JP2006167275A - Intermaxillary fixation bracket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intermaxillary fixation bracket which can perform intermaxillary fixation so as to guide right occlusion easily in a short time without requiring a special skill. <P>SOLUTION: The intermaxillary fixation bracket consists of: a bracket body having a mounting surface to teeth; an engaging protrusion combined integrally to the upper surface of the bracket body; and a wire extended from the end of the side face of the bracket body. The engaging protrusion includes: an through hole provided at its proximal end in parallel to the extending direction of the wire; and an engaging part of an intermaxillary traction rubber. Between the through hole and the wire, a one-way clutch with which the wire can be put through the through hole only in the extending direction is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an intermaxillary fixation bracket used for intermaxillary fixation for treatment related to a jawbone, and particularly to an intermaxillary fixation bracket used for simple intermaxillary fixation.

  In the treatment of the trauma of the jawbone, the excision of the jawbone due to the neoplastic disease, etc., reconstruction surgery for tissue regeneration is performed following these treatments. In order for this reconstruction operation to be performed appropriately, it is important to first induce the correct occlusion in the intermaxillary fusion.

  However, there are often times when there is not enough time to perform an appropriate intermaxillary fusion, and sometimes an emergency intermaxillary fusion must be performed. As a method performed in such a case, for example, in Patent Document 1 or Non-Patent Document 1, a plurality of screw pins having hooks at the top are screwed into the alveolar bones of the upper and lower jaws to achieve correct occlusion of the upper and lower jaws. In such a state, a method has been proposed in which intermaxillary fixation is performed by tightly connecting a cable such as stainless steel to the upper and lower screw pins of the jaw. Non-Patent Document 2 proposes a method in which a bracket provided with a hook is attached to the upper surfaces of a plurality of teeth above and below the jaw, and intermaxillary traction rubber is stretched over the hook to fix the jaw.

JP 05-338872 A British Journal of Oral and Maxillofacial Surgery (1999) 37, p115-p116 British Journal of Oral and Maxillofacial Surgery (2001) 39, p301-p303

  However, such a method has a problem that it takes time to screw the screw pin into the alveolar bone and to attach the bracket to the tooth surface, which may impair the original therapeutic operation. Further, such a method has a problem that it cannot be widely used because it requires special skills such as a tooth processing technique and an adhesion technique. Furthermore, there is a problem that the mucous membrane is easily damaged by the wire, or a complicated operation is required.

  Therefore, there is a need for an intermaxillary fixation device that can easily guide correct occlusion in a short time. In particular, in recent years, operations related to the jawbone have been frequently performed in many clinical departments, and thus there has been a strong demand for such an intermaxillary fixation device.

  In view of such conventional problems, the present invention is a simple intermaxillary fixation device that does not require special skills and can perform intermaxillary fixation so that correct occlusion can be easily induced in a short time. An object of the present invention is to provide a suitable intermaxillary fixation bracket.

  An intermaxillary bracket according to the present invention comprises a bracket body having a mounting surface for teeth, a locking projection integrally coupled to the upper surface of the bracket body, and a wire extending from a side end of the bracket body. The locking projection has an insertion hole provided in a base end portion thereof in parallel with the extending direction of the wire, and a locking portion of an intermaxillary traction rubber provided at an upper portion of the insertion hole, A one-way clutch is formed between the insertion hole and the wire so that the wire can be inserted into the insertion hole only in the extending direction.

  In the intermaxillary fixation bracket, the one-way clutch is formed between a convex portion or a concave portion provided on the outer peripheral portion of the wire and a convex portion or a concave portion provided on the inner peripheral portion of the insertion hole, When the wire is to be pushed or pulled out with a predetermined force in the direction of the extending direction, a convex portion or a concave portion provided in the outer peripheral portion of the wire is provided in the inner peripheral portion of the insertion hole. The wire can be fed by being elastically deformed so as to get over the convex portion or the concave portion, and after the wire is inserted into the insertion hole, the wire is pushed into the insertion hole in the direction opposite to the extending direction or When the wire is to be pulled out, the convex portion or concave portion provided on the outer peripheral portion of the wire is engaged with the convex portion or concave portion provided on the inner peripheral portion of the insertion hole so that feeding of the wire is prevented. Formed It can be configured sea urchin.

  Further, in the above-described intermaxillary fixation bracket, it is preferable that the locking projection is formed by inserting an insertion hole forming member that forms a wire and a one-way clutch into the base end portion, and the bracket body is different. It should be colored by size. Moreover, two locking projections can be provided on the bracket body.

  The intermaxillary fixation bracket according to the present invention does not require any special skill and can perform intermaxillary fixation so that correct occlusion can be performed easily in a short time. In addition, it can be used safely, and the intermaxillary fixation bracket can be easily removed from the patient in an emergency and after chin reconstruction.

  An embodiment of an intermaxillary fixation bracket according to the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of an intermaxillary fixation bracket. As shown in FIG. 1, the intermaxillary fixation bracket 10 includes a bracket main body 11, a locking protrusion 15 integrally coupled to the upper surface of the bracket main body 11, and a wire 20 extending from a side end of the bracket main body 11. Become.

  The bracket body 11 of the present example is flat and has a size that fits within the tooth surface, and has elasticity that can be deformed so as to be in close contact with the tooth surface, and has a shape and elasticity that can be easily attached to the tooth surface. As a result, each bracket body 11 can be attached to a required tooth surface in order to guide correct occlusion. The bracket body 12 is made of a material that can be easily sterilized and disinfected and can be safely placed in the oral cavity. For example, a resin such as polyurethane, polypropylene, polyethylene, or polycarbonate can be used as the material of the bracket body 11.

  The locking projection 15 has a mushroom shape in which the base end portion 151 is integrally coupled to the upper surface of the bracket body 11, and has a locking portion 153 on the upper portion of the base end portion 151. The locking projection 15 may be formed from a member different from the bracket body 11, and may be integrally coupled to the bracket body 11 by a bonding method such as adhesion, or may be integrally formed with the bracket body 11 from the beginning. It may be molded.

  An insertion hole 154 is provided in the base end portion 151 of the locking projection 15 in parallel with the extending direction of the wire 20, and a claw-shaped projection 155 is formed on the inner peripheral surface of the insertion hole 154. In this example, eight convex portions 155 are provided. As will be described below, this convex portion 155 forms a so-called one-way clutch between the convex portion 21 provided on the outer peripheral portion of the wire 20.

  The locking portion 153 is composed of a small-diameter portion following the base end portion 151 and a large-diameter portion at the top, and has a shape in which the intermaxillary traction rubber is easily locked and is not easily detached. Further, the top of the locking portion 153 has a spherical shape, so that damage to the oral cavity of the patient wearing the intermaxillary fixation bracket is prevented and the discomfort is eased.

  As shown in FIG. 1, the wire 20 extends from the side surface end of the bracket body 11. As the wire 20, a known steel wire, a thin wire made of titanium or a titanium alloy can be used. For example, a steel wire having a wire diameter of 0.5 mm may be used and one end thereof may be embedded in a resin-made bracket body 11. Further, the wire 20 has a length that is slightly surpassed by one round of the teeth.

  Further, as shown in FIG. 2, the wire 20 has a plurality of claw-shaped convex portions 21 on the outer peripheral portion thereof. Such a convex portion 21 can be formed by a processing method such as rolling or forging. As will be described below, the convex portion 21 constitutes a one-way clutch with the convex portion 155 of the insertion hole 154, so a plurality of convex portions 21 may be provided at the tip of the wire 20 to the extent that the function is satisfied. It is not necessary to provide the entire length of the wire 20. The range and the number of the convex portions 21 provided on the wire 20 are determined by the relationship between the length of the insertion hole 154 and the convex portions 155 provided on the inner peripheral surface thereof.

  The intermaxillary fixation bracket 10 is attached to a tooth 40 as shown in FIGS. 3 and 4 to perform intermaxillary fixation. That is, as shown in FIG. 3, the bracket body 11 of the intermaxillary fixation bracket 10 is arranged so as to be within the plane of the predetermined tooth 40, and the rear insertion hole 154 is wound around the tooth 40 through the gap of the tooth 40. In contrast, the wire is inserted in the extending direction of the wire. Next, the tip portion 23 of the wire 20 drawn out from the insertion hole 154 is drawn with pliers or the like, and the teeth are tightened so that there is no looseness.

  Further, as shown in FIG. 4, a plurality of intermaxillary fixation brackets 10 are attached to the required teeth 40A and 40B of the upper jaw and the lower jaw as 10A and 10B, respectively. Finally, the intermaxillary traction rubber 30 is stretched between the locking portions 153 of the locking projections 15 of the intermaxillary fixation brackets 10A and 10B to fix the jaws.

  In the above operation, when the wire 20 is to be pushed or pulled out with a predetermined force in the direction of the extension direction with respect to the insertion hole 154, the convex portion 21 or the concave portion 22 provided on the outer peripheral portion of the wire 20 is inserted. The wire 20 can be fed by being elastically deformed so as to get over the convex portion 155 or the concave portion 156 provided in the inner peripheral portion of the hole 154. On the other hand, after the wire 20 is inserted into the insertion hole 154, when the wire 154 is pushed into or pulled out of the insertion hole 154 in the direction opposite to its extending direction, the outer periphery of the wire 20 is The provided convex portion 21 or concave portion 22 and the convex portion 155 or concave portion 156 provided on the inner peripheral portion of the insertion hole 154 mesh with each other, and the feeding of the wire 20 is prevented. That is, a one-way clutch is formed in which the wire 20 can be inserted into the insertion hole 154 only in the wire extending direction. As a result, the intermaxillary fixation bracket 10 can be fastened on the surface of the tooth 40. Note that the pushing or pulling force when the wire 20 is inserted through the insertion hole 154 is good enough for a doctor or the like to easily pull it with pliers or the like. Further, when the tip portion 25 of the wire 20 is long enough to impair safety, it is preferable to cut the wire 20.

  By such an intermaxillary fixation method, intermaxillary fixation between the upper jaw and the lower jaw can be performed so that correct occlusion can be induced easily and in a short time. In order to induce correct occlusion, large teeth should be able to be loaded with a large pulling force. For this reason, the intermaxillary fixation bracket 10 is preferably sized according to the size of the teeth 40. For example, it is preferable to classify into a molar, premolar, canine or anterior tooth. Moreover, it is preferable to color-code the sized ones so that they can be easily distinguished.

  The intermaxillary fixation bracket 10 and the intermaxillary fixation method using the same have been described above. However, the present invention is not limited to the above embodiments. For example, the above-described one-way clutch is formed between the convex portion 21 provided on the outer peripheral portion of the tip of the wire 20 and the concave portion 156 provided on the inner peripheral portion of the insertion hole 154 shown in FIG. Can do.

  Moreover, between the convex part 155 provided in the inner peripheral part of the insertion hole 154, and the some recessed part 22 provided in the front-end | tip outer peripheral part of the wire 20 shown to Fig.6 (a), or FIG.6 (b) A one-way clutch can be formed between the wire 20 shown in FIG.

  Further, in the function of the one-way clutch, the elastic characteristics of the convex portion 155 or the concave portion 156 provided on the inner peripheral portion of the insertion hole 154 are important. For this reason, as shown in FIG. 7, the insertion hole 154 that forms the one-way clutch with the wire 20 is provided so that the elastic characteristics of the convex portion 155 or the concave portion 156 provided in the inner peripheral portion of the insertion hole can be selected relatively freely. It is preferable to form the locking projection 15 by embedding the insertion hole forming member A in the proximal end portion 151 of the locking projection.

  Furthermore, for example, the hole diameter of the insertion hole 154 is made slightly smaller than the maximum diameter of the wire 20, and a groove 157 connected from the top of the locking projection 15 to the insertion hole 154 is provided as shown in FIG. Can do. In this case, it is possible to prevent the wire 20 from loosening by applying a compressive force to the wire 20 inserted through the insertion hole 154 from the locking projection 15 portion.

  In addition, two locking projections 15 can be provided on the bracket body 11. In this case, the intermaxillary fixation bracket 10 can be arranged so that the locking projection 15 is between the teeth 40, which can reduce the discomfort experienced when the patient wears the intermaxillary fixation bracket 10. it can.

It is a partial sectional view showing an intermaxillary fixation bracket according to the present invention. FIG. 2 is an enlarged partial cross-sectional view of a wire portion in FIG. 1. It is explanatory drawing of the procedure which binds an intermaxillary fixation bracket to a tooth | gear. It is explanatory drawing of the procedure which performs intermaxillary fixation using an intermaxillary fixation bracket. It is sectional drawing which shows the other Example of the structure of the insertion hole part provided in the latching protrusion. The end shape of the wire is a partial cross-sectional view (a) in the case of having a plurality of recesses, and a front view (b) in the case of a continuous bead shape. It is sectional drawing of the Example in the case of forming an insertion hole by an insertion hole structural member. It is a partial cross section figure which shows the Example in case a latching protrusion part has another structure.

Explanation of symbols

10, 10A, 10B Intermaxillary bracket
11 Bracket body
15 Locking protrusion
151 Base end
153 Locking part
154 insertion hole
155 Convex
156 recess
157 groove
20 wires
21 Convex
22 recess
25 Tip
30 Intermaxillary traction rubber
40, 40A, 40B teeth

Claims (5)

A bracket body having a mounting surface for teeth, a locking protrusion integrally coupled to the upper surface of the bracket body, and a wire extending from a side end of the bracket body,
The locking projection has an insertion hole provided in a base end portion thereof in parallel with the extending direction of the wire, and a locking portion of an intermaxillary traction rubber provided at an upper portion of the insertion hole,
An intermaxillary fixation bracket in which a one-way clutch is formed between the insertion hole and the wire so that the wire can be inserted into the insertion hole only in the extending direction. The one-way clutch is formed between a convex portion or a concave portion provided on the outer peripheral portion of the wire and a convex portion or a concave portion provided on the inner peripheral portion of the insertion hole,
When the wire is to be pushed or pulled out with a predetermined force in the direction of the extension direction with respect to the insertion hole, the convex portion or the concave portion provided on the outer peripheral portion of the wire is the inner periphery of the insertion hole. It is possible to feed the wire by elastically deforming so as to get over the convex part or concave part provided in the part,
After the wire has been inserted into the insertion hole, when the wire is to be pushed into or pulled out of the insertion hole in the direction opposite to its extending direction, a convex portion provided on the outer periphery of the wire or 2. The intermaxillary fixation bracket according to claim 1, wherein the concave portion and a convex portion or a concave portion provided on an inner peripheral portion of the insertion hole are engaged with each other to prevent the wire from being fed.   4. The intermaxillary fixation bracket according to claim 1, wherein the locking projection is formed by inserting an insertion hole forming member that forms a wire and a one-way clutch at a base end portion thereof.   The bracket body according to any one of claims 1 to 3, wherein the bracket body is colored for each different size.   5. The intermaxillary fixation bracket according to any one of claims 1 to 4, wherein the bracket body is provided with two locking projections.

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