GS0108-337 脊椎インプラントのコネクタによる延長時の応力解析

抄録

Scoliosis is a disease in which the spine is curved to the lateral. Surgery is the only way to revert from serious scoliosis to normal spinal array. Metallic implant is used in scoliosis surgery to correct the spine array. The spinal implant is composed of a plurality of components such as rod, connector and screw. However, the implant installed would be sometimes broken in everyday life. In this study, the implant model is recreated in the CAD system, to perform stress analysis by the finite element method. It is clarified that the absolute value of the longitudinal compressive stress increases at the edge portion of the slit of the connector and the tensile stress increases at the central portion of the connector side closer to the vertebra.