High-simulation customized combined artificial vertebra

Abstract

The invention discloses a high-simulation customized combined artificial vertebra. The high-simulation customized combined artificial vertebra is a high-simulation prosthetic implant reconstructed according to CT three-dimensional data of the lesion part of the vertebra of a patient, the outer surface of the high-simulation customized combined artificial vertebra is in a porous titanium structure, and the high-simulation customized combined artificial vertebra is formed by connecting a vertebral upper part, a vertebral lower part and vertebral accessories of the porous structure. Thus, after a vertebral body is resected, by combining the upper end and lower end of the artificial vertebra in a screw-in mode, the artificial vertebra can be fixed more firmly, autogenous bone or allogeneic bone transplantation can be carried out in a bone transplanting cage in the vertebral body, and the position of a bone transplanting block is ensured to be stable. Medicaments can be injected for treating the local lesion part by a small medicament re-injecting hole and an optional screw-in joint which are reserved at the sides of the vertebral body, thereby being especially suitable for patients with spinal tuberculosis and tumors. In addition, because the outer surface is made of porous titanium materials, the artificial vertebral body has better biocompatibility, can be used as a carrier for in-vitro co-culture of osteoblasts, and can be further used as a good carrier for ingrowth of blood vessels and osseous tissues.

Description

technical field [0001] The invention relates to an orthopedic prosthesis device in the medical field, in particular to a highly simulated customized combined artificial spine, which can replace the thoracic and lumbar vertebrae according to different conditions of patients, and correct spinal fractures , tuberculosis, tumors and deformities and other diseases after vertebral body resection of spinal instability, to maintain spinal stability. Background technique [0002] At present, the number of patients with spinal tumors, tuberculosis, fractures and deformities is increasing, which can seriously affect the daily life, work, and quality of life of patients, and even endanger the lives of patients. Surgery is one of the effective treatment methods at present. With the advent of various new surgical theories (such as the Tomita procedure) and the improvement of spinal internal fixation techniques, clinical surgical methods have also been continuously improved. At present, m...

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Problems solved by technology

[0003] 1) The currently used artificial vertebral body or titanium mesh structure is not a simulation structure. Although it can restore the stability of the spine and reconstruct the bony integrity of the spine after implantation, there is no vertebral canal protection for the spinal cord after surgery due to the absence of the vertebral body attachment part. , seriously affecting the patient's postoperative spinal stability and functional recovery;

[0004] 2) The titanium mesh bone graft may embed the titanium mesh into the upper and lower vertebral body, resulting in the loss of the height of the reconstructed vertebral body, the volume of the intervertebral foramen is reduced, the nerve root is locally stimulated, and the cervical spine is in an unstable state of force line as a whole, which is very easy to Causes radicular symptoms, especially in patients with osteoporosis

[0005] 3) Part of the artificial vertebral body and titanium mesh are not connected to the spinal internal fixator after implantation. As time goes by after the operation, once the pre-tightening force disappears, the loosening of the implant will inevitably cause spinal instability, and even worse, it will affect the surrounding area. Nerve roots and blood vessels can be damaged, causing serious complications

[0006] 4) Most of the existing artificial vertebral bodies are made of metal materials such as titanium alloys. The common feature is that the elastic modulus is greater than that of the vertebral body, and the interface between the vertebral bone and the artificial vertebral body is prone to generate large stress. Due to poor biocompatibility , it is difficult to achieve a satisfactory intervertebral fusion effect

[0007] 5) After most of the artificial vertebral bodies currently used are implanted, due to the limitation of their overall structure, local drug treatment cannot be performed after surgery, especially for patients with vertebral body tumors and tuberculosis, which may cause recurrence of local lesions after surgery greatly increase

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