Traction hook with changeable traction height

Abstract

The traction hook with the changeable traction height comprises a clamping seat, a supporting rod and a hook, a connecting portion suitable for being fixedly connected with a straight wire arch is arranged on the clamping seat, one end of the supporting rod is fixedly connected with the clamping seat, the other end of the supporting rod is fixedly connected with the hook, and a plurality of hanging bolts are arranged on the surface of the supporting rod at intervals. The hook or any one of the plurality of hanging bolts is suitable for being connected with the micro-implant in a hanging manner through the existing elastic piece. According to the application, the hooks or the hanging bolts at different height positions are respectively connected with the micro-implant in a hanging manner through the elastic pieces, and then the traction height of the traction hook is changed to realize orthodontic correction, so that the time of arranging a plurality of traction hooks with different heights on a straight wire arch by a doctor is saved, the treatment cost of a patient is also reduced, and the treatment efficiency of the patient is improved. The orthodontic correction device is very suitable for clinical orthodontic correction of protrudent facial forms.

Description

Technical Field

[0001] This utility model relates to the field of oral medical device technology, specifically to a traction hook with adjustable traction height. Background Technology

[0002] Currently, for patients with prominent facial features, the routine procedure involves extracting four premolars and retracting the anterior teeth to improve facial convexity. The combination of anchorage screws and straight wire arch technology is a highly effective approach in modern orthodontic treatment.

[0003] The mechanical mechanisms of orthodontic tooth movement include the center of resistance and the center of rotation, specifically:

[0004] Impedance Center: In free space, the impedance center of an object is its center of mass; in a gravitational field, it is its center of gravity. When a force acts on an object, the impedance center surrounding that object, constraining its motion, is called the impedance center. A tooth with its root located in the jawbone is like a stake driven into the ground; the location of its impedance center depends on the height of the alveolar ridge crest and the length of the root. The impedance center of a normal tooth is roughly located at the midpoint of the root within the alveolar bone, slightly off-center from the alveolar ridge crest, approximately one-third of the distance from the alveolar ridge crest to the root apex. When the root shortens, the impedance center shifts coronally; when the alveolar bone is absorbed, the impedance center shifts apically. During orthodontic treatment, the impedance center of the tooth is not constant.

[0005] Center of rotation: The point around which an object rotates under the action of an external force is called the center of rotation. By controlling the magnitude and direction of the force and torque, the center of rotation of a tooth can be located at any desired point, achieving different types of tooth movement. During orthodontic treatment, for a tooth at a certain stage, if its alveolar bone height and root length do not change significantly, the center of resistance of that tooth can be considered constant, while the center of rotation changes with the point of force application.

[0006] Clinically, any type of tooth movement can be achieved through a combination of simple translation and simple rotation. Translation: When the line of force passes through the center of resistance of the tooth, the tooth undergoes translation. Rotation: When a couple acts on the tooth in the opposite direction at corresponding equidistant points centered on the center of resistance, the tooth rotates; in this case, the center of rotation is at the center of resistance.

[0007] In modern orthodontics, the use of micro-implant anchorage screws (fixed within the alveolar bone) combined with straight wire archwires has proven to be an effective method for tooth repositioning. In extraction cases, controlling the inclination angle of the maxillary anterior teeth plays a crucial role in establishing functional stability and aesthetics on the affected side. Among the factors controlling anterior tooth inclination, the vertical height of the micro-implant and the length of the traction hook on the archwire are the most important. The vertical height of the micro-implant and the length of the traction hook on the archwire significantly influence the labial inclination of the maxillary anterior teeth.

[0008] The mechanical mechanism of anterior tooth retraction using the placement of micro-implant anchorage screws and long traction hooks: The impedance center of a single-rooted tooth is generally located at 2 / 3 of the root length. Su Jiehua et al. found that the impedance center of six standard-sized upper anterior teeth was vertically upward, approximately 14 mm above the incisal edge of the central incisor. Pedersen et al.'s research showed that the impedance center of the incisal unit was approximately 6.5 mm from the bracket's edge and approximately 19 mm posterior to the bracket. Zhang Yi et al., using a three-dimensional finite element model of the maxilla, found that when retracting upper anterior teeth using the implant anchorage sliding method, the impedance center of the upper anterior teeth was located 5.1 mm from the alveolar ridge crest. When the horizontal traction force is below this height, the upper anterior teeth rotate clockwise; when the horizontal traction force is above this height, the upper anterior teeth rotate counterclockwise. When the horizontal traction force passes through the impedance center, the upper anterior teeth move as a whole. Therefore, in clinical practice, the direction of the traction force needs to be adjusted according to individual factors such as the labial inclination of the anterior teeth and the height of the alveolar bone when retracting anterior teeth.

[0009] In many cases, to achieve better aesthetic results, it's desirable for orthodontic forces to pass precisely through the impedance center of the upper anterior teeth, or for the resistance line to pass above or below the impedance center. However, determining the impedance center of multiple anterior teeth is very difficult. For clinicians, a rough judgment can be made based on factors such as the height of the alveolar bone, root morphology, and tooth angles. Then, the anterior tooth movement can be altered by changing the height of the traction hooks and the micro-implant. Because changing the position and direction of the micro-implant implant within the jawbone can cause significant discomfort to the patient, multiple traction hooks of different heights are often placed on the straight wire arch during clinical treatment, each connected to the micro-implant via elastic elements to achieve orthodontic correction. This not only increases the time spent by the dentist in setting multiple traction hooks of different heights on the straight wire arch but also increases the patient's treatment costs. Utility Model Content

[0010] In the clinical treatment of patients with prominent facial features, the change in position and direction of micro-implants implanted into the jawbone can cause great discomfort. Therefore, multiple traction hooks of different heights are often set on the straight wire arch and connected to the micro-implant through elastic elements to achieve orthodontic treatment. This not only increases the time for doctors to set multiple traction hooks of different heights on the straight wire arch, but also increases the treatment cost for patients. This invention provides a traction hook with adjustable traction height.

[0011] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0012] A traction hook with adjustable traction height includes a mounting base, a support rod, and a hook. The mounting base is provided with a connecting part suitable for fixed connection with a straight wire bow. One end of the support rod is fixedly connected to the mounting base, and the other end of the support rod is fixedly connected to the hook. A plurality of latches are spaced apart on the surface of the support rod. The hook or any one of the latches is suitable for being hooked to a micro-implant via an existing elastic element.

[0013] Compared with existing technologies, the adjustable traction hook provided by this invention, when used, first fixes the traction hook to the straight wire arch via the connecting part on the holder. Then, using existing methods, a rough judgment is made based on the height of the alveolar supporting bone, the morphology of the roots, and the angle of the teeth. The hook is then connected to the micro-implant via an elastic element to change the movement of the anterior teeth. As the anterior teeth move inward, the center of gravity of the teeth's resistance and the center of rotation will change. Subsequently, one of several hooks is sequentially connected to the micro-implant via an elastic element to change the movement of the anterior teeth, thereby improving the patient's facial convexity and completing orthodontic treatment for patients with prominent facial features. Therefore, this application can use hooks or hooks at different heights to connect to the micro-implant via elastic elements, thereby changing the traction height of the traction hook to achieve orthodontic treatment. This not only saves doctors the time of setting multiple traction hooks of different heights on the straight wire arch but also reduces the patient's treatment costs, making it very suitable for clinical use in orthodontic treatment of patients with prominent facial features.

[0014] Furthermore, the connecting part is a slot opened on the card holder.

[0015] Furthermore, the opening of the slot is oriented in the same direction as the extension direction of the plurality of latches.

[0016] Furthermore, the support rod surface is provided with three latches at intervals, with a spacing of 0.45-0.55mm between adjacent latches.

[0017] Furthermore, the cross-section of the latch is an inverted convex structure, and the lower end of the inverted convex structure is fixedly connected to the surface of the support rod. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the traction hook structure with adjustable traction height provided by this utility model.

[0019] In the diagram, 1 is the card holder; 11 is the connecting part; 2 is the support rod; 3 is the hook; and 4 is the hanging bolt. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please refer to Figure 1 As shown, this utility model provides a traction hook with adjustable traction height, including a base 1, a support rod 2, and a hook 3. The base 1 is provided with a connecting part 11 suitable for fixed connection with a straight wire. The straight wire is placed in an existing orthodontic bracket bonded to the patient's teeth. One end of the support rod 2 is fixedly connected to the base 1, and the other end of the support rod 2 is fixedly connected to the hook 3. A plurality of latches 4 are spaced apart on the surface of the support rod 2. Any one of the hooks 3 or latches 4 is suitable for being hooked to a micro-implant through an existing elastic element such as a rubber chain. That is, the micro-implant can be hooked to the hooks 3 or latches 4 at different heights on the traction hook through an elastic element, thereby changing the traction height of the traction hook to achieve orthodontic treatment.

[0024] Compared with existing technologies, the adjustable traction hook provided by this invention, when used, first fixes the traction hook to the straight wire arch via the connecting part on the holder. Then, using existing methods, a rough judgment is made based on the height of the alveolar supporting bone, the morphology of the roots, and the angle of the teeth. The hook is then connected to the micro-implant via an elastic element to change the movement of the anterior teeth. As the anterior teeth move inward, the center of gravity of the teeth's resistance and the center of rotation will change. Subsequently, one of several hooks is sequentially connected to the micro-implant via an elastic element to change the movement of the anterior teeth, thereby improving the patient's facial convexity and completing orthodontic treatment for patients with prominent facial features. Therefore, this application can use hooks or hooks at different heights to connect to the micro-implant via elastic elements, thereby changing the traction height of the traction hook to achieve orthodontic treatment. This not only saves doctors the time of setting multiple traction hooks of different heights on the straight wire arch but also reduces the patient's treatment costs, making it very suitable for clinical use in orthodontic treatment of patients with prominent facial features.

[0025] For a specific embodiment, please refer to Figure 1 As shown, the connecting part 11 is a slot formed on the card holder 1, thereby engaging the slot with the straight wire bow and achieving a fixed connection between the card holder 1 and the straight wire bow. Of course, those skilled in the art can also create a through hole on the card holder 1 to engage with the straight wire bow, based on the aforementioned slot structure.

[0026] For a specific embodiment, please refer to Figure 1 As shown, the opening of the slot is aligned with the extension direction of the plurality of latches 4. Thus, when the clasp 1 is fixedly connected to the straight wire arch via the slot, the plurality of latches 4 all face one side of the tooth. After the latches 4 are attached to the micro-implant via the elastic element, the elastic element is not easy to fall off the latches 4, thus improving the reliability of clinical use.

[0027] For a specific embodiment, please refer to Figure 1 As shown, the support rod 2 has three hanging bolts 4 spaced apart on its surface, with a spacing of 0.45-0.55mm between adjacent hanging bolts 4. These three hanging bolts 4, together with the hooks 3, can form four traction points at different heights, which can well meet the clinical orthodontic treatment needs of changes in the center of gravity and rotation of the teeth caused by the movement and retraction of the anterior teeth.

[0028] For a specific embodiment, please refer to Figure 1 As shown, the cross-section of the latch 4 is an inverted convex structure. The lower end of the inverted convex structure is fixedly connected to the surface of the support rod 2. Thus, when one end of the elastic element is hooked onto the inverted convex structure, the upper end of the inverted convex structure can prevent the elastic element from falling off the latch 4, thereby ensuring a reliable connection between the latch 4 and the micro-implant.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A towing hook with adjustable towing height, characterized in that, It includes a card holder (1), a support rod (2) and a hook (3). The card holder (1) is provided with a connecting part (11) suitable for fixed connection with a straight wire bow. One end of the support rod (2) is fixedly connected to the card holder (1), and the other end of the support rod (2) is fixedly connected to the hook (3). Several hooks (4) are provided at intervals on the surface of the support rod (2). Any one of the hooks (3) or several hooks (4) is suitable for being hooked to the micro implant through existing elastic elements.

2. The towing hook with adjustable towing height according to claim 1, characterized in that, The connecting part (11) is a card slot opened on the card holder.

3. The towing hook with adjustable towing height according to claim 2, characterized in that, The opening of the slot is aligned with the extension direction of the plurality of latches (4).

4. The traction hook with adjustable traction height according to claim 1, characterized in that, The support rod (2) has three hanging bolts (4) spaced apart on its surface, with a spacing of 0.45-0.55 mm between adjacent hanging bolts (4).

5. The traction hook with adjustable traction height according to claim 1, characterized in that, The cross-section of the latch (4) is an inverted convex structure, and the lower end of the inverted convex structure is fixedly connected to the surface of the support rod (2).

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