Sliding adjustable fixation plate for vertebral anterior

Abstract

The invention relates to a sliding adjustable fixation plate for vertebral anterior. The fixation plate comprises an upper sliding plate and a lower fixation plate. The upper sliding plate is T-shaped, the transverse piece of the upper sliding plate is provided with locking nail holes for the upper sliding plate, the lower edge of the two sides of the longitudinal piece of the upper sliding plateis respectively formed with a first sliding groove, and the upper edge of the two sides of the longitudinal piece of the upper sliding plate is respectively formed with a first sliding rail; the lowerfixation plate is U-shaped, the transverse piece of the lower fixation plate is provided with locking nail holes for the lower fixation plate, the upper edge of the inner side of two longitudinal pieces of the lower fixation plate is respectively formed with a second sliding groove, and the lower edge of the inner side of two longitudinal pieces of the lower fixation plate is respectively formedwith a second sliding rail; and the longitudinal piece of the upper sliding plate is inserted in the U-shaped notch of the lower fixation plate, the first sliding groove of the upper sliding plate ismatched with the second sliding rail of the lower fixation plate, and the first sliding rail of the upper sliding plate is matched with the second groove of the lower fixation plate, so that the uppersliding plate can move along a longitudinal direction with respect to the lower fixation plate. According to the present invention, a sliding structure with bilateral side sliding groove-sliding railis adopted in the upper sliding plate and the lower fixation plate, which not only has a stable and reliable sliding mode, but also can effectively provide torsional strength.

Description

technical field [0001] The invention relates to an anterior vertebral body fixation plate, in particular to a sliding adjustable anterior vertebral body fixation plate capable of freely adjusting the length of the fixation plate. Background technique [0002] According to the "three-column theory", the stability of the spine is provided by the anterior column, the middle column and the posterior column. When the vertebral body is resected, the anterior longitudinal ligament is resected, or the intervertebral disc is resected, the stability of the anterior column of the vertebral body is seriously lost, and the pedicle fixation from the posterior spine alone cannot meet the structural strength. Necessary for front post stability. [0003] At present, the existing titanium plate for anterior fixation has defects such as thin connection method, poor torsional strength, small adjustable length, and complicated connection method. Contents of the invention [0004] In view of ...

AI Technical Summary

Problems solved by technology

When the vertebral body is resected, the anterior longitudinal ligament is resected, or the intervertebral disc is resected, the stability of the anterior column of the vertebral body is seriously lost, and the pedicle fixation simply from the posterior approach of the spine cannot meet the structural strength. Necessary means of anterior column stability

[0003] At present, the existing anterior fixation titanium plate has defects such as thin connection method, poor torsional strength, small adjustable length, and complicated connection method

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