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Medical internal fixator for posterior cruciate ligament lower dead center avulsion fracture

A technology of cruciate ligament and internal fixator, which is applied in the field of medical devices, achieves the effect of avoiding strength reduction, realizing fracture reduction, firm and effective fixation, and realizing minimally invasive surgery

Inactive Publication Date: 2022-07-05
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems, the present invention provides a medical internal fixator for avulsion fractures at the lower insertion point of the posterior cruciate ligament, so as to realize fracture reduction, firm and effective fixation and minimally invasive surgery

Method used

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  • Medical internal fixator for posterior cruciate ligament lower dead center avulsion fracture
  • Medical internal fixator for posterior cruciate ligament lower dead center avulsion fracture
  • Medical internal fixator for posterior cruciate ligament lower dead center avulsion fracture

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Experimental program
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specific Embodiment

[0022] as attached Figures 3 to 5 As shown, after the fracture is reduced, the fixator body is pressed against the bone surface, the semi-circular arc notch is aligned with the posterior cruciate ligament, and the two barb-shaped curved hooks extending forward are located on both sides of the posterior cruciate ligament and pressed against the bone fragment. First, in the hole next to the semi-arc notch, drill holes into the fractured bone fragments, and screw in lag screws to make the steel plate close to the fracture fragments, and press the fracture fragments, and then screw in the screw holes in turn to lock Screws or lag screws are used to fix the fracture, and finally, according to the needs of surgical fixation, the first lag screw is replaced with a locking screw or no replacement.

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Abstract

The invention discloses a medical internal fixator for posterior cruciate ligament lower dead center avulsion fracture. The medical internal fixator comprises a fixator body. The fixer body comprises a bent part and a straight part; the bent part and the straight part are of an integrated plate type structure; the straight part is bent to the bent part in the reverse direction of the straight part, and the bent part is arc-shaped; a semi-arc notch is formed in the top end of the bent part; the top ends of the two side walls of the notch extend forwards to be bent in a barb shape. And a plurality of through holes through which locking screws can pass are sequentially formed in the surface of the fixator body from the semi-arc notch to the tail end of the straight part. According to the fixator, fracture reduction, firm and effective fixation and minimally invasive surgery can be achieved; and the problem that the strength of the internal fixation material is reduced due to manual bending of the steel plate during an operation can be avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an internal fixator for avulsion fractures at the lower insertion point of the posterior cruciate ligament for medical use. Background technique [0002] There are anterior and posterior cruciate ligaments (also known as cruciate ligaments) in the knee joint. figure 1 As shown in part A of , the posterior cruciate ligament originates from the posterior, anterior, upper and medial of the tibial intercondylar eminence and inserts on the outside of the medial malleolus of the femur. Whether the knee is straightened or flexed, the anterior and posterior cruciate ligaments are in a tense state, and the posterior cruciate ligament It prevents the tibia from moving backwards. In clinical practice, the inferior insertion fracture of the posterior cruciate ligament is a kind of intra-articular avulsion fracture. The reason for the fracture is that the ligament is subjected to gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/80
CPCA61B17/8061A61B17/8057A61B2017/564
Inventor 王骏飞孙旭朱博闻
Owner NANJING DRUM TOWER HOSPITAL
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