Traction guide plate for embedded canine on buccal side and traction method of traction guide plate

Abstract

The invention relates to the technical field of orthodontics, in particular to a buccal side embedded canine tooth traction guide plate and a traction method thereof.The traction guide plate comprises a fixing end and a traction end, the fixing end is of a rectangular structure, the fixing end is fixed to an orthodontic bracket and an orthodontic arch wire on rear teeth through metal ligature wires, and the traction end is connected with the metal ligature wires. A traction end is mounted on the side, close to the embedded teeth, of the fixed end, the traction end is of a bent arc-shaped structure, a first traction position and a second traction position are arranged on the traction end, and the traction end is connected with a traction site bonded to the embedded canine teeth through an elastic rubber chain so as to pull the embedded canine teeth; according to the invention, the arc-shaped traction end with the first traction position and the second traction position is designed, the first hook is utilized to realize inclined movement of the embedded canine from the embedded position to the target area in the first stage, and the plurality of second hooks are utilized to realize vertical positioning and fine position adjustment of the teeth in the second stage; the accuracy and controllability of a tooth moving path are improved, and the treatment period is shortened.

Description

Technical Field

[0001] This application relates to the field of orthodontic technology, and in particular to a buccal impacted canine traction guide plate and its traction method. Background Technology

[0002] Impacted canines are a common dental anomaly in orthodontics, affecting approximately 1%-3% of patients, with a higher incidence in women than men. Impacted maxillary canines not only impair occlusion but can also lead to complications such as root resorption of adjacent teeth and cyst formation, ultimately impacting oral health and facial aesthetics. Traditional treatments, such as surgical intervention combined with orthodontic traction, are widely used. While these methods have achieved some success in improving dental function and aesthetics, precise control of traction force, optimization of treatment time, and protection of periodontal tissues remain major challenges in this field.

[0003] The general procedure for treating impacted maxillary canines currently involves surgery and orthodontic traction. Surgery typically involves exposing the impacted tooth through a window and applying traction using a traction chain / ligature and rubber bands. While this method successfully guides the impacted tooth to its normal dentition position in most cases, precise control of the traction force often relies on the dentist's experience, lacking an effective biomechanical model to guide the transmission of traction force. This leads to unstable force transmission during traction, potentially causing complications such as periodontal tissue damage and root resorption.

[0004] The effectiveness of maxillary canine impaction treatment is influenced by a variety of factors, the most critical of which include the location and angle of the impacted tooth, the patient's age, periodontal health, and the control of traction force. Studies have shown that the spatial location and tilt angle of the impacted tooth directly affect the difficulty and duration of treatment. Younger patients, whose bones are not yet fully developed, tend to have better traction treatment outcomes; while adult patients have harder bones, making traction treatment relatively more challenging. Periodontal health is also a crucial factor affecting treatment outcomes; the thickness of the gingiva and the condition of the alveolar bone determine the periodontal capacity during traction.

[0005] With the development of digital imaging and 3D printing technology, traditional orthodontic treatment methods have undergone a transformation. Preoperative CBCT scans and intraoral scans provide precise three-dimensional tooth position data, offering a personalized design basis for traction treatment. Combined with 3D simulation technology, traction routes and mechanical control can be precisely designed, optimizing the direction, magnitude, and point of application of the traction force, thus avoiding the problems of unstable traction direction and poor treatment results in traditional methods. Furthermore, the introduction of biomechanical models makes force transmission more precise, providing strong support for personalized and accurate treatment. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a buccal impacted canine traction guide plate.

[0007] The buccal impacted canine retraction guide plate provided in this application adopts the following technical solution: A buccal impacted canine traction guide plate includes a fixed end and a traction end. The fixed end has a rectangular structure and is fixed to an orthodontic bracket and archwire on a posterior tooth by a 0.25mm diameter metal ligature wire. The traction end is installed near the impacted tooth side of the fixed end and has a curved arc structure. The traction end is provided with a first traction position and a second traction position. The traction end is connected to a traction point (lingual buckle or traction hook) bonded to the impacted canine by an elastic rubber chain to pull the impacted canine.

[0008] Furthermore, the fixed end and the traction end are 3D printed integrated metal guide plates, the surfaces of the fixed end and the traction end are smooth surfaces, and the inner surface of the fixed end is a fitting surface that matches the morphology of the posterior teeth.

[0009] Furthermore, the fixed end is evenly provided with snap-fit ​​grooves that mate with orthodontic brackets on the posterior teeth, and the middle of the fixed end is provided with an archwire groove for fitting with the orthodontic bracket.

[0010] Furthermore, a first hook is installed on the first traction position of the traction end, and the first hook is located on the side of the traction end near the fixed end.

[0011] Furthermore, a second hook is installed on the traction end of the traction end, and there are multiple second hooks. The second hooks extend into the lingual palatal side of the dental arch.

[0012] Furthermore, the present invention also provides a traction method for a buccal impacted canine traction guide plate, which specifically includes the following steps: S1: Align the existing premolars and molars (such as teeth 14, 15, 16 and 17) in the posterior region in advance, and fix orthodontic brackets on the posterior teeth as traction anchorage; S2: If the deciduous canine is retained, the deciduous canine (such as retained tooth 53) is extracted to create a space for the impacted canine to be placed. (If the space is insufficient, a push spring is used to create and maintain the space for the target tooth to be placed.) S3: Install the fixed end on the posterior teeth and connect the fixed end to the traction anchorage formed by the ligation of the orthodontic bracket in the posterior tooth area through a 0.25mm diameter metal ligation wire, so that the fixed end is firmly fixed on the posterior teeth, while the traction end is placed in the space where the impacted canine is positioned. S4: Attach a lingual buckle or traction hook to the traction point on the impacted canine; S5: The lingual buckle or traction hook on the impacted canine is connected to the first traction position of the traction end via an elastic rubber chain. After the impacted canine is pulled above the impacted canine positioning gap, the lingual buckle or traction hook on the impacted canine is connected to the second traction position of the traction end via an elastic rubber chain until the impacted canine moves to the position of the impacted canine positioning gap, thus completing the traction process of the impacted canine.

[0013] Beneficial effects Compared with the prior art, the present invention provides a buccal impacted canine retraction guide plate, which has the following beneficial effects: 1. In this invention, by designing an arc-shaped traction end with a first traction position (first hook) and a second traction position (multiple second hooks), traction forces of different directions and angles can be provided at different stages of treatment. In the first stage, the first hook is used to move the impacted canine from the impacted position to the target area. In the second stage, multiple second hooks are used to achieve vertical positioning and fine position adjustment of the tooth. This phased and directional adjustable traction mechanism significantly improves the accuracy and controllability of the tooth movement path, helps to shorten the treatment cycle and reduce the risk of root damage.

[0014] 2. In this invention, the fixed end adopts a rectangular structure that fits and is fixed to multiple posterior teeth (such as teeth 14-17). It is ligated to the anchorage on these teeth as a whole through the snap-fit ​​groove, archwire groove and metal ligating wire, which disperses and transmits the traction reaction force to multiple posterior teeth, greatly enhancing the stability of the anchorage. It effectively avoids complications such as "anchorage loss", root resorption or tilting displacement caused by excessive force on a single or a few anchorage teeth in traditional methods, and fundamentally protects healthy adjacent teeth. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of this application.

[0017] Figure 2 This is a schematic diagram of the installation structure of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Fixed end; 11. Snap-fit ​​groove; 12. Bow wire groove; 2. Traction end; 21. First hook; 22. Second hook. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-2 This invention provides a buccal impacted canine traction guide plate, which includes a fixed end 1 and a traction end 2. The fixed end 1 has a rectangular structure and is fixed to the orthodontic bracket and archwire on the posterior teeth by a 0.25mm diameter metal ligature wire. The traction end 2 is installed on the fixed end 1 near the impacted canine and has a curved arc structure. The traction end 2 is provided with a first traction position and a second traction position. The traction end 2 is connected to the traction point (lingual buckle or traction hook) bonded to the impacted canine by an elastic rubber chain to pull the impacted canine.

[0021] In the above technical solution, if the deciduous canine is retained, the patient's deciduous canine is first extracted to create a space for the impacted canine to be positioned (if the space is insufficient, a push spring is used to create and maintain the space for the target tooth to be positioned). Then, the fixed end 1 is fixed to the orthodontic bracket and orthodontic archwire on the posterior teeth with a 0.25mm metal ligature wire so that the fixed end 1 can be closely attached to multiple posterior teeth, so that multiple posterior teeth can form a stable whole with the fixed end 1. The impacted canine is connected to the traction end 2 by an elastic rubber chain. The first traction position on the traction end 2 first tilts and pulls the impacted canine so that the impacted canine can move above the space for the impacted canine. The second traction position can further finely pull the impacted canine in three dimensions so that the impacted canine can move to the ideal position within the space for the impacted canine. Finally, the impacted canine is accurately pulled by orthodontic correction.

[0022] Specifically, the precise position, angle, and distance of the impacted canines are obtained through preoperative CBCT (cone-beam computed tomography) and intraoral digital impression scanning. A traction device is designed in a computer using 3D simulation technology, and the treatment target and traction direction are determined based on the patient's specific condition. The traction distance is calculated based on the 3D simulation results, and the precise position of the traction hook is set to ensure accurate transmission of traction force. The required traction force and the duration of each traction phase are calculated using the distance difference between the target position and the initial position. Different sizes of elastic rubber chains are selected according to different traction forces to achieve precise control of the traction force.

[0023] The fixed end 1 can form a stable whole with multiple posterior teeth, thereby preventing the phenomenon of posterior teeth shifting due to a single tooth as a fulcrum, avoiding mild to moderate resorption of adjacent teeth during traction, thus achieving the goal of protecting adjacent teeth.

[0024] See Figures 1-2 As shown, as a preferred technical solution in this embodiment, the fixed end 1 and the traction end 2 are 3D printed integrated metal guide plates, the surfaces of the fixed end 1 and the traction end 2 are smooth surfaces, and the inner surface of the fixed end 1 is a fitting surface that matches the morphology of the posterior teeth.

[0025] In the above technical solution, the smooth surfaces of the fixed end 1 and the traction end 2 can minimize friction and irritation with soft tissues such as oral mucosa and tongue, reduce the risk of ulceration, and improve the patient's wearing comfort; the inner surface of the fixed end 1 is designed in combination with intraoral scanning and 3D simulation, so that the inner surface of the fixed end 1 can accurately fit with the posterior teeth.

[0026] See Figures 1-2 As shown, as a preferred technical solution of this embodiment, the fixed end 1 is evenly provided with a snap-fit ​​groove 11 that cooperates with the orthodontic bracket on the posterior teeth, and the fixed end 1 is provided with an archwire groove 12 in the middle for fitting with the orthodontic bracket.

[0027] In the above technical solution, the clasp slot 11 facilitates the passage of orthodontic brackets on the posterior teeth, while the archwire slot 12 connects the 0.25mm diameter metal ligature wire to the orthodontic bracket and the fixed end 1, so that the fixed end 1 can be accurately fitted to the posterior teeth.

[0028] See Figures 1-2 As shown, as a preferred technical solution in this embodiment, a first hook 21 is installed on the first traction position of the traction end 2, and the first hook 21 is located on the side of the traction end 2 close to the fixed end 1.

[0029] See Figures 1-2 As shown, as a preferred technical solution of this embodiment, a second hook 22 is installed on the traction end 2, and there are multiple second hooks 22. The second hooks 22 extend into the lingual palatal side of the dental arch.

[0030] In the above technical solution, the first hook 21 is connected to the lingual buckle or traction hook on the impacted canine via an elastic rubber chain. At the start of traction, the elastic rubber chain (short distance) is used to pull, causing the impacted canine to move. The movement of the tooth to the target position is shown by cone-beam CT imaging of the oral cavity. When the impacted canine reaches the target position, the lingual buckle or traction hook on the impacted canine is connected to the second hook 22 via elastic rubber chains of different specifications. Multiple second hooks 22 are provided. In order to avoid the elastic rubber chain compressing and damaging the soft tissue during treatment, resulting in gingival soft tissue defects, the elastic rubber chain can pass through the inside of the first hook 21 to avoid the rubber chain directly compressing the gingiva.

[0031] In conjunction with the above structure, the present invention also provides a traction method for a buccal impacted canine traction guide plate, which specifically includes the following steps: S1: Three-dimensional digital design and preoperative preparation Based on the patient's CBCT and intraoral scan data, three-dimensional reconstruction and simulation were performed using Ex0 dental model software in the computer. Using Leisai's 3D technology, an integrated metal guide plate was designed to precisely match the patient's dental anatomy, and the traction path from the initial position of the impacted canine to the target impacted canine placement space was planned. At the same time, the existing premolars and molars in the posterior region (such as teeth 14, 15, 16 and 17) were pre-aligned, and orthodontic brackets were ligated and fixed on the posterior teeth as traction anchorage to prepare for providing a stable and dispersed anchorage system.

[0032] S2: Create target traction channel If a primary canine is retained, the primary canine (such as retained tooth 53) is extracted to create a space for the impacted canine to be positioned. (If the space is insufficient, a push spring is used to create and maintain the space for the target tooth to be positioned.) A target impacted canine space is created in the dental arch to accommodate and ultimately position the impacted canine, thus opening up a clear physical space for the movement of the tooth.

[0033] S3: Precise positioning and secure fixing of the guide plate The fixed end 1 of the traction frame is fixed to the traction anchorage of the ligation and fixation device on the posterior teeth, so that its inner contact surface is in close contact with the tooth surface. The clasp 11 is aligned with the orthodontic brackets on the posterior teeth one by one. The metal ligature wire is passed through the archwire groove 12 to firmly ligate and fix the fixed end 1 to the orthodontic brackets of multiple posterior teeth, so that it forms an integral rigid anchorage unit with the posterior teeth. At this time, the curved traction end 2 has accurately passed through the space where the impacted canine is placed and extended into the lingual palatal side of the dental arch.

[0034] S4: Establish the point of force application for tooth movement The impacted canine is exposed surgically, and a lingual buckle or traction hook is glued to the traction point on the impacted canine to provide a reliable connection point for subsequent application of traction force.

[0035] S5: Phased, directional, and precise traction First stage (tilting traction): Using an elastic rubber chain that matches the traction design force value, connect the lingual buckle or traction hook on the impacted canine to the first traction position (first hook 21) on the traction end 2. This hook position is close to the fixed end 1, and the force generated mainly causes the impacted canine to tilt and move, thereby gradually pulling it from the impacted buccal position to above the impacted canine placement gap.

[0036] The second stage (vertical traction and final positioning): After the impacted canine is pulled above the impacted canine positioning gap, the elastic rubber chain is replaced and connected to the second traction position (second hook 22) on the traction end 2 of the impacted canine traction point. Multiple second hooks 22 provide different force application points, and the direction of force can be adjusted as needed to achieve precise control of the vertical positioning and final position of the tooth, guiding it to fully enter and position in the impacted canine positioning gap, thus completing the entire traction process.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A buccal impacted canine retraction guide plate, characterized in that, The traction guide plate includes a fixed end (1) and a traction end (2). The fixed end (1) has a rectangular structure and is fixed to the orthodontic bracket and orthodontic archwire on the posterior teeth by a metal ligature wire with a diameter of 0.25 mm. The traction end (2) is installed on the side of the fixed end (1) near the impacted tooth. The traction end (2) has a curved arc structure and is provided with a first traction position and a second traction position. The traction end (2) is connected to the traction point (lingual buckle or traction hook) bonded to the impacted canine by an elastic rubber chain to pull the impacted canine.

2. The buccal impacted canine retraction guide plate according to claim 1, characterized in that: The fixed end (1) and the traction end (2) are 3D printed integrated metal guide plates. The surfaces of the fixed end (1) and the traction end (2) are smooth surfaces, and the inner surface of the fixed end (1) is a mating surface that matches the morphology of the posterior teeth.

3. The buccal impacted canine retraction guide plate according to claim 2, characterized in that: The fixed end (1) is evenly provided with a snap-fit ​​groove (11) that mates with the orthodontic bracket on the posterior teeth, and the fixed end (1) is provided with an archwire groove (12) in the middle for fitting with the orthodontic bracket.

4. A buccal impacted canine retraction guide plate according to claim 3, characterized in that: A first hook (21) is installed on the first traction position of the traction end (2), and the first hook (21) is located on the side of the traction end (2) close to the fixed end (1).

5. A buccal impacted canine retraction guide plate according to claim 4, characterized in that: The traction end (2) is equipped with a second hook (22), and there are multiple second hooks (22). The second hooks (22) extend into the lingual palatal side of the dental arch.

6. A method for traction of a buccal impacted canine guide plate, comprising a buccal impacted canine guide plate as described in any one of claims 1-5, characterized in that, The traction method includes the following steps: S1: Align the existing premolars and molars (such as teeth 14, 15, 16 and 17) in the posterior region in advance, and fix orthodontic brackets on the posterior teeth as traction anchorage; S2: If the deciduous canine is retained, the deciduous canine (such as retained tooth 53) is extracted to create a space for the impacted canine to be placed. S3: Install the fixed end (1) on the posterior teeth and connect the fixed end (1) to the traction anchor formed by the ligation of the orthodontic bracket in the posterior tooth area through a metal ligation wire with a diameter of 0.25mm, so that the fixed end (1) is fastened to the posterior teeth, while the traction end (2) is placed in the space where the impacted canine is positioned. S4: Attach a lingual buckle or traction hook to the traction point on the impacted canine; S5: The traction point (lingual buckle or traction hook) on the impacted canine is connected to the first traction position of the traction end (2) through an elastic rubber chain. After the impacted canine is pulled to the position above the impacted canine gap, the traction point (lingual buckle or traction hook) on the impacted canine is connected to the second traction position of the traction end (2) through an elastic rubber chain until the impacted canine moves to the position of the impacted canine gap, thus completing the traction process of the impacted canine.

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