Emulated artificial spine

Abstract

The invention discloses an emulation artificial spine, which is positioned between an upper vertebral body and a lower vertebral body of a human body. The emulation artificial spine comprises a top intervertebral disc base, a top vertebral ring and a bottom intervertebral disc base from the top down in turn; at least one group of spine units can be arranged between the top vertebral ring and the bottom intervertebral disc base; and the top vertebral ring, the bottom intervertebral disc base and the spine units mutually form freely movable joints capable of performing anteflexion, back extension, lateroflexion from left to right and rotation. The inside of the emulation artificial spine also comprises an elastic component which makes the emulation artificial spine have certain stretch function, and the emulation artificial spine has physiological curvature of a spine of the human body by moulding the elastic component. Therefore, the emulation artificial spine can emulate all motor functions of the spine of the human body and realize replacement of any multisegmental vertebral body, even the replacement of the total spine.

Description

technical field [0001] The invention relates to the technical field of orthopedic implants, in particular to a simulated artificial spine. Background technique [0002] Spinal tumors, spinal tuberculosis, severe spinal comminuted fractures, spinal deformities, multi-segmental degeneration of the cervical spine, etc., many spinal diseases require vertebral body resection. After vertebral body resection, the spine often needs to maintain the height of the spine and rebuild its stability. In the past, autologous bone blocks, allogeneic bone strips or artificial bone were used for implantation, and later they were implanted together with supports such as titanium cages, and assisted by anterior or posterior surgical fixation. In recent years, artificial vertebral implants have been used instead. But there is following shortcoming in the above-mentioned way of prior art: [0003] 1. Both the traditional bone graft internal fixation and the rigid immobile artificial vertebral b...

AI Technical Summary

Problems solved by technology

[0003] 1. Both the traditional bone graft internal fixation and the rigid immobile artificial vertebral body have a common disadvantage, that is, although it can be supported and fixed, it cannot be moved. The load on the vertebrae increases, which is prone to and aggravates spinal degeneration

What's more serious is that as a long-term implant, because it cannot move, it has a great impact on the internal mechanical environment of the spine. When the spine moves, it is easy to generate stress concentration on the interface between the two ends of the prosthesis and the vertebral bone, resulting in loosening of the prosthesis. serious consequences such as prolapse

2. Removal and replacement of vertebral body segments is limited

3. The range of activities is limited, and all activities of the spine cannot be simulated

5. Does not have the physiological curvature of the spine

In the field of surgical treatment of spinal deformities caused by ankylosing spondylitis, the mobility of the spine still cannot be resolved

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