Carbon fiber pedicle screw and manufacturing method thereof

Abstract

The invention provides a carbon fiber pedicle screw and a manufacturing method thereof. A screw body and a screw cap are prepared from carbon fiber composite polyetheretherketone, a screw positioningpin is arranged in the screw body, the screw positioning pin is arranged along the axial direction of the screw body, a screw cap positioning pin is arranged in the screw cap, the screw cap positioning pin is arranged in the radial plane of the screw cap, and the setting direction of the screw positioning pin and the setting direction of the screw cap positioning pin are perpendicular to each other. Through material modification, the modulus of a bone nail material is close to a bone modulus, so that the problems of stress shielding and induced secondary fracture are solved; for different types of patients, the material modulus is adjusted by adjusting a carbon fiber content, and different corresponding screw customization is further performed according to the patient conditions; tantalumpins convenient for X-ray imaging are implanted in the screw body and the screw cap as imaging positioning materials, so that monitoring of the state of the pedicle screw during and after operation isfacilitated, and mutually-perpendicular tantalum pins in the screw body and the screw cap can be more convenient and intuitive for three-dimensional positioning.

Description

Technical field [0001] The invention relates to the technical field of medical implants, in particular to a carbon fiber pedicle screw and a manufacturing method thereof. Background technique [0002] Spinal degenerative disease is a common disease in spinal surgery. Once diagnosed, surgery should be performed as soon as possible. One of its classic surgical procedures is discectomy and bone graft fusion. On the one hand, the nerve compression is directly relieved by removing the diseased disc, and on the other hand, by resection. The internal fixation and implantation of the pedicle behind the intervertebral disc and the bone grafting between the vertebrae achieve intervertebral fusion, which eliminates spinal cord compression and local pain caused by the movement of the vertebral body. At present, it is believed that the success of this operation ultimately depends on the stability of the internal fixation, the holding force and whether the intervertebral bone graft can achieve...

AI Technical Summary

Problems solved by technology

Although the strength of internal fixation and the rate of bone fusion have been greatly improved after many improvements in application, the incidence of pseudoarthrosis at the bone graft interface is still 10%-20%, and even 60% has been reported.

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