Cervical spine steel plate system with long force arm

Abstract

The invention discloses a single-sequence cervical spine locking steel plate system with a long force arm, made from medical pure titanium or titanium alloy. The single-sequence cervical spine locking steel plate system with a long force arm comprises a bone lamella, bolts and a stop piece. In the single-sequence steel plate of the system, the distance between the upper bolt and the lower bolt of the bone lamella is 18 mm, the centre line of the bone lamella is nailed, and the both ends of the bone lamella are provided with a design of anti-skid teeth, so as to prevent the skidding of the titanium plate; the bone lamella is 10.5 mm wide and 2.5 mm thick, the bolts at the both ends are fixed with an adjustable angle in a 28-degree range, so as to ensure the optimal bolt installation; additionally, the steel plate is 34-40 mm long, wherein one specification is set every 1 mm from 11 mm to 15 mm between a C3 bolt hole and the lower edge of the steel plate. The single-sequence locking steel plate with a long force arm disclosed by the invention is strong in three-dimensional motion stability and anti-skid capacity, and enables operation to become simple and fast because of utilizing single-sequence simplified design, thereby shortening operation time, reducing bleeding amount and keeping injury on soft tissue to a minimum.

Description

technical field [0001] The invention relates to a medical auxiliary treatment device, in particular to a cervical vertebral plate for the treatment of Hangman's fracture with strong fixation of the anterior cervical approach. Background technique [0002] A Hangman fracture is a fracture of the bony junction between the superior and inferior articular processes of the C2, with or without anterior dislocation of the C2. Unstable Hangman fracture, also known as "traumatic anterior spondylolisthesis", often occurs due to traction, extension and axial compression load in the joint area between the upper and lower articular processes of the axis, often accompanied by anterior and posterior longitudinal ligament and intervertebral disc damage, and additional The buckling load often results in displacement or angulation of the vertebral bodies. [0003] Scholars at home and abroad have realized that Hangman fractures will cause anterior slippage of the axis from the mechanism of i...

AI Technical Summary

Problems solved by technology

[0005] At present, there are still certain risks in anterior upper cervical surgery. Due to the high anatomical position, it is not only difficult to expose, but also easy to damage some important structures.

At the same time, because the C2 vertebral body is small and narrowed to a triangular shape, the screws can only be fixed in the pedicle area that is depressed backward. The longitudinal anti-slip effect is affected. On the other hand, the screw is easy to penetrate the posterior cortex or cause splitting of the cortical bone to damage the spinal cord, and it is easy to stray into the intervertebral space, intervertebral foramen and transverse foramen

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