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Anti-rotating type intramedullary nail

An intramedullary nail, the same technology, applied in the direction of internal fixator, internal bone synthesis, fixer, etc., can solve the problems of affecting bone regeneration position, bone malunion, poor torsional strength, etc., and achieve excellent rotation resistance, Effect of reducing stress concentration and ingenious structure

Inactive Publication Date: 2018-11-09
CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the torsional strength of the existing intramedullary nails is not good, and the distal end of the existing intramedullary nails is linear, and the position is far behind, resulting in stress concentration. There are clinical feedbacks that there is displacement or rotation of the intramedullary nail , such conditions can affect the position of bone regeneration, resulting in bone malunion

Method used

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  • Anti-rotating type intramedullary nail
  • Anti-rotating type intramedullary nail
  • Anti-rotating type intramedullary nail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] See Figure 1 to Figure 3 , the anti-rotation intramedullary nail of this embodiment includes a connecting part 1 and a main body 2 .

[0036] The connecting part 1 and the main body 2 are integrated, and the connecting part 1 is located at one end of the main body 2 . The end of the main body 2 away from the connection part 1 is provided with a set of distal holes. The distal hole group of the main body 2 includes an interlocking anti-rotation hole 2-1 and a positioning hole 2-2. There are two interlocking anti-rotation holes 2-1. The central axis of the two interlocking anti-rotation holes 2 - 1 and the central axis of the positioning hole 2 - 2 both intersect the central axis of the main body 2 . See Figure 6 , the two interlocking anti-rotation holes 2-1 are arranged as intersections on the projection of the side view.

[0037] The positioning hole 2-2 of the distal hole group of the main body 2 is located between the two interlocking anti-rotation holes 2-1, ...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, the difference is:

[0045] See Figure 4 and Figure 5 , The connection part 1 is provided with two reconstruction holes 1-3 arranged side by side. The central axes of the two reconstruction holes 1-3 are on the same vertical plane as the central axis of the connection part 1, and the included angles between the central axes of the two reconstruction holes 1-3 and the central axis of the connection part 1 are both 50° ~60°, preferably 55°.

[0046] During operation, place the whole body in the bone marrow, drive into the bone marrow from the outside of the bone through multiple screws, respectively screw with the two interlocking anti-rotation holes 2-1 of the main body 2, drive into the bone marrow from outside the bone through multiple screws and It is inserted into the positioning hole 2-2 of the main body 2 and the two reconstruction holes 1-3 of the connection part 1, and screwed with the bone.

Embodiment 3

[0048]This embodiment is basically the same as Embodiment 1, the difference is:

[0049] In order to be able to locate the overall distal end, the positioning holes 2-2 of the distal hole group of the main body 2 are waist-shaped holes.

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Abstract

The invention discloses an anti-rotating type intramedullary nail. The anti-rotating type intramedullary nail comprises a connecting part and a main body, wherein the connecting part and the main bodyare integrated, and the connecting part is located at one end of the main body; a far-end hole group is arranged at one end, away from the connecting part, of the main body; the far-end hole group ofthe main body comprises two interlocking anti-rotating holes and a positioning hole; central axes of the two interlocking anti-rotating holes and a central axis of the positioning hole intersect witha central axis of the main body; projections of the two interlocking anti-rotating holes are crossed on a lateral view. The anti-rotating type intramedullary nail is ingenious in structure and suitable for bone remodeling, the projections of the two interlocking anti-rotating holes are crossed on the lateral view, the anti-rotating property is excellent, and overall rotation can be limited betterunder cooperation of screws and the interlocking anti-rotating holes.

Description

technical field [0001] The invention relates to an anti-rotation intramedullary nail. Background technique [0002] There are usually two ways to deal with long bone fractures: external fixed healing and internal fixed healing. Internal fixed healing is to implant an intramedullary nail in the bone marrow cavity, and then drive screws outside the bone to fix the bone and bone at the fracture site. The intramedullary nail compresses the broken surface of the bone, regenerates the bone and shortens the healing time. At present, the torsional strength of the existing intramedullary nails is not good, and the distal end of the existing intramedullary nails is linear, and the position is far behind, resulting in stress concentration, and there are clinical feedbacks that there is displacement or rotation of the intramedullary nail , such conditions can affect the position of bone regeneration, resulting in bone malunion. Therefore, it is necessary to design an anti-rotation int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72
CPCA61B17/72
Inventor 胡晓文危杰周锦韦冬王江南马飞杨文龙
Owner CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD