Combined type lumbar vertebra dynamic fixing device

Abstract

The invention discloses a combined type lumbar vertebra dynamic fixing device which comprises a flexible motion device and titanium alloy screws. The flexible motion device comprises an alloy spring, a first flexible plastic sleeve, a second flexible plastic sleeve, an upper L-shaped base and a lower L-shaped base, the upper L-shaped base and the lower L-shaped base are in threaded connection with the titanium alloy screws, and the upper end and the lower end of the alloy spring are sleeved with the two flexible plastic sleeves respectively. Sliding sheets are arranged at the upper end and the lower end of the first flexible plastic sleeve and the upper end and the lower end of the second flexible plastic sleeve respectively. Sliding grooves are formed in the bottom of the upper L-shaped base and the bottom of the lower L-shaped base respectively, the corresponding flexible plastic sleeve and the upper L-shaped base form sliding connection through the sliding sheets and the corresponding sliding groove, threaded holes are formed in the first flexible plastic sleeve, the second flexible plastic sleeve, the upper L-shaped base and the lower L-shaped base respectively, and threaded nails are in threaded connection with the inner portions of the threaded holes. The combined type lumbar vertebra dynamic fixing device has the advantages that the requirement for a human body to do multiple kinds of movement can be met, and replacement is convenient.

Description

technical field [0001] The invention relates to a bone fixation device, in particular to a lumbar vertebra dynamic fixation device, which belongs to the field of medical instruments. Background technique [0002] The lumbar spine fixation device is a device that temporarily or relatively long-term replaces a certain segment of the lumbar spine in the body when the lumbar spine is damaged. In another sense, the device actually becomes a temporary or long-term human "skeleton". Therefore, in terms of function, it is also hoped that it can be infinitely close to the original function of the lumbar spine. Most of the current lumbar vertebra dynamic fixation devices use a single elastic element, which has the advantage of being easy to install, but the disadvantage is that it cannot meet various movements of the human body under various motion state modes. These are all problems existing in the current lumbar spine dynamic fixation device. SUMMARY OF THE INVENTION [0003] Th...

AI Technical Summary

Problems solved by technology

Most of the current lumbar spine dynamic fixation devices use a single elastic element, which has the advantage of being easy to install, but the disadvantage is that it cannot meet various actions in various motion states of the human body. They are all the problems existing in the current lumbar spine dynamic fixation device

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