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Atlas fusion prosthesis

A prosthesis and atlas technology, applied in the field of atlas fusion prosthesis, can solve the problems of long-term fixation and slow fusion

Inactive Publication Date: 2012-05-02
PEKING UNIV THIRD HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an atlas fusion prosthesis to solve the problems of slow fusion and long-term fixation caused by the existing bone graft and titanium cage implantation

Method used

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Embodiment Construction

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0025] figure 1 An atlas fusion prosthesis according to an embodiment of the present invention is shown in , which includes: an atlas fusion prosthesis main body 10, on which an upper articular fusion surface 20 and a lower articular fusion surface are provided. The upper and lower joint fusion surfaces are processed by CNC machine tools after extracting the surface data of the occipital condyle articular surface of the lower part of the occipital bone and the upper articular surface of the axial vertebrae respectively. It can also be constructed by rapid prototyping technologies such as laser sintering or high-energy electron beam melting, with curved surface height fitting characteristics. The upper joint fusion surface of the atlas fusion prosthe...

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Abstract

The invention discloses an atlas fusion prosthesis which is arranged between an occipital bone and an axis to replace a physiological atlas. The atlas fusion prosthesis comprises a prosthesis body, an upper joint fusion face which is arranged at the upper part of the prosthesis body and used for sticking with an occipital condyle joint face of the occipital bone and a lower joint fusion face which is arranged at the lower part of the prosthesis body and used for sticking with an upper joint face of the axis. The atlas fusion prosthesis disclosed by the invention has the main advantages that the atlas prosthesis with a fusion face matching both the occipital bone and the axis is implanted to replace the physiological atlas so as to rapidly recover functions of the atlas, promote sacralization, realize the purpose of reconstructing cervical stability and facilitate postoperative recovery.

Description

technical field [0001] The invention relates to the field of orthopedic implants, in particular to an atlas fusion prosthesis replacing natural atlantoaxial joints. Background technique [0002] The atlantoaxial joint is a very special and important spinal structure that connects the skull to the spine. However, due to various reasons such as trauma, tumors, congenital malformations, tuberculosis, rheumatoid arthritis and other pathological changes, atlas damage and loss are sometimes encountered in orthopedic treatment. Due to the extremely special location and anatomical structure of the atlantoaxial joint, conventional cervical fusion cages cannot be applied, and there is currently no alternative for atlas prosthetic implantation. In clinical practice, doctors can only temporarily use autologous or allogeneic bone for bone grafting or implant modified titanium cage or titanium mesh for bone fusion according to the specific situation. Fusion brings great inconvenience to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44
CPCA61F2/44A61F2002/30001
Inventor 刘忠军
Owner PEKING UNIV THIRD HOSPITAL
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