Vertebral body union internal fixation system

Abstract

The invention provides a vertebral body union internal fixation system which is used for performing internal fixation on a vertebral column. The vertebral body union internal fixation system comprises an artificial vertebral body main body, vertebral body fastening screws, a vertebral body connector, vertebral pedicle screws and a longitudinal connection rod. According to the vertebral body union internal fixation system, the artificial vertebral body main body, an adjacent upper vertebral body and an adjacent lower vertebral body are compactly fixed through the vertebral body fastening screws; fixation and support of vertebral column posterior are achieved through the vertebral pedicle screws and the longitudinal connection rod; and the artificial vertebral body main body and the longitudinal connection rod are compactly connected and fastened through the vertebral body connector. The vertebral body union internal fixation system is used for being inserted to replace resected or deleted parasitic vertebral body sections to enable the physiological height of the vertebral body to be recovered and rebuilt and forming synostosis between the adjacent upper vertebral body and the adjacent lower vertebral body in the future.

Description

technical field [0001] The invention relates to the field of orthopedic implants, and more specifically, relates to a vertebral body combined internal fixation system for internal fixation of the spine. Background technique [0002] In the treatment of human spinal diseases, spinal tumors, tuberculosis and severe fractures often cause vertebral body damage, which may lead to spinal cord nerve damage, so vertebral body resection has to be performed. After vertebral body resection, the spine needs to rebuild its stability. The emergence of vertebral body replacement provides an ideal method for the treatment of such diseases. Since the first report of vertebral body tumor resection and prosthetic replacement in the late 1960s, artificial vertebral bodies have been widely used clinically as a kind of effective vertebral body substitutes. However, clinical application and a series of biomechanical tests have shown that the traditional artificial vertebral body still has some pr...

AI Technical Summary

Problems solved by technology

However, clinical application and a series of biomechanical tests have shown that the traditional artificial vertebral body still has some problems to be solved in some aspects, especially the insufficient stability of postoperative axial rotation and the early integration with the upper and lower vertebral bodies. Low strength can easily lead to implant displacement or even prolapse. In order to ensure the bone volume of the central bone grafting hole, the design area of ​​the upper and lower endplates of the artificial vertebral body is reduced, and the supporting strength is insufficient, so that the artificial vertebral body is trapped in the endplates of the upper and lower vertebral bodies. Finally lost the ideal height

In order to reduce the impact of the above problems, people have to implement an anterior or posterior nail-plate or nail-rod fixation system while implanting the artificial vertebral body in order to provide stability in the early stage and during the fusion period, which virtually deteriorates the internal fixation. The mechanical environment of the screws in the system increases the probability of screw breakage and aggravates the phenomenon that the artificial vertebral body sinks into the upper and lower vertebral body endplates

Images