Assembled total intervertebral disc prosthesis based on 3D printing technology and making method thereof

Abstract

The invention discloses an assembled total intervertebral disc prosthesis based on a 3D printing technology. The prosthesis comprises an upper backing plate, an upper plate, a lower plate and a lowerbacking plate which are detachably connected in sequence from top to bottom, wherein a buffer gasket is arranged between the upper plate and the lower plate; the upper backing plate and the lower backing plate are made through 3D printing; the upper surface of the upper backing plate and the lower surface of the lower backing plate are matched with the end faces of the adjacent intervertebral spaces for predetermined installation of the prosthesis respectively; and the upper backing plate and the lower backing plate are both of porous structures. The invention further discloses a making methodof the assembled total intervertebral disc prosthesis based on the 3D printing technology. The defects in the prior art can be overcome, and high-quality prosthesis-end plate interface osseointegration is achieved; and the 3D printing method adopted by the invention can be better matched with the vertebral end plate form of the human body, so that the operation difficulty of end plate grinding and the like in an operation is reduced, the technical requirements of the intervertebral disc replacement operation are reduced, the technical popularization can be better carried out, and more patients can be served.

Description

technical field

[0001] The invention relates to the field of medical devices, in particular to a modular total intervertebral disc prosthesis based on 3D printing technology. Background technique

[0002] Clinically, it has been found that after artificial cervical disc replacement, the prosthesis and the endplate are not well fitted.

[0003] The design concept of cervical disc replacement (CDR) is to complete cervical discectomy and decompression in the spinal canal, and at the same time preserve the range of motion of the surgical segment to simulate the normal physiological motion of the cervical spine to the greatest extent and reduce the fusion of adjacent segments. Acceleration occurs. Mid-term follow-up reports of several multi-center prospective clinical randomized controlled trials approved by the US FDA suggest that CDR successfully preserves the range of motion of the surgical segment, and its overall curative effect is better than or at least not inferior to an...

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