Hard endplate and soft vertebral pulp integrated weaved artificial intervertebral disc prosthesis

Abstract

The invention discloses a novel integrated artificial intervertebral disc prosthesis, belongs to medicinal human implants and is used for treating degenerative lumbar diseases. The structure of the artificial intervertebral disc prosthesis is an integral structure, and consists of an upper endplate, a lower endplate, an elastic core, an elastic fiber bundle net, and a polymer gasket, wherein the upper endplate and the lower endplate are made of metal titanium; the elastic core, the elastic fiber bundle net and the polymer gasket are made of a medical polymer material; the elastic core has a structure which is clamped between the upper endplate and the lower endplate and has the elastically supporting function, and the elastic core is designed into a nucleus pulposus-like structure and has the characteristics of supporting and elastically buffering load; the upper endplate and the lower endplate are made of titanium alloy without influencing the magnetic resonance imaging, can develop under X-rays, are made according to physiologic intervertebral disc endplates in shape, are provided with anchorage points so as to conveniently weave fiber bundles, and are sprayed with hydroxyapatite and provided with keel to be favorable for bone ingrowth and prosthesis stabilization; the elastic fiber bundle net is weaved to be anchored on the endplates and weaved into the net outside the elastic core to play a role in connecting various components into a whole; the included angle between the net and the horizontal plane is an acute angle of 30+/-10 degrees so as to match the included angle between the fiber bundles of the human intervertebral disc and the endplates; and the polymer gasket is coated on the outer layer of the fiber bundle to prevent the soft tissue ingrowth and coat the fragments, so that the biocompatibility is improved. Under the ideal condition, the anterior-ventral median sternotomy can be made.

Description

Technical field: [0001] The invention relates to a novel artificial lumbar intervertebral disc prosthesis, which belongs to the orthopedic internal fixation medical device implanted in the human body. It can be used for mild to moderate lumbar degeneration, discogenic low back pain, lumbar disc herniation, mild to moderate neurogenic intermittent claudication, degeneration of adjacent intervertebral discs after fusion, intervertebral disc resection of L5 sacralization, and isolated Modic I lesions treat. Background technique: [0002] Lumbar degenerative disease (Lumbar degenerative disease, LDD) has always been one of the most common diseases in humans. According to statistics from Hult in the United States, 80% of people will suffer from LDD in their lives. The US National Center for Health Statistics reported that the most common cause of activity restriction under the age of 45 is low back and leg pain caused by LDD. The annual cost of LDD treatment amounts to hundreds ...

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the above-mentioned problems of the existing integrated artificial lumbar intervertebral disc prosthesis, the object of the present invention is to provide an artificial lumbar intervertebral disc prosthesis with a simple and reliable structure, physical properties

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