comprising:
[0007] Posterior anchorage assembly, the posterior anchorage assembly being adapted for fixation in the posterior tooth region of a patient's oral cavity;
[0008] A personalized sequential traction assembly is connected to the posterior anchorage assembly and located on the opposite side of the target impacted tooth; the personalized sequential traction assembly includes a traction base plate and multiple sequential traction hooks;
[0009] The plurality of sequential traction hooks are arranged on the traction base plate along a preset non-linear traction path in a spatial direction to form a sequential chain for gradually changing the traction force; wherein, the non-linear traction path is generated by computer-aided design based on the patient's four-dimensional dental model, and each sequential traction hook precisely corresponds to a step-by-step movement point on the traction path.
[0010] Furthermore, based on the aforementioned scheme, the posterior anchorage assembly includes a transpalatal bar and a Nance arch.
[0011] Furthermore, based on the aforementioned scheme, when buccal traction is performed, the personalized sequence traction component is connected to the extension archwire portion of the transpalatal bar, and the plurality of sequence traction hooks are arranged along the buccal and mesiodistal spatial directions; wherein, the extension archwire of the transpalatal bar extends in an arc from the molar along the buccal direction.
[0012] Furthermore, based on the aforementioned scheme, when performing palatal traction, the personalized sequence traction component is connected to the palatal resin pad or archwire portion of the Nance bow, and the multiple sequence traction hooks are arranged along the palatal and mesiodistal spatial directions.
[0013] Furthermore, based on the aforementioned scheme, the traction substrate and the sequential traction hooks are integrally molded structures, made of biocompatible metal materials or high-strength resin through 3D printing.
[0014] Furthermore, based on the aforementioned scheme, the biocompatible metal material is a titanium alloy or a cobalt-chromium alloy.
[0015] Furthermore, based on the aforementioned scheme, the four-dimensional dental model is a root-crown-bone-gingival model that integrates data on tooth roots, crowns, jawbones, and gingiva.
[0016] Furthermore, based on the aforementioned scheme, it also includes a traction attachment bonded to the surface of the impacted tooth, the traction attachment being connected to the sequential traction hooks in stages via elastic traction elements.
[0017] Furthermore, based on the aforementioned scheme, the non-linear traction path is configured to avoid adjacent tooth roots by changing the direction of the traction force.
[0018] Furthermore, based on the aforementioned scheme, the traction substrate has a smooth curved surface profile.
[0019] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:
[0020] This application utilizes a posterior anchorage component to provide a stable and reliable mechanical anchorage foundation for the entire sequential traction process, effectively resisting and dispersing the reaction force generated by traction, thereby ensuring efficient transmission of traction force and precise control of tooth movement. By setting up a personalized sequential traction component containing a traction base plate and multiple sequential traction hooks, a complex spatial traction path can be materialized and decomposed into a series of discrete and ordered force application points. This allows doctors or patients to automatically and accurately switch the traction direction and force line simply by changing the hooks, greatly simplifying the clinical process. By limiting the spatial orientation of multiple sequential traction hooks along a preset non-linear traction path, it can actively guide impacted teeth to move along a pre-digitally planned safe and efficient path, thereby effectively avoiding anatomical obstacles such as adjacent tooth roots, significantly reducing treatment risks and improving the safety of orthodontic treatment. Furthermore, the sequential traction hooks are generated by computer-aided design based on the patient's four-dimensional dental and jaw model through a non-linear traction path, enabling completely personalized customization of the treatment plan. This ensures that the traction path perfectly matches the patient's unique tooth root, jawbone, and gingival morphology, guaranteeing the accuracy and predictability of the traction process from the source, ultimately achieving ideal orthodontic results. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the sequence traction device of this utility model installed on the transverse palatine bar anchor.
[0023] Figure 2 This is a schematic diagram of the sequence traction device installed on the Nance arch support according to an embodiment of the present invention.
[0024] Icons: 11-Traction base plate, 12-Sequence traction hook, 21-Transpalatal bar, 22-Nance bow, 13-Extension archwire, 23-Palatal resin pad. Detailed Implementation
[0025] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0026] Please refer to Figures 1-2 The image shows a schematic diagram of the overall structure of an impacted tooth sequence traction device used in orthodontic treatment.
[0027] This embodiment provides an impacted tooth sequence traction device for orthodontic treatment, comprising:
[0028] Posterior anchorage assembly, which is suitable for fixation in the posterior tooth region of the patient's oral cavity;
[0029] A personalized sequential traction assembly is connected to the posterior anchorage assembly and is located on the opposite side of the target impacted tooth; the personalized sequential traction assembly includes a traction base plate 11 and multiple sequential traction hooks 12;
[0030] Multiple sequential traction hooks 12 are arranged on the traction base plate 11 along a preset non-linear traction path in a spatial direction to form a sequential chain for changing the traction force step by step; wherein, the non-linear traction path is generated by computer-aided design based on the patient's four-dimensional dental model, and each sequential traction hook 12 precisely corresponds to a step-by-step movement point on the traction path.
[0031] The exemplary embodiment of this invention will now be further described, including a device for traction of impacted tooth sequences used in orthodontic treatment.
[0032] In some embodiments, the device includes a posterior anchorage assembly and a personalized sequential traction assembly. The posterior anchorage assembly includes a transpalatal bar 21 (TPA) and a Nance arch 22. The archwire of the transpalatal bar 21 is fixed at both ends to the posterior region of the patient's oral cavity (usually the first molar) via molar bands, providing a stable and reliable mechanical fulcrum for the entire traction process. The Nance arch 22 has a palatal resin pad 23 in the middle of its archwire, which remains in close contact with the hard palate to form strong anchorage. The personalized sequential traction assembly is connected to the posterior anchorage assembly and is positioned on the opposite side of the impacted tooth, depending on whether the impacted tooth is located on the buccal or lingual palatal side, to ensure effective application of traction force.
[0033] The personalized sequential traction assembly includes a traction base plate 11 and multiple sequential traction hooks 12. These hooks are not randomly arranged, but strictly follow a pre-planned non-linear traction path designed by computer-aided design (CAD) in three-dimensional space. This path is derived from a four-dimensional integrated dental model (root-crown-bone-gingiva) constructed using the patient's CBCT and intraoral scan data, allowing for precise avoidance of obstacles such as adjacent tooth roots. Each sequential traction hook 12 uniquely corresponds to a step-by-step movement target point on this complex path. As the dentist or patient sequentially changes the elastic traction element (such as a rubber chain) from one hook to the next, the impacted tooth is subjected to forces of different directions and magnitudes, thus being guided step-by-step along the pre-set, safe, and efficient path to its normal dentition position. This design breaks down complex multi-dimensional spatial movement into simple sequential operations, greatly simplifying clinical procedures and shortening the treatment time.
[0034] As a preferred implementation method, the traction device of this application is specifically designed for impacted teeth in different locations, and can be divided into two traction distributions:
[0035] When buccal traction is performed, the personalized sequential traction assembly is connected to the buccal extension archwire 13 of the transpalatal bar 21, and multiple sequential traction hooks 12 on it are arranged along the combined spatial direction of buccal and mesiodistal directions, effectively guiding the teeth back into position from the buccal side.
[0036] When performing palatal traction, the personalized sequential traction component is connected to the palatal resin pad 23 of the Nance bow 22 or its archwire. The sequential traction hooks 12 are arranged along the palatal and mesial-distal directions, achieving aesthetics and concealment during the traction process.
[0037] As a preferred implementation, to ensure the accuracy, strength, and biocompatibility of the device, the traction base plate 11 and the sequential traction hooks 12 are preferably integrally molded and manufactured using 3D printing technology. The selected materials are biocompatible titanium alloys, cobalt-chromium alloys, or high-strength resins. This manufacturing method ensures that each device is custom-made for the patient, while possessing sufficient mechanical performance and wearing comfort. Furthermore, by setting the traction base plate 11, this application can cover and embed the archwire or connectors connecting each sequential traction hook 12, maximizing the protection of soft tissue and avoiding the snagging, friction, or compression that traditional exposed archwires may cause to soft tissue.
[0038] Furthermore, a traction attachment is bonded to the surface of the impacted tooth using light-cured resin. This attachment is connected to the sequential traction hooks 12 in stages via elastic traction elements, forming a complete force transmission system.
[0039] In addition, as a preferred embodiment, the edges of the aforementioned traction substrate 11 are designed with a smooth curved contour, which can effectively avoid scratching or compressing soft tissues such as the oral mucosa and tongue, significantly improving the comfort of the patient when wearing it and facilitating the maintenance of oral hygiene.
[0040] Example 1
[0041] like Figure 1The patient had an impacted canine on the buccal side requiring traction. First, CBCT and 3-shape intraoral scans were used to acquire data on the patient's jawbone and dentition. A four-dimensional integrated model of root-crown-bone-gingiva was reconstructed using software such as Dolphin. On this model, the dentist planned a non-linear traction path that avoided the roots of the lateral incisors and first premolars. This path could be broken down into movements first towards the occipital direction, then distally, and finally gingivally. Based on this path, a personalized sequential traction component was designed using CAD software. This component included a traction base plate 11 made of 3D-printed titanium alloy, and two sequential traction hooks 12 (A1, A2) distributed on it. The traction base plate 11 was fixed to the extension archwire 13 of the transpalatal bar 21 by laser welding. The extension archwire 13 originated from the band fixed to the first molar and extended in an arc along the buccal side towards the vestibular sulcus. The sequential traction hooks 12 (A1, A2) were precisely arranged along the buccal and mesiodistal directions, corresponding to two key points on the path.
[0042] In clinical practice, the traction attachment is first bonded to the surface of the impacted canine. After the device is inserted into the patient's mouth, initially, one end of the rubber chain is attached to the attachment, and the other end is attached to the first sequential traction hook 12A1, applying a traction force F1 in the first direction. At the follow-up visit 4-6 weeks later, no adjustment to the main device is needed; simply replace the rubber chain with the second traction hook A2, and the traction force direction automatically changes to F2. This sequential procedure is repeated until the tooth moves to the desired position along the predetermined path.
[0043] Example 2
[0044] like Figure 2 This embodiment is for a palatal impacted lateral incisor. Its design and implementation are based on the same principle as Embodiment 1, the difference being that the personalized sequential traction component is connected to the archwire of the Nance arch 22 via its base plate. The sequential traction hooks 12 (B1, B2) are arranged along the palatal and mesiodistal directions, with traction occurring on the lingual side, making it more aesthetically pleasing and concealed. The traction base plate 11 also has a smooth curved contour to avoid discomfort to the tongue.
[0045] The beneficial effects of the embodiments of this application are as follows:
[0046] Based on a high-precision four-dimensional dental model, the non-linear traction path can actively avoid adjacent tooth roots, greatly reducing treatment risks. The complex multi-directional traction is simplified into a sequential operation of changing hooks, reducing over-reliance on the doctor's experience and significantly reducing the time per treatment session and the total treatment course. The device has a compact structure and smooth substrate edges, reducing irritation to oral soft tissues and improving patient comfort, thereby increasing treatment compliance. Through digital design and 3D printing, the device can be fully customized, while the sequential traction treatment concept is standardized, ensuring the predictability and stability of treatment results.
[0047] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.
[0048] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.
Claims
1. A device for traction of impacted tooth sequences used in orthodontic treatment, characterized in that, include: Posterior anchorage assembly, the posterior anchorage assembly being adapted for fixation in the posterior tooth region of a patient's oral cavity; A personalized sequential traction assembly is connected to the posterior anchorage assembly and located on the opposite side of the target impacted tooth; the personalized sequential traction assembly includes a traction base plate and multiple sequential traction hooks; The plurality of sequential traction hooks are arranged on the traction base plate along a preset non-linear traction path in a spatial direction to form a sequential chain for gradually changing the traction force; wherein, the non-linear traction path is generated by computer-aided design based on the patient's four-dimensional dental model, and each sequential traction hook precisely corresponds to a step-by-step movement point on the traction path.
2. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, The posterior anchorage assembly includes a transpalatal bar and a Nance arch.
3. The impacted tooth sequence traction device for orthodontic treatment according to claim 2, characterized in that, When buccal traction is performed, the personalized sequence traction assembly is connected to the extension archwire portion of the transpalatal bar, and the plurality of sequence traction hooks are arranged along the buccal and mesiodistal spatial directions; wherein, the extension archwire of the transpalatal bar extends in an arc from the molar along the buccal direction.
4. The impacted tooth sequence traction device for orthodontic treatment according to claim 2, characterized in that, When performing palatal traction, the personalized sequence traction assembly is connected to the palatal resin pad or archwire portion of the Nance bow, and the multiple sequence traction hooks are arranged along the palatal and mesiodistal spatial directions.
5. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, The traction substrate and the sequential traction hooks are integrally molded structures, made of biocompatible metal materials or high-strength resin through 3D printing.
6. The impacted tooth sequence traction device for orthodontic treatment according to claim 5, characterized in that, The biocompatible metallic material is a titanium alloy or a cobalt-chromium alloy.
7. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, The four-dimensional dental model is a root-crown-bone-gingival model that integrates data on tooth roots, crowns, jawbones, and gingiva.
8. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, It also includes a traction attachment bonded to the surface of the impacted tooth, the traction attachment being connected to the sequence of traction hooks in stages via elastic traction elements.
9. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, The non-linear traction path is configured to avoid the roots of adjacent teeth by changing the direction of the traction force.
10. The impacted tooth sequence traction device for orthodontic treatment according to claim 1, characterized in that, The traction substrate has a smooth curved profile.