CN219089735U

CN219089735U - Be applied to stretch ware of tiny bone

Info

Publication number: CN219089735U
Application number: CN202220639316.5U
Authority: CN
Inventors: 田磊; 严峻中
Original assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd; Air Force Medical University of PLA
Current assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd; Air Force Medical University of PLA
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2023-05-30
Anticipated expiration: 2032-03-23

Abstract

One end of the shell penetrates through the screw rod, and the other end of the shell is plugged by a plug with a bearing; the rotating end of the screw rod is positioned outside the shell, and a section of unthreaded thread at the other end is inserted into the inner ring of the plug with the bearing; the rotating end of the shell, which is close to the screw rod, is welded with a fixing lug; the middle part of the shell is provided with a section of hollow groove; the movable lug is welded with a nut, the nut is connected with a screw rod through threads, and the movable lug moves in the hollow groove; the through holes of the fixed lugs and the movable lugs are matched with screws B, and the screws B penetrate through the through holes of the fixed lugs and the movable lugs to connect with screws A; during implementation, the long screw of the screw A is fixed on two sides of a bone fracture of a mouse young animal, the screw B penetrates through the through holes of the fixed ear and the movable ear to be connected with the screw A, fixing is completed, the rotating end of the screw is twisted at intervals according to experimental data, the screw rotates to drive the movable ear to move in a direction away from the fixed ear, the movable ear moves for a certain position every time by rotating for a certain angle, and the purpose of micro bone stretching is achieved.

Description

Be applied to stretch ware of tiny bone

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a distractor applied to tiny bones.

Background

The distraction osteogenesis (Distraction Osteogenesis, DO) is achieved by using a special traction device after osteotomy, and slowly pulling to form new bone in the osteotomy gap, thereby achieving the purpose of bone extension. The stretching and osteogenesis technology is most commonly applied to the extension of mandible and the treatment of small jaw deformity caused by various reasons. Traction osteogenesis has undergone a lengthy development from animal experimental research to clinical application, from bone traction extension of the limb to traction extension of the maxillofacial bone, from external traction devices to internal traction devices, from coarse to fine. The existing stretch-draw device also takes a similar young animal of a murine as an experimental target in the animal experimental process, so that the existing stretch-draw device cannot meet the aim of the young animal experiment.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide the stretcher applied to the tiny bones, overcomes the defects of the traditional stretcher, is applied to animal experimental targets with equal volumes or smaller than mice, has good application value and is convenient to operate.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a distractor applied to tiny bones, which comprises a shell (1), and is characterized in that one end of the shell (1) passes through a screw (3), and the other end is blocked by a blocking plug (4) with a bearing; the rotating end (2) of the screw (3) is positioned outside the shell (1), and a section of unthreaded at the other end is inserted into an inner ring of the plug (4) with the bearing; a fixed lug (5) is welded at the position of the shell (1) close to the rotating end (2) of the screw (3); the middle part of the shell (1) is provided with a section of hollow groove (8); the movable lug (6) is welded with a nut (7), the nut (7) is connected with the screw rod (3) in a threaded manner, and the movable lug (6) moves in the hollow groove (8); the through holes of the fixed lugs (5) and the movable lugs (6) are matched with screws B (13), and the screws B (13) penetrate through the through holes of the fixed lugs (5) and the movable lugs (6) to connect screws A (9).

One end of the screw A (9) is a long screw (12), a counter bore (10) is arranged at one end of the screw head, the counter bore (10) is provided with internal threads, and a cross groove or a straight groove (11) is formed at the top of the screw head.

The internal thread of the screw A (9) is matched with the thread of the screw B (13).

The length of the hollowed-out groove (8) is the movable travel of the movable lug (6).

The beneficial effects of the utility model are as follows:

the device is applied to the animal targets with the equal volume of mice, is convenient to fix, is convenient to detach and install due to the double-thread structure, and is simple to operate.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the screw 9 according to the present utility model.

Fig. 3 is a schematic view of the structure of the screw 13 according to the present utility model.

Fig. 4 is a combination diagram of the present utility model.

Wherein 1 is a shell; 2 is a rotating end; 3 is a screw; 4 is a plug with a bearing; 5 is a fixed ear; 6 is a movable ear; 7 is a nut; 8 is a hollow groove; 9 is a screw A;10 is a counter bore; 11 is a cross groove or a straight groove; 12 is a long screw; 13 is a screw B.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, a distractor applied to tiny bones comprises a shell (1), and is characterized in that one end of the shell (1) passes through a screw (3), and the other end is blocked by a blocking piece (4) with a bearing; the rotating end (2) of the screw (3) is positioned outside the shell (1), and a section of unthreaded at the other end is inserted into an inner ring of the plug (4) with the bearing; a fixed lug (5) is welded at the position of the shell (1) close to the rotating end (2) of the screw (3); the middle part of the shell (1) is provided with a section of hollow groove (8); the movable lug (6) is welded with a nut (7), the nut (7) is connected with the screw rod (3) in a threaded manner, and the movable lug (6) moves in the hollow groove (8); the through holes of the fixed lugs (5) and the movable lugs (6) are matched with screws B (13), and the screws B (13) penetrate through the through holes of the fixed lugs (5) and the movable lugs (6) to connect screws A (9).

The working principle of the utility model is as follows:

during implementation, screws A (9) are fixed on two sides of a bone fracture of a small rat animal, long screws (12) of the screws A (9) are fixed on bones, screws B (13) penetrate through holes of the fixed lugs (5) to be connected with the screws A (9), screws B (13) penetrate through holes of the movable lugs (6) to be connected with the screws A (9), fixation is completed, at intervals, the rotating end (2) of the screw (3) is twisted according to experimental data, the screw (3) rotates to drive the movable lugs (6) to move in a direction far away from the fixed lugs (5), each time the movable lugs (6) rotate for a certain angle, and each time the movable lugs (6) move for a certain position to achieve the purpose of micro bone stretching.

Claims

1. A distractor applied to tiny bones, which comprises a shell (1), and is characterized in that one end of the shell (1) passes through a screw (3), and the other end is blocked by a blocking plug (4) with a bearing; the rotating end (2) of the screw (3) is positioned outside the shell (1), and a section of unthreaded at the other end is inserted into an inner ring of the plug (4) with the bearing; a fixed lug (5) is welded at the position of the shell (1) close to the rotating end (2) of the screw (3); the middle part of the shell (1) is provided with a section of hollow groove (8); the movable lug (6) is welded with a nut (7), the nut (7) is connected with the screw rod (3) in a threaded manner, and the movable lug (6) moves in the hollow groove (8); the through holes of the fixed lugs (5) and the movable lugs (6) are matched with screws B (13), and the screws B (13) penetrate through the through holes of the fixed lugs (5) and the movable lugs (6) to connect screws A (9).

2. The tension device for the micro bones according to claim 1, wherein one end of the screw a (9) is a long screw (12), one end screw head is provided with a counter bore (10), the counter bore (10) is provided with an internal thread, and a cross groove or a straight groove (11) at the top of the screw head.

3. A distractor for use with small bones as in claim 1 wherein the internal threads of screw a (9) mate with the threads of screw B (13).

4. The retractor for micro bones according to claim 1, wherein the length of the hollow groove (8) is the moving stroke of the moving ear (6).