CN210673422U

CN210673422U - Assembling jaw bone tractor

Info

Publication number: CN210673422U
Application number: CN201920800842.3U
Authority: CN
Inventors: 崔颖秋; 闫俊中
Original assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd
Current assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-06-05
Anticipated expiration: 2029-05-30

Abstract

A loading-unloading jaw bone tractor comprises a rotating handle, a cross block at the front end of the rotating handle is connected with a single fork through a long pin and a short pin, the single fork is connected with a traction screw, the traction screw is in threaded connection with a threaded cylindrical part of a movable wing, the traction screw penetrates into a traction body, the inner wall of the traction body is in contact with the outer cylindrical surface of the threaded cylindrical part of the movable wing, the traction body is connected with a fixed wing, the traction screw and the traction body are pre-positioned, the rotating handle is rotated in the forward direction to enable the traction screw to be connected with an internal thread of the movable wing, the rotating handle is rotated continuously to enable the traction body to be positioned, and finally a screw is screwed in. Rotatory turning handle can realize drawing the ossification, can easily install the tractor and draw the ossification, need not change its whole in the art when using the tractor of other structures according to particular case needs moreover, only needs to change suitable spare part, can reduce tractor use cost, can obviously reduce and draw operation treatment expense.

Description

Assembling jaw bone tractor

Technical Field

The utility model belongs to the technical field of oral cavity maxillofacial surgery apparatus, concretely relates to loading and unloading formula jaw tractor.

Background

The distraction osteogenesis technology is to slowly draw the bone through a special built-in traction device after the bone is cut, so that new bone is formed in the osteotomy gap to achieve the purpose of bone extension. Both the molding technique and the distraction osteogenesis technique are most commonly applied to the extension of the mandible and the treatment of alveolar bone and mandible defects caused by various reasons.

Aiming at the problems that patients with insufficient bone mass and soft bone, especially severe Pirochan small jaw infant patients, cannot firstly punch, tap and fix the tractor by titanium nails, and under the condition that the relation between the tractor and the bone cutting line is definite, the tractor is fixed by self-tapping titanium nails after the bone is cut, the position of the tractor is easy to change, the jaw bone is accidentally fractured, the condyloid bone is excessively rotated and the like, so that the treatment effect is influenced.

Due to inexperience of the surgeon or other reasons, having discovered that the retractor is not selected to match the patient's facet after surgical installation requires replacement of the retractor with other structures, which may be costly due to the need to replace the entire retractor.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a detachable jaw tractor, which ensures that the installation of the tractor after bone cutting is more convenient and reliable, and avoids the condition of jaw bone fracture and splitting in the installation process of the tractor. Replaceable retractor components are required to reduce costs. The requirement is convenient for assembly and disassembly, and the structure is simple and flexible. The device is applied to the surgical treatment of maxillofacial mandibular deformity, can perform distraction osteogenesis on the lower jaw body part or the lifting support part, and is suitable for alveolar osteogenesis and plastic fracture easy to accidentally split and fracture.

In order to realize the purpose, the utility model discloses a technical scheme is:

the utility model provides a loading and unloading formula jaw tractor, includes the turning handle, and the cross piece of turning handle front end passes through long round pin and short round pin connection list fork, and the list fork is connected and is drawn a screw rod, draws a screw rod threaded connection movable wing screw thread cylinder part, and it is internal that the screw rod that draws a deepens a body, draws a body inner wall contact movable wing screw thread cylinder part outer cylinder face, draws a body connection stationary vane.

The stretching body is connected with the fixed wing through a screw.

The utility model has the advantages that:

use loading and unloading formula jaw tractor in the operation, just carry out the accuracy with fixed wing and activity wing and fix before cutting the bone, avoided bringing the inconvenient phenomenon of tractor installation because the screw skew that leads to cuts the bone, install the screw rod again after cutting the bone, lead the body part and adjust, can easily install the tractor and pull into the bone, and when needing the tractor of using other structures according to particular case in the art, need not be to its whole change, only need change suitable spare part, can reduce tractor use cost, can obviously reduce and pull operation treatment expense.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the fixed wing of the present invention, wherein a is a front view and b is a left view;

fig. 3 is a schematic structural view of the movable wing of the present invention, wherein a is a front view and b is a left view;

fig. 4 is a schematic view of the structure of the fixed wing screw of the present invention.

Wherein. 1 is a rotating handle; 2 is a cross block; 3 is a long pin; 4 is a short pin; 5 is a single fork; 6 is a stretching body; 7 is a movable wing; 8 is a tension screw; 9 is a fixed wing; and 10 is a screw.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1, 2, 3 and 4, the detachable jaw bone tractor comprises a rotating handle 1 and is characterized in that a cross block 2 at the front end of the rotating handle 1 is connected with a single fork 5 through a long pin 3 and a short pin 4, the single fork 5 is connected with a tension screw 8, the tension screw 8 is in threaded connection with a threaded cylindrical part of a movable wing 7, the tension screw 8 extends into a tension body 6, the inner wall of the tension body 6 is in contact with the outer cylindrical surface of the threaded cylindrical part of the movable wing 7, and the tension body 6 is connected with a fixed wing 9.

The stretching body 6 is connected with the fixed wing 9 through a screw 10.

The utility model discloses a screw connection structure of stationary vane and pull slider and tractor lead screw most advanced self-guiding interface structure for the tractor has the function of loading and unloading in the art. Referring to fig. 1, 2 and 3, the embodiment is divided into the following 4 steps:

1. mounting a retractor: before osteotomy, the mounting position and direction of the jaw bone tractor are confirmed, and the tractor is correctly placed and mounted.

2. Disassembling the tension screw and the tension body: the screw 10 is disassembled, the rotating handle 1 is rotated reversely to enable the movable wing 7 to be separated from the stretching screw 8, then the stretching screw 8 and the stretching body 6 are disassembled together, and only the fixed wing 9 and the movable wing 7 are remained.

3. Cutting bones: and (5) cutting bones according to the designed bone cutting line.

4. Reinstallation of the tension screw and the tension body: the stretching screw 8 and the stretching body 6 are pre-positioned, the rotating handle 1 is rotated in the forward direction to enable the stretching screw 8 to be connected with the internal thread of the movable fixed wing 7, the rotating handle 1 is rotated continuously to enable the stretching body to be positioned, and finally the screw 10 is screwed in. The distraction osteogenesis can be realized by rotating the rotating handle 1.

In the operation process, if the shape and the direction of the movable wing or the fixed wing are not suitable, or the length of the stretching body is not suitable for the actual traction range, the local replacement can be carried out at any time.

Claims

1. The utility model provides a loading and unloading formula jaw tractor, includes turning handle (1), its characterized in that, cross piece (2) of turning handle (1) front end are through long round pin (3) and short round pin (4) connection list fork (5), list fork (5) are connected and are drawn a screw rod (8), draw a screw rod (8) threaded connection activity wing (7) screw thread cylinder portion, draw a screw rod (8) and go deep into and draw in a body (6), draw in a body (6) inner wall contact activity wing (7) screw thread cylinder portion outer cylindrical surface, draw and fixed wing (9) are connected in body (6).

2. A removable jaw bone distractor according to claim 1, characterised in that the distractor body (6) is attached to the fixed wings (9) by screws (10).