Novel quick insertion type short-arm multi-axis screw

Abstract

The invention discloses a novel quick insertion type short-arm multi-axis screw, and belongs to the technical field of medical apparatus and instruments. The novel quick insertion type short-arm multi-axis screw comprises a short-arm multi-axis rear seat, a locking nut, a connecting rod and a pedicle screw. The short-arm multi-axis rear seat comprises a cylindrical shell, a guide sleeve and a reverse locking mechanism, the guide sleeve is fixedly arranged on the inner lower portion of the cylindrical shell, the reverse locking mechanism is arranged on the lower portion of the inner side of theguide sleeve, two opposite first deformation grooves are formed in the upper portion of the shell, and an annular protrusion is arranged on the inner ring surface of the lower end of the shell; the locking nut is connected with the upper end of the short-arm multi-axis rear seat in a threaded manner, a through hole which is perpendicular to the axis of the locking nut is formed in the lower portion of the locking nut, the lower end of the through hole is of an elastic deformation structure, and the lower end surface of the locking nut is matched with the upper end of the guide sleeve of the short-arm multi-axis rear seat; the connecting rod penetrates the through hole in the locking nut, and two ends of the connecting rod extend out of the two first deformation grooves of the short-arm multi-axis rear seat; the pedicle screw is fittingly connected with the reverse locking mechanism of the short-arm multi-axis rear seat. The novel quick insertion type short-arm multi-axis screw has theadvantage that the problems of interference on screw screwing-in, long screw screwing-in time and increase of surgical difficulty at present in the prior art can be solved by the aid of the novel quick insertion type short-arm multi-axis screw.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a novel quick-insert short-arm multiaxial screw. Background technique [0002] In recent years, with the continuous increase of falling injuries and traffic injuries, thoracolumbar spine fractures have shown a clear upward trend, often accompanied by spinal cord injuries. If early treatment is delayed, inappropriate or unsatisfactory, it may cause deformity, chronic pain and Neurological dysfunction and other consequences. Therefore, patients should receive thoracolumbar fracture surgery as soon as possible, among which multi-segment spinal fixation is a common method for the treatment of spinal diseases. [0003] At present, bone screws are usually used for clinical fracture surgery. The polyaxial bone screws in the prior art include pedicle screw body, backseat and nut. During the operation, the pedicle screw body needs to be screwed into the For the opera...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a new quick-insert short-arm polyaxial screw, which solves the problems in the prior art that there is interference in the screwing of the screw body, long time for the screw body to be selected, and increased difficulty of the operation.

Images