Artificial intervertebral disc prosthesis based on metal rubber

Abstract

The invention relates to an artificial intervertebral disc prosthesis based on metal rubber, which comprises an upper end plate, a lower end plate and an outer sheath layer which is positioned betweenthe upper end plate and the lower end plate and forms a circumference; a hollow metal rubber cylinder which is pressed by the upper end plate and the lower end plate is arranged on the inner side ofthe outer sheath layer; the upper side of the lower end plate is provided with a sleeve which extends upwards into the inner hole of the metal rubber cylinder, the lower side of the upper end plate isprovided with a shaft body which extends downwards into the sleeve, and the circumferential part of the shaft body is uniformly provided with a plurality of elastic ball motion devices which are arranged on the inner wall of the sleeve. The artificial intervertebral disc prosthesis not only can support and damp, but also acts as a contact pair for the motion of the prosthesis, the nucleus pulposus is low in abrasion, and the service life is long; by using the metal rubber cylinder woven by stainless steel wires and punched, not only are the wear resistance and corrosion resistance of the metal material kept, but also a certain supporting rigidity is provided; under the same application condition, the prosthesis has the advantages of superior performance and stronger damage resistance.

Description

technical field [0001] The invention relates to an artificial intervertebral disc prosthesis based on metal rubber, which belongs to the field of medical instruments. Background technique [0002] Lumbar disc herniation and cervical disc degeneration are common and frequently-occurring diseases. Epidemiological investigations show that: approximately up to 80% of people have symptoms of low back pain in their lifetime. With the advancement of minimally invasive and non-fusion techniques in spinal surgery, artificial disc replacement is expected to become another new feasible option for the treatment of lumbar diseases. In addition, artificial disc replacement can theoretically reconstruct the biomechanics of the spine, and has fewer complications than traditional fusion. [0003] At present, the artificial intervertebral disc prosthesis that has been applied mostly adopts the method of spherical surface contact and cooperation between the nucleus pulposus and the upper end...

AI Technical Summary

Problems solved by technology

Moreover, the traditional artificial intervertebral disc nucleus pulposus is mostly made of polymer materials such as UHMWPE or pure metal materials, which cannot simultaneously meet the requirements of support stiffness and damping energy consumption in the biomechanics of artificial intervertebral discs.

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