Medical bone taking-out device

Abstract

The invention discloses a medical bone taking-out device which comprises a connecting barrel, a self-tapping thread head, fixing frames and a telescopic part. The connecting barrel is provided with a hollow first inner cavity, and the wall surface is provided with at least two through holes communicating with the first inner cavity, the self-tapping thread head is formed at one end of the connecting barrel, the fixing frames correspond to the through holes one to one and are arranged in the first inner cavity of the connecting barrel and used for being connected to the bone. The telescopic part is arranged in the first inner cavity, fixedly connected with the fixing frames and used for driving the fixing frames to extend out of or shrink back to the connecting barrel through the through holes. According to the taking-out device, the fixing frames are telescopically fixed into the first inner cavity of the connecting barrel through the telescopic part. When the bone is taken out, the fixing frames shrink back into the first inner cavity, and the self-tapping thread head is continuously screwed into the bone; after the self-tapping thread head rotates to be in place, the telescopic part drives the fixing frames to extend out of the connecting barrel through the through holes and the fixing frames are fixed to the bone, and thus the rotary motion of the self-tapping thread head is not affected.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a medical bone removal device. Background technique [0002] At present, artificial total hip replacement and artificial femoral head replacement are the most effective means for treating end-stage hip disease. During the operation, the diseased femoral head needs to be removed and an artificial hip joint implanted. Because the diseased femoral head is protected by the surrounding soft tissue and ligaments, plus hyperplasia and sclerosis, it is often difficult to remove the diseased femoral head during the operation. [0003] In the prior art, doctors usually use a spiral-shaped head extractor to screw a screw into the cancellous bone of the femoral head, and then pull the handle to take out the femoral head. In order to hold the femoral head and prevent rotation, the head needs to be hammered hard It is easy to cause damage to the femoral head and acetabulum, and b...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the bone extraction device in the prior art is fixed on the bone through a cross, which will affect the rotation of the self-tapping screw head

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