A combined artificial vertebral body

Abstract

The invention relates to a combined artificial vertebral body and belongs to the technical field of internal fixation of implantation materials of vertebral column surgery. The combined artificial vertebral body is especially used for treating the diseases, such as spinal tumor, tuberculosis and fracture, and for replacing the vertebral body and recovering a normal physiological function of the vertebral column of human body. The combined artificial vertebral body comprises convex cover plates, concave cover plates, fixing bolts, an inner supporting block, an outer supporting block and a spring; the inner supporting block is mounted in an inner hole of the outer supporting block; the spring is inserted into the inner hole of the inner supporting block; the concave cover plates are mounted at the two ends of the outer supporting block through the fixing bolts; the two convex cover plates are respectively assembled on concave spherical surfaces of the two concave cover plates through convex spheres, thereby forming the combined artificial vertebral body; hemispheric convex spheres are arranged on one surfaces of the convex cover plates; sharp cylinders which are uniformly distributed and thin plates which are vertical to the convex cover plates and are provided with tooth-shaped grooves are arranged on the other surfaces of the convex cover plates; the concave spherical surfaces are respectively arranged on one surfaces of the concave cover plates; the concave spherical surfaces are arranged for accommodating the convex spheres of the convex cover plates; and a plurality of cylindrical footstep holes are arranged in one sides of the concave spherical surfaces of the concave cover plates.

Description

technical field [0001] The invention relates to a combined artificial vertebral body, which belongs to the technical field of implant internal fixation in spinal surgery, and is especially used for treating spinal tumors, tuberculosis, fractures and other diseases to replace the vertebral body and restore normal physiological functions of the human spine. Background technique [0002] Since the artificial vertebral body was first used clinically in 1969, the artificial vertebral body has been widely used clinically as an effective vertebral body substitute, bringing great convenience to the treatment of spinal tumors, tuberculosis and fractures. The vertebral body can not only better restore the physiological and anatomical structure of the spine and correct kyphosis, but also have a prominent effect on the reconstruction of spinal stability. With the development of spinal vertebral body reconstruction and fusion techniques, artificial vertebral bodies, as a vertebral body s...

AI Technical Summary

Problems solved by technology

However, some biomechanical tests and clinical applications have shown that the traditional artificial vertebral body still has some defects in the treatment. For example, the artificial vertebral body is insufficient in axial rotation, and it is not strong enough when combined with the upper and lower vertebral bodies, resulting in implants Prolapse, subsidence, etc., fail to achieve satisfactory bony fusion, poor long-term stability, and lose part of the normal curvature of the spine

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