3D printed novel artificial cervical intervertebral joint

Abstract

The embodiment of the invention discloses a 3D printed novel artificial cervical intervertebral joint which comprises an upper cone, a nucleus pulposus-spring structure unit and a lower cone; the nucleus pulposus-spring structure unit comprises a nucleus pulposus body and a medical spring, and the nucleus pulposus body comprises an upper spherical surface of a nucleus pulposus body, a nucleus pulposus main body and a nucleus pulposus lower connector which are of an integrated structure. A concave surface matched with the upper spherical surface of the nucleus pulposus body is arranged on the bottom surface of the upper cone, the upper cone and the he nucleus pulposus body are contacted through the spherical surface, a channel for the nucleus pulposus lower connector to move is arranged in the lower cone, and the medical spring is arranged in the channel and acts on the nucleus pulposus lower connector. A spring limiting clamping opening penetrating into the channel is formed in the side face of the lower cone, and a spring limiting clamping plate for limiting the medical spring to be in a compressed state is inserted into the spring limiting clamping opening. By adopting the 3D printed novel artificial cervical intervertebral joint, the problems that prosthesis dislocation exists after an existing artificial cervical intervertebral disc replacement operation, and an existing artificial cervical intervertebral disc is difficult to install can be solved.

Description

technical field [0001] The invention relates to the technical field of medical prosthesis and 3D printing, in particular to a new type of 3D printed artificial cervical intervertebral joint. Background technique [0002] Cervical spondylosis is mainly caused by intervertebral disc herniation. If the pain is mild, massage can relieve the pain, while if it is more serious, the diseased intervertebral disc needs to be removed surgically, and an artificial intervertebral disc prosthesis is implanted into the patient's intervertebral disc through cervical disc replacement. However, the artificial intervertebral disc prosthesis also has some disadvantages: first, the product structure is cumbersome, and the size selection is single. For some individuals with large or small vertebrae, the intervertebral height cannot be maintained well after the prosthesis is implanted, resulting in excessive intervertebral space. Or too small, resulting in a decrease in joint mobility, eventually ...

AI Technical Summary

Problems solved by technology

[0002] Cervical spondylosis is mainly caused by intervertebral disc herniation. If the pain is mild, massage can relieve the pain, while if it is more serious, the diseased intervertebral disc needs to be removed surgically, and an artificial intervertebral disc prosthesis is implanted into the patient's intervertebral disc through cervical disc replacement. However, the artificial intervertebral disc prosthesis also has some disadvantages: first, the product structure is cumbersome, and the size selection is single. For some individuals with large or small vertebrae, the intervertebral height cannot be maintained well after the prosthesis is implanted, resulting in excessive intervertebral space. Or too small, resulting in a decrease in joint mobility, eventually resulting in soft tissue ossification; second, the poor fatigue and wear resistance of the product, resulting in easy wear of the prosthesis, and most of the prosthesis brackets are metal structures, which are incompatible with the original vertebral tissue The biocompatibility is extremely poor, and it is easy to destroy the distribution law of human biomechanics, resulting in the loss of artificial prosthesis

At present, the artificial cervical intervertebral discs in the market adopt the simplified structure of the traditional human cervical spine, which has a single function and form. The shape of the cervical spine endplate of each patient is different. It is impossible to match the physiology of all patients with a ready-made standard implant. parameters, it is easy to cause the artificial intervertebral disc to fall off, and it is difficult to adapt to the individual needs and the requirements of flexible manufacturing. In addition, the existing artificial cervical spine is limited in activity strength, and it is difficult to guarantee the success of the operation.

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