Vertebra pedical nail of thoracolumbar vertebral fracture posterior minimally-invasive screw-rod system

Abstract

The invention provides a vertebra pedical nail of a thoracolumbar vertebral fracture posterior minimally-invasive screw-rod system. The vertebra pedical nail is characterized in that the vertebra pedical nail is a long-tail hollow nail; the far end of the hollow nail is provided with a cancellous bone thread (1) and the near end of the hollow nail is provided with a cortical bone thread (2); a nail tail (3) is designed to be a U shape; the far end of the nail tail is provided with a long tail (4); a nail tail self-shearing mark (5) is arranged at the outer side of the connection part of the nail tail and the long tail; the outer side of the long tail is provided with a long-tail plane (6); trapezoid threads (7) are arranged at the inner sides of the nail tail and the long tail; square-corner grooves (8) are formed in the trapezoid threads. The sizes of the system parts are as follows: the diameter of the far end of the hollow nail is 3.0mm to 7.0mm and the diameter of the near end of the hollow nail is gradually increased; the length of the nail is 25mm to 60mm, the diameter of the nail tail is 10mm to 20mm and the length of the nail tail is 10mm to 20mm; the width of the U shape is 6mm to 8mm and the length of the long tail is 30mm to 50mm; the distance of the long-tail plane is 12mm to 18mm. The diameters of the trapezoid threads of the long tail and the nail tail are the same. The square-corner grooves are 6mm to 16mm long and 4mm to 8mm wide. The long-tail hollow nail is provided with a single-direction long-tail nail or a universal long-tail nail. The trapezoid threads are arranged at the inner sides of the nail tail and the long tail, and the square-corner grooves or square-corner-free grooves are formed in the inner sides of the trapezoid threads.

Description

technical field [0001] The invention is applied to clinical orthopedics, is an internal fixation system for thoracolumbar fractures, and belongs to medical equipment. It is used as an internal fixation device for closed reduction and internal fixation of human thoracic and lumbar posterior longitudinal ligament intact but unstable fractures. The application of the device not only helps to reduce the operation trauma, but also helps to reduce the operation and hospitalization time. Background technique [0002] The treatment of thoracolumbar fractures is developing and changing. Roy-Camille et al. began to use pedicle screws and plates for internal fixation of thoracolumbar fractures in 1961. After half a century of clinical application and multi-center research and analysis, it is believed that pedicle screws are effective in treating thoracolumbar fractures. The posterior internal fixation system has also evolved from the nail-plate to the nail-rod system. Surgical trau...

AI Technical Summary

Problems solved by technology

However, obtaining and maintaining closed reduction of the thoracolumbar spine is quite difficult

There are relevant internal fixation devices on the market now, but there is still room for improvement

Images