Cast bracketed embedded tooth retractor

Abstract

The utility model discloses a cast support formula embedded impacted tooth tractor, including support main part, tongue side buckle and traction rope, support main part and the tooth surface adhesion of anchorage tooth, and the tooth crown surface adhesion of tongue side buckle and impacted tooth, and the traction rope connects support main part and tongue side buckle, support main part includes a plurality of traction arm and fixed clasp, and sets up the traction column for fixing traction rope on the traction arm, and fixed clasp is connected with support main part, and fixed clasp buckle is in the tooth crown appearance high point line under the inverted recess area of anchorage tooth, advantage: the traction column for fixing traction rope is equipped on the traction arm, and a plurality of traction arms cooperate different specifications's traction rope, can satisfy the traction work of impacted tooth correction treatment whole process, to the situation of having a plurality of impacted teeth, can utilize different traction column and carry out traction work simultaneously, improve correction efficiency, and fixed clasp further plays the role of reinforcing after the adhesion of support main part.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic technology, specifically to a cast framework type impacted tooth traction device. Background Technology

[0002] Normal tooth eruption is a prerequisite for tooth function. Due to various reasons, some permanent teeth fail to erupt at the appropriate time, forming impacted teeth, which is a common clinical problem in the field of orthodontics. Permanent teeth usually erupt when the root has developed to half to three-quarters of its length. If they fail to erupt in time, clinical intervention is often required.

[0003] Chinese Patent Publication No. CN214104680U discloses a 3D-printed impacted tooth traction device for use with invisible orthodontic appliances. The device includes a left bonding base plate, a right bonding base plate, a left fixed arm, a right fixed arm, and a traction hook. The traction hook comprises a horizontal rod and a vertical rod. The left fixed arm is fixed to the left bonding base plate, and the right fixed arm is fixed to the right bonding base plate. One end of the horizontal rod is detachably connected to the left fixed arm, and the other end is detachably connected to the right fixed arm. One end of the vertical rod is connected to the horizontal rod, and the other end is a connecting end. After bonding, this device eliminates the need for clinicians to temporarily trim the invisible orthodontic appliance or bond other attachments to the tooth surface to form impacted tooth traction components. The 3D-printed bonding base plate offers high stability, reducing the cost and time of repeated bonding. Patient comfort is improved, which also contributes to better cooperation and ensures treatment efficiency. The movable connection between the fixed arm and the traction hook allows for early traction while widening the gap, saving treatment time. However, the above device has the following drawbacks in use: 1. The device is fixed inside the patient's mouth by adhesive through a small adhesive surface. The fixation method is simple and the stability is poor, and the risk of the device falling off accidentally is relatively high. 2. The traction hooks in the device need to be replaced during treatment according to the traction growth of the impacted tooth. The operation is too cumbersome, and the disassembly and installation process will affect the stability of the device's bonding and fixation. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing devices have a single, unstable fixing method, and require replacement of related structures, making operation cumbersome and affecting the stability of the device. To address this problem, a cast-frame type impacted tooth traction device is proposed, comprising a frame body, a lingual buckle, and a traction rope. The frame body is bonded to the surface of the impacted tooth, the lingual buckle is bonded to the crown surface of the impacted tooth, and the traction rope connects the frame body and the lingual buckle. The frame body includes multiple traction arms and a fixing ring. The traction arms are mounted on the frame body, and traction posts for fixing the traction rope are provided on the traction arms. The fixing ring is connected to the frame body and engages with the undercut area below the highest point of the crown of the impacted tooth.

[0005] The technical solution of this utility model, by setting a traction arm with a traction column for fixing the traction rope, can meet the traction work throughout the entire process of impacted tooth orthodontic treatment. Only different specifications of traction rope need to be replaced, making the operation simple and convenient. For cases with multiple impacted teeth, different traction columns can be used for traction work at the same time, and multi-directional simultaneous adjustment can be achieved, improving orthodontic efficiency. By setting a fixing clasp structure, after the main body of the bracket is glued, it further strengthens the bracket, improves the stability of the device after fixation, and reduces the risk of accidental dislodgement.

[0006] In a preferred embodiment of the present invention, the main body of the support is arc-shaped and made of cobalt-chromium alloy. The main body of the support is designed according to the morphology of the patient's dentition and covers the entire or part of the dentition. Cobalt-chromium alloy has excellent biocompatibility.

[0007] In a preferred embodiment of the present invention, the traction arm includes a connecting part and an outer body, the connecting part and the outer body are an integral structure, the connecting part of the traction arm extends beyond the surface of the anchoring tooth, the outer body of the traction arm is opposite to the crown surface of the anchoring tooth, and the traction arm provides a fulcrum to fix the traction rope.

[0008] In a preferred embodiment of the present invention, the connecting part of the traction arm is located between the crowns of two adjacent anchor teeth, and the traction arm will not affect the normal occlusion of the teeth.

[0009] In a preferred embodiment of the present invention, the outer body of the traction arm is provided with multiple traction columns. The horizontal height and distance between the traction columns and the lingual buckle are different. Multiple traction columns can provide multiple fulcrums to facilitate traction of impacted teeth. By varying the horizontal height of the traction columns, the traction angle of the traction rope can be changed to meet personalized multi-angle treatment needs.

[0010] In a preferred embodiment of the present invention, the traction arm is opposite to the occlusal surface of the impacted tooth crown, and the traction arm provides a fulcrum to fix the traction rope.

[0011] In a preferred embodiment of the present invention, the traction arm is provided with a traction column, which is located in the vertical direction of the tongue-side buckle, and the traction column performs traction work on the impacted tooth from the vertical direction.

[0012] In a preferred embodiment of the present invention, the traction column and the traction arm are an integral structure. The outer end of the traction column is hemispherical, and a groove is provided on the side wall of the traction column. The outer end of the traction column is smooth and will not cause damage to the oral cavity. The groove can limit the traction rope and prevent the traction rope from detaching from the traction column.

[0013] In a preferred embodiment of the present invention, the fixing ring is connected to the support body via a base resin, and the fixing ring is used to further enhance fixation, making the device more stable.

[0014] In a preferred embodiment of the present invention, the fixing clasp extends beyond the surface of the anchoring tooth and fits against the crown surface of the anchoring tooth, and the fixing clasp will not affect the normal occlusal function of the tooth.

[0015] The advantages of this utility model compared with the prior art are: The technical solution of this utility model, by setting a traction arm with a traction column for fixing the traction rope, can meet the traction work throughout the entire process of impacted tooth orthodontic treatment. Only different specifications of traction rope need to be replaced, making the operation simple and convenient. For cases with multiple impacted teeth, different traction columns can be used for traction work at the same time, and multi-directional simultaneous adjustment can be achieved, improving orthodontic efficiency. By setting a fixing clasp structure, after the main body of the bracket is glued, it further strengthens the bracket, improves the stability of the device after fixation, and reduces the risk of accidental dislodgement. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram of the main body of a cast-frame type impacted tooth retraction device; Figure 2 Front view schematic diagram for use in a cast-frame type impacted tooth retraction device; Figure 3 A three-dimensional schematic diagram of the traction column of a cast bracket-type impacted tooth retraction device; The components are: 1-bracket body, 2-traction arm, 3-traction column, 4-groove, 5-fixing ring, 6-base resin, 7-tongue buckle, and 8-traction rope. Detailed Implementation

[0017] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3 The technical solutions in the embodiments of this utility model will be described in detail below. Example 1

[0018] like Figure 1-3 As shown, this utility model is a cast bracket type impacted tooth traction device, including a bracket body 1, a lingual buckle 7, and a traction rope 8.

[0019] The tongue-side buckle 7 and the traction rope 8 are existing products, and their usage methods are conventional techniques known to those skilled in the art.

[0020] like Figure 2As shown in the figure, the dotted line represents the impacted tooth, and the remaining teeth are anchorage teeth. The lingual buckle 7 is bonded to the crown surface of the impacted tooth. Specifically, a special resin adhesive can be used. When the impacted tooth is not exposed, a surgical incision is required to provide a bonding position for the lingual buckle 7; if the impacted tooth is partially exposed, no surgical incision is required.

[0021] In this embodiment, the traction rope 8 is a traction rubber band. During operation, the support body 1 is bonded and fixed to the tooth surface of the anchored tooth, and the traction rope 8 is simultaneously connected to the support body 1 and the lingual buckle 7. The impacted tooth is pulled by the traction rope 8 to realize the treatment process.

[0022] The main body of the framework 1 is made of biocompatible metal, specifically cobalt-chromium alloy. The main body of the framework 1 needs to be checked by an articulator. The articulator is an existing product. The main body of the framework 1 should not interfere with the normal forward and lateral movement of the patient's teeth to ensure normal occlusal function.

[0023] The main body of the framework 1 is arch-shaped and designed according to the morphology of the patient's upper and lower teeth. Specifically: First, the patient's dental data is collected using a 3D intraoral scanning system to obtain an accurate 3D model. Based on the location and number of impacted teeth, a personalized framework body 1 is designed. The framework body 1 needs to continuously perform traction to complete the entire treatment process for the patient. Next, a wax model is made using casting wax, and the lost-wax casting technique is used to complete the production of the support body 1. The finished support body 1 needs to undergo corresponding processing, including grinding and electrolytic polishing, to improve the surface finish.

[0024] Finally, the main body 1 of the support is bonded to the surface of the patient's anchorage tooth. In clinical practice, resin cement can be used as the adhesive.

[0025] In addition to adhesive bonding, the main body 1 of the bracket is further reinforced by multiple retaining rings 5 ​​to improve the stability of the bracket body 1.

[0026] The retaining clasp 5 is ring-shaped and made of the same material as the support body 1. The retaining clasp 5 is connected to the support body 1 through the base resin 6. The base resin 6 can self-cur and is cured through free radical polymerization reaction to fix the retaining clasp 5. The base resin 6 is a common dental restorative material.

[0027] The retaining clasp 5 is connected to the support body 1, so one end of it is located on the tooth surface of the anchorage tooth, and the other end of the retaining clasp 5 crosses the tooth surface of the anchorage tooth and fits against the crown surface of the anchorage tooth.

[0028] At this time, the fixing clasp 5 is precisely engaged with a tooth inside the upper and lower dentition, and uses the natural undercut area 0.5mm above the gingiva of the crown, that is, the undercut area below the high point of the crown shape, to retain it in place, thereby achieving secondary reinforcement of the framework body 1.

[0029] Since the fixed clasp 5 extends beyond the surface of the anchoring tooth and fits against the crown surface of the anchoring tooth, a portion of the fixed clasp 5 will be located on the occlusal surface of the crown of the anchoring tooth. This portion of the fixed clasp 5 will engage the tooth and be located in the gap between two adjacent teeth. Therefore, the fixed clasp 5 will not affect normal occlusal function.

[0030] The locking position of the retaining clasp 5 should avoid impacted teeth to prevent interference and affect normal traction.

[0031] The support body 1 also includes multiple traction arms 2. The traction arms 2 are integral with the support body 1, and there are two types of traction arms 2.

[0032] In one type, the traction arm 2 extends beyond the surface of the anchoring tooth and faces the crown surface of the anchoring tooth. This type of traction arm 2 includes a connecting part and an outer body. The connecting part and the outer body are an integral structure. The connecting part extends beyond the surface of the anchoring tooth and faces the occlusal surface of the crown of the anchoring tooth, while the outer body faces the crown surface of the anchoring tooth.

[0033] Traction arm 2 does not adhere to the soft tissue, but is suspended in the air to avoid wear and damage to the soft tissue.

[0034] The connection of the traction arm 2 is located between the crowns of two adjacent teeth of the anchoring tooth, so it will not affect the normal occlusal function. Furthermore, this type of traction arm 2 needs to avoid the position of the impacted tooth and is usually located on both sides of the impacted tooth.

[0035] Multiple traction columns 3 protrude from the outer body of the traction arm 2. The traction columns 3 are used to connect with the traction rope 8. The traction columns 3 and the tongue buckle 7 are on the same plane. However, the horizontal height and distance of the traction columns 3 are different. Therefore, when the traction rope 8 connects the traction columns 3 and the tongue buckle 7, the traction angle of the traction rope 8 when it is working is different, so as to meet the personalized multi-angle treatment needs.

[0036] Furthermore, the traction arm 2 has multiple traction columns 3, which can perform traction at multiple points. Especially when there are a large number of impacted teeth, one traction arm 2 can pull multiple impacted teeth at the same time, which can greatly reduce the number of traction arms 2 and thus reduce the space occupied in the oral cavity.

[0037] As treatment progresses, simply changing the traction rope to size 8 (i.e., altering the inner diameter of the traction rubber band) allows for continuous traction throughout the entire treatment process. Adjustments to the angle and traction force can be made simultaneously or sequentially, depending on the specific clinical instructions.

[0038] Considering manufacturing costs, the number of traction columns 3 needs to be sufficient to meet the needs of patients. The reason is that excess traction columns 3 can be removed by grinding, but if the number is insufficient, they must be remade, which greatly increases costs and causes waste.

[0039] Another type has a traction arm 2 that faces the occlusal surface of the impacted tooth crown, meaning the traction arm 2 is located in the vertical direction of the impacted tooth. This type of traction arm 2 has only one traction post 3, and the traction post 3 is located in the vertical direction of the lingual buckle 7. Therefore, this type of traction arm 2 can only perform vertical traction work on one impacted tooth at a time.

[0040] The two types of traction arms 2 can complement each other in operation to meet the traction needs of patients with impacted teeth in different directions. For example, if an impacted tooth needs to be pulled outward first and then pulled vertically downward, it must be achieved by the cooperation of the two types of traction arms 2. The traction direction of the impacted tooth can be determined by CT. When making the main body of the bracket 1, the different types of traction arms 2 and the specific number of traction columns 4 are designed according to the guidance of CT, so as to meet the needs of traction in different directions during treatment.

[0041] The traction arm 2 is a protruding block, and the outer end of the traction column 3 is hemispherical with a smooth surface, which is not likely to cause damage to the oral cavity. The side wall of the traction column 3 is concave to form a groove 4. The groove 4 matches the traction rope 8, which can limit the traction rope 8 and prevent the traction rope from falling off.

[0042] The method of using the cast-frame type impacted tooth retraction device in this embodiment is as follows: A customized framework body 1 is made according to the patient's dentition and bonded to the surface of the patient's supporting teeth. It is then further reinforced with retaining clasps 5 to improve stability. Next, a lingual clip 7 is bonded to the crown surface of each impacted tooth. After all clips are bonded, the lingual clips 7 are connected to different traction posts 3 via traction ropes 8, according to the traction direction of each impacted tooth, to achieve multi-angle personalized traction. As treatment progresses and the impacted teeth are gradually corrected, different sizes of traction ropes 8 need to be replaced to ensure that the traction ropes 8 maintain tension on the impacted teeth and prevent traction failure.

[0043] The above embodiments are only for illustrating the technical concept of this utility model and should not be used to limit the protection scope of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the protection scope of this utility model.

Claims

1. A cast-frame type impacted tooth traction device, comprising a frame body (1), a lingual buckle (7), and a traction rope (8), wherein the frame body (1) is bonded to the surface of the anchor tooth, the lingual buckle (7) is bonded to the crown surface of the impacted tooth, and the traction rope (8) connects the frame body (1) and the lingual buckle (7), characterized in that: The support body (1) includes multiple traction arms (2) and a fixing ring (5). The traction arms (2) are set on the support body (1), and the traction arms (2) are provided with traction columns (3) for fixing the traction rope (8). The fixing ring (5) is connected to the support body (1), and the fixing ring (5) is snapped into the undercut area below the high point of the crown of the anchor tooth.

2. The cast bracket type impacted tooth retraction device according to claim 1, characterized in that: The main body of the support (1) is bow-shaped and is made of cobalt-chromium alloy.

3. The cast bracket type impacted tooth retraction device according to claim 1, characterized in that: The traction arm (2) includes a connecting part and an outer body. The connecting part and the outer body are an integral structure. The connecting part of the traction arm (2) extends beyond the tooth surface of the anchoring tooth, and the outer body of the traction arm (2) is opposite to the crown surface of the anchoring tooth.

4. The cast bracket type impacted tooth traction device according to claim 3, characterized in that: The connecting part of the traction arm (2) is located between the crowns of two adjacent anchor teeth.

5. The cast bracket type impacted tooth retraction device according to claim 3, characterized in that: The outer body of the traction arm (2) is provided with multiple traction columns (3), and there are differences in the horizontal height and distance between the traction columns (3) and the tongue buckle (7).

6. The cast bracket type impacted tooth retraction device according to claim 1, characterized in that: The traction arm (2) is opposite to the occlusal surface of the impacted tooth crown.

7. The cast bracket type impacted tooth retraction device according to claim 6, characterized in that: The traction arm (2) is provided with a traction column (3), which is located in the vertical direction of the tongue buckle (7).

8. The cast bracket type impacted tooth retraction device according to claim 1, characterized in that: The traction column (3) and the traction arm (2) are an integral structure. The outer end of the traction column (3) is hemispherical, and the side wall of the traction column (3) has a groove (4).

9. The cast bracket type impacted tooth retraction device according to claim 1, characterized in that: The fixing ring (5) is connected to the bracket body (1) through the base resin (6).

10. The cast bracket type impacted tooth retraction device according to claim 8, characterized in that: The fixing clasp (5) extends beyond the surface of the anchoring tooth and fits against the crown surface of the anchoring tooth.

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