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A built-in arc stretcher

A stretcher and built-in technology, applied in the field of medical devices, can solve the problems of breakage of the traction rope, easy metal fatigue, etc., and achieve the effect of practical operation and easy operation.

Active Publication Date: 2017-03-08
THE 306TH HOSPITAL OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this design also has disadvantages. For example, stainless steel wire is used as the traction rope, although it has sufficient strength, but the metal is prone to fatigue. In the later stage of traction, as the traction resistance gradually increases, the traction rope may break

Method used

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  • A built-in arc stretcher
  • A built-in arc stretcher
  • A built-in arc stretcher

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 1-4 As shown, the present invention is specifically described. A built-in arc retractor provided by the present invention includes a fixing plate 6 provided with a second through hole 5, and an arc guide rail is fixedly connected to one side of the fixing plate 6. 2. An arc groove 12 is provided at the center of the arc-shaped guide rail 2, and a connecting plate 11 capable of axial rotation is provided on the fixed plate 6. The connecting plate 11 is provided with a hole for cooperating with the screw rod 1, One end of the screw rod 1 is connected with the universal joint 10 provided with the handle 7, and the screw rod 1 is flexibly connected with the threaded hole provided on the slider 9, and the slider 9 is arranged in the arc groove 12 A sliding guide post 13, the guide post 13 is fixed on the bone plate 3 provided with the first through hole 4, the bone plate 3 is I-shaped, and the guide post 13 is arranged on the I-shaped bone plate 3. At the ce...

Embodiment 2

[0027] The difference between this embodiment 2 and embodiment 1 is that, as figure 1 As shown, the curved guide rail 2 is connected to the fixed plate 6 to form an integral structure. In this embodiment, the arc of the curved guide rail 2 is 75°. According to the specific requirements of traction, the arc of the curved guide rail 2 is preferably 60°. Or 90°, the second through hole 5 on the fixing plate 6 is used for fixing the fixing plate 6 and the bone surface through screws, and the arc guide rail 2 is used to constrain the arc movement track of the distractor. The connecting plate 11 is connected with the fixed plate 6, rotates around the bolt 8 connected to them, and advances the screw rod 1, one end of the screw rod 1 is connected with the connecting plate 11, and the universal joint 10 connected thereto is rotated. to drive. The other end of the screw 1 is a threaded rod, which is threadedly connected with the slider 9 on the bone plate 3 , and the screw 1 is rotated...

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Abstract

The invention relates to the technical field of a medical appliance, in particular to an internal arced distractor. The internal arced distractor provided by the invention comprises a fixed plate, wherein the fixed plate is provided with a second through hole; one side of the fixed plate is fixedly connected with an arc guide rail; an arc groove is formed in the center of the arc guide rail; a connecting plate capable of rotating axially is arranged on the fixed plate; a hole matched with a threaded rod to use is formed in the connecting plate; one end of the threaded rod is connected with a universal joint; the universal joint is provided with a handle; the threaded rod is movably connected with a threaded hole formed in a sliding block; the sliding block is provided with a guide pillar sliding in the arc groove; the guide pillar is fixedly mounted on a bone fracture plate, and a first through hole is formed in the bone fracture plate. The internal arced distractor provided by the invention is applied to arced distraction osteogenesis of a jaw bone, can correct the arc jaw bone deformity and repair arc bone defects of the jaw bone, and is a simple-to-use and practical repair medical appliance for the arced distraction osteogenesis.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a built-in arc stretcher. Background technique [0002] In the prior art, due to the application of distraction osteogenesis technology, the repair and reconstruction of many maxillofacial bone deformities and jaw defects that are difficult to correct by conventional surgical techniques have been solved. However, the vast majority of distraction techniques currently used in clinical practice use linear traction to repair simple linear bone defects such as the body and ascending ramus of the mandible. However, many parts of the maxillofacial bone are connected in a curved manner, and it is difficult for the linear distractor to receive ideal results in these parts, especially the mandibular chin and the mandibular angle region where the curvature is more obvious. [0003] The arc-shaped distractor can complete the tasks that the straight-line distractor cannot accomplish,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/56
CPCA61B17/56A61B2017/564A61B2017/565A61B2017/568
Inventor 周丽斌徐冰血吴玮
Owner THE 306TH HOSPITAL OF PLA
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