Orthopedic vertebral body repositioning device

Abstract

Disclosed is an orthopedic vertebra reduction device which consists of a reduction nut (1), a reduction rod (2) and a fixed rod (3). The back end of the fixed rod (3) is provided with screw thread which is matched with the reduction nut (1) and the side surface of the front end of the fixed rod (3) is provided with a plurality of ratchets. The reduction rod (2) is sleeved on the fixed rod (3); the front end of the reduction rod (2) is provided with gears. The invention is used to restore the isthmic spondylolisthesis, the invention can be used singly or used in cooperation with a pedicle of vertebral arc nail pulling method, and the operation can achieve better effect especially when the pedicle of vertebral arc nail path is damaged or when a patient suffers from osteoporosis. The invention which is simple in operation and powerful in reduction can complement the defect of the reduction method of the traditional orthopedic vertebra reduction device.

Description

technical field [0001] The invention relates to a special instrument for lumbar spondylolisthesis orthopedic surgery. Specifically, it is an orthopedic vertebral body dislocation reduction internal fixation auxiliary device. Background technique [0002] Lumbar spondylolisthesis is a common and frequently-occurring disease in the field of orthopedics. The main symptoms are low back pain, or radicular pain, numbness, and intermittent claudication in the lower limbs. The incidence rate in the population is about 5%, and a large number of patients need surgery. With the advancement of new internal fixation devices and technologies, great progress has been made in the treatment of spondylolisthesis, and surgical treatment has the best effect. The surgical treatment process is divided into three steps: reduction, fixation, and bone graft fusion. It is also the key to surgical treatment. At present, the usual reduction method is to lift the pedicle screw. However, if the pedicle ...

AI Technical Summary

Problems solved by technology

With the advancement of new internal fixation devices and technologies, great progress has been made in the treatment of spondylolisthesis, and surgical treatment has the best effect. The surgical treatment process is divided into three steps: reduction, fixation, and bone graft fusion. It is also the key to surgical treatment. At present, the usual reduction method is to lift the pedicle screw. However, if the pedicle screw channel is damaged during the operation, or the patient suffers from osteoporosis and severe spondylolisthesis, Often, the pedicle screw protrudes from the screw channel during reduction and pulling, and the purpose of reduction cannot be achieved, resulting in the failure of the operation

Images