CN202235720U - A rotatable orthodontic bracket - Google Patents

Abstract

The utility model discloses a rotatable orthodontic bracket for oral cavity, which belongs to the technical field of orthodontic appliances. The bracket comprises a bracket body with four working wings, the working wings are separated from each other at intervals to form a groove, the bottom of the bracket body is arranged on a base through a rotary adjusting device, and a locking device used for fixing the position of the rotary adjusting device after rotation is arranged on the base. The utility model provides a rotatable orthodontic bracket in oral cavity can be through the power and the moment on the accurate control different grade type embedding tooth of rotation regulation device to realize the individuation of upper jaw embedding cusp and rescue, and need not to demolish and rescues the ware and reassemble, easy and simple to handle, can shorten traction time in the at utmost, improve and rescue efficiency, reduce patient's misery, consequently the utility model discloses good application prospect has.

Description

A rotatable orthodontic bracket

technical field

The utility model relates to a bracket in an orthodontic appliance, in particular to a rotatable oral orthodontic bracket capable of adjusting the direction of a groove, and belongs to the technical field of dental orthodontic appliances. the

Background technique

In recent years, the combined orthodontic-surgery approach has become the most commonly used technique for the treatment of maxillary impacted canines. The key to its success is accurate positioning of the fenestration and proper orthodontic distraction. the

Existing studies have shown that when the orthodontic force is evenly distributed on the periodontal ligament, that is, when the periodontal ligament receives relatively average pressure or tension, the response to the orthodontic force is the best, and the orthodontic effect is the best. According to the previous research results of nonlinear finite element analysis (Zhang Jun, Wang Xuxia, Ma Shiliang et al. Three-dimensional finite element analysis of periodontal stress distribution of impacted teeth. West China Journal of Stomatology, 2008,26(1):19-22), Under the same force value, the periodontal ligament response is different when the angle formed by the traction force direction and the tooth long axis of the maxillary impacted canine is different. With the increase of the angle, the maximum value of the periodontal ligament stress increases, but the stress distribution is also different. It is more concentrated, especially the stress concentration at the root tip is also more obvious. The impacted teeth are teeth embedded in the jawbone. The force on the impacted teeth must pass through the periodontal ligament to make them erupt. The average stress on the periodontal ligament is more conducive to the traction of the impacted teeth. Therefore, in clinical orthodontics, the design of the traction scheme for maxillary impacted canines should try to avoid the angle between the direction of the orthodontic force and the long axis of the impacted teeth being too large. Be careful not to injure adjacent teeth. the

In addition, with the eruption and movement of the impacted teeth, the direction of the long axis of the teeth is also constantly changing, which requires that the direction of the orthodontic force can also be changed accordingly, that is, the design of the appliance must be able to meet the requirements of the change in the direction of the orthodontic force. And because the range of the oral cavity is narrow, in order to alleviate the pain of the patient, the adjustment of the orthodontic force should be convenient for clinical operation. the

Utility model content

Aiming at the structure of the existing orthodontic traction and fixed appliances for the impacted teeth, the purpose of this utility model is to provide a bracket for the individualized appliance of the maxillary impacted canines, the bracket can change the direction of the groove according to the clinical needs , so that the augmented arch wire can be easily inserted into the groove, and the traction force consistent with the long axis direction of the impacted teeth can be applied. the

The technical scheme that the utility model solves its technical problem adopts is:

A rotatable orthodontic bracket, comprising a bracket body with four working wings, the working wings are separated from each other to form grooves, the bottom of the bracket body is set on the base through a rotating adjustment device, the base A locking device for fixing the rotated position of the rotary adjustment device is arranged on the top.

The rotation adjustment device of the rotatable orthodontic bracket includes a large gear. the

The number of teeth of the bull gear is set at 24 stages, and each stage rotates 15°. the

The locking device includes a pinion, which directly engages with the bull gear; a locking lever is arranged at the axis of the pinion. the

The brackets are stainless steel brackets. the

Compared with the prior art, the utility model has the following characteristics:

The utility model optimizes and improves the structure of the existing orthodontic traction fixed appliances for the buried teeth, and the proposed rotatable orthodontic brackets can precisely control the force and moment on different types of buried teeth through the adjustment device, so as to realize maxillary Individualized orthodontic treatment of embedded canines without dismantling and reassembling the appliance. The rotary bracket of the utility model is suitable for the traction correction of maxillary impacted canines of different biomechanical types, is easy to operate, can shorten the traction time to the greatest extent, improve the treatment efficiency, and reduce the pain of patients, so it has a good application prospect.

The design of the rotatable orthodontic bracket of the present utility model is better than Faber et al. (Faber J, Berto PM, Quaresma M. Rapid prototyping as a tool for diagnosis and treatment planning for maxillary canine impact. Am J Orthod Dentofacial Orthop, 2006, 129(4):583-589) proposed a rapid prototyping-based personalized fixed appliance for impacted teeth, which is simpler, smaller and more flexible. Modern precision machining technology can completely manufacture rotatable orthodontic brackets that meet clinical application requirements according to this design. the

Description of drawings

Fig. 1 is the front view of the utility model rotatable orthodontic bracket semi-sectional view;

Fig. 2 is the side view of the utility model rotatable orthodontic bracket semi-sectional view;

Fig. 3 is a schematic diagram of an embodiment of the rotatable orthodontic bracket of the present invention.

In the figure: 1, tank body; 2, working wing; 3, small gear; 4, large gear; 5, base; 6, locking rod; 7, embedding teeth. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail. the

The structural design of the bracket of the utility model is completed by using the "mechanical design" function module of CATIA V5 software. The bracket is divided into two layers: a bracket body 1 and a base 5 . Four working wings 2 are arranged on the bracket body 1, and the working wings 2 are separated from each other to form grooves. The bracket body 1 and the base 5 are connected by rotation, and the base 5 is glued to the surface of the crown of the embedded tooth 7 with an enamel adhesive as shown in FIG. 3 . The bracket body 1 can rotate around the base 5 . the

The rotation connection between the bracket body 1 and the base 5 adopts micro-gear transmission, that is, a large gear 4 is installed in the base body, and the large gear 4 is fixedly connected with the bottom of the bracket body 1, and the bracket body can be adjusted by rotating the gear. 1; the base body is also provided with a pinion 3, the pinion 3 directly meshes with the bull gear 4, and a locking lever 6 is provided at the axis of the pinion 3 to lock the rotation of the bull gear 4. the

Before the bracket is clinically bonded, pull up the locking lever 6, rotate the bracket body 1, and the large gear 4 drives the small gear 3 to rotate; after the traction angle is determined, press the locking lever 6, the pinion 3 and the large gear 4 Engage and lock, and the bracket body 1 will be locked. As the position of the embedded teeth changes, when the traction angle needs to be adjusted, the locking lever 6 can be opened to directly adjust the groove direction of the bracket body 1, thereby changing the angle between the direction of the traction force and the long axis of the embedded teeth. the

Parameters such as the size of the gear and the number of rotation stages can be designed according to the structure of the bracket. The gear 4 used in this embodiment has a total of 24 teeth, each stage rotates 15°, and the adjustable angle range of the bracket groove covers 360°. The specific structure of the pinion 3 can be designed according to the meshing degree with the bull gear 4. the

The bracket of the utility model is made of the same material as the traditional bracket, and can be made of traditional medical stainless steel. The utility model separates the bracket body and the base part of the bracket, and adds a simple mechanical device in the middle to realize the angle adjustment of the bracket. The small size of the rotating device will not increase the difficulty of clinical operation and cause discomfort to patients. After the rotatable orthodontic bracket is bonded, if there is a deviation between the long axis of the bracket and the long axis of the tooth or the direction of the original force needs to be changed due to the continuous change of the long axis direction of the tooth during the traction process of the impacted teeth, you only need to Rotate the bracket body of the bracket until it reaches the required direction and then lock it, without removing the appliance for reassembly. The adjustable device of the bracket and the augmented arch wire can realize the control of force and moment on different types of impacted teeth, and realize individualized correction of maxillary impacted canines. the

Claims (5)

1. rotary type orthodontic bracket; Comprise supporter groove (1) with four work wings (2); Each interval is separated the formation groove between the work wing (2); It is characterized in that: said supporter groove (1) bottom is arranged on the pedestal (5) through rotation adjustment device, is provided for the fixedly locking device of position, rotation adjustment device rotation back on the pedestal (5).

2. the described rotary type orthodontic bracket of claim 1, it is characterized in that: said rotation adjustment device comprises gear wheel (4).

3. the described rotary type orthodontic bracket of claim 2, it is characterized in that: the number of teeth of said gear wheel (4) is established 24 grades altogether, and every grade is rotated 15 °.

4. the described rotary type orthodontic bracket of claim 1, it is characterized in that: said locking device comprises pinion, pinion (3) directly meshes with gear wheel (4); The place, axle center of said pinion is provided with securing rod (6).

5. claim 1,2,3 or 4 described rotary type orthodontic brackets is characterized in that: said bracket is the rustless steel bracket.

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