Spondylolisthesis vertebra repositor

Abstract

The invention discloses a spondylolisthesis vertebra repositor. The spondylolisthesis vertebra repositor includes an outer frame and rollers, wherein the outer frame comprises an upper frame, a lowerframe, a left frame and a right frame; the rollers are arranged in parallel in the outer frame and the roller diameter is larger than the thickness of the frame, and both sides are higher than the outer frame; one end of the first connecting shaft is connected with the left frame, and the other end is connected with one end of the roller; one end of the second connecting shaft is connected with the right frame, and the other end is connected with the other end of the roller; and the upper frame is connected with a handle. The invention inserts between the spondylolisthesis vertebra and the lower pyramid and / or the upper vertebra during the spondylolisthesis vertebra reduction process, reduces the frictional force between the spondylolisthesis vertebra and the adjacent pyramid, reduces theresistance of the lifting and pulling process of the lifting and pulling screw, and ensures the spondylolisthesis vertebra reduction effect.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a spondylolisthesis resetter. Background technique [0002] At present, when treating diseases such as spinal injuries and spondylolisthesis, the commonly used treatment method is to use the pedicle internal fixation system to reset the slipped vertebrae and perform intervertebral fusion and fixation, and finally restore the normal sagittal sequence and line of force relationship of the spine. Release tension and compression on nerve roots. During the operation, a good reduction can effectively decompress and restore the patient's physiological curvature of the spine. But in fact, the spondylolisthesis is often difficult to reset. The most important difficulty is that the relative resistance of the intervertebral contact part of the vertebral body is relatively large when the vertebral body is reset. Only relying on the power of the pedicle screw to reset the spondylolisthesis...

AI Technical Summary

Problems solved by technology

The intervertebral distractor needs to be closely combined with the spondylolisthesis and the lower vertebral body to play a role. If the bonding force is too small, the spondylolisthesis will not form a whole with the intervertebral distraction, and cannot resist the tension between the upper and lower spreader plates. If the binding force is too high, it cannot play a role; if the binding force is too large, the bone quality of the contact surface will be damaged, which will affect the fusion effect of the intervertebral cage and bone

Images