Bio-Mechanical behaviour of artificial intervertebral disc in lumbar spine

Abstract

Total Disc replacement has the higher success rate for reducing the lower back pain and increased mobility in intervertebral disc in lumbar spine region. An Artificial disc replacement, the method is designed to bring about pain relief by eliminating the painful disc, then the motion at that spinal section is kept with the use of a prosthetic implant. This creates a need for studies to be conducted to examine these failures. The main aim of this study is to develop and designing an artificial intervertebral lumbar disc based on literature and validates its function using finite element analysis. A finite element model of L4 to L5 section of lumbar spine model was created by using computer tomography scan images of a person. From that a surface model of the L4 to L5 lumbar section model was developed. From that, Different components were added to complete the intact L4-L5 lumbar section model and concerned properties were attributed to each of the component model. This intact spine model was then validated with reported literature. To analyse the range of motion variation and also compared to the validated intact spine analysis results with the reported literature. Thus, a biomechanical behavior study of the lumbar spine was conducted to analyse the range of motion where a semi-constrained artificial lumbar disc is designed and checked for the normal motion by comparing intact model spine and artificial disc implanted spine results using finite element analysis.