Polyether-ether-ketone artificial spine intervertebral disc

Abstract

A polyether-ether-ketone artificial spine intervertebral disc comprises an upper end plate, a lower end plate and a nucleus pulposus prosthesis arranged between the upper end plate and the lower end plate. The nucleus pulposus prosthesis is made of medical stainless steel or vitallium or biological ceramic and the upper end plate and the lower end plate are made of polyether-ether-ketone. The upper surface of the upper end plate and the lower surface of the lower end plate are respectively provided with a coarse surface and each coarse surface is formed according to the physical machining methods such as carving conducted by a carving machine and emery spraying. The upper end plate and the lower end plate are fixed to the spine in a fused mode, the nucleus pulposus prosthesis is placed between the upper end plate and the lower end plate and is also called a rotary center, three-dimensional rotary movement is achieved among the nucleus pulposus prosthesis, the upper end plate and the lower end plate, and therefore the function of motion of the normal spine intervertebral disc of a person can be provided. The upper end plate and the lower end plate which are made of the polyether-ether-ketone are good in biocompatibility and self-lubrication and quite resistant to abrasion. The nucleus pulposus prosthesis is good in mechanical performance and high in strength. The polyether-ether-ketone artificial spine intervertebral disc has the advantages of being simple in structure, good in biocompatibility, durable, and wide in adaptation disease range.

Description

technical field [0001] The invention belongs to the technical field of orthopedic internal fixation devices, and in particular relates to a polyether ether ketone artificial spinal intervertebral disc suitable for spinal trauma and pathological conditions. Background technique [0002] At present, the artificial intervertebral discs of the spine are made of ultra-high molecular weight polyethylene (UHMWPE) and metal at home and abroad. Ultra high molecular weight polyethylene (UHMWPE) is the most widely used material for friction parts, and the most important target cells of UHMWPE wear particles are macrophages. [0003] Metal, polyethylene, and polymethylmethacrylate (PMMA) particles all resulted in macrophage infiltration and the production of large amounts of inflammatory cytokines. Osteoclasts are multinucleated cells differentiated from osteoclast precursor cells of the mononuclear macrophage lineage and are the most important cells leading to bone resorption. The p...

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Problems solved by technology

[0004] However, UHMWPE has poor wear resistance. Wear not only reduces the service life of the prosthesis, but the wear particles can easily lead to osteolysis and aseptic loosening, which will lead to the consequences of secondary surgery.

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