Chinese Journal of Sports Medicine 1982;0(02):-

LUMBAR SPONDYLOLYSIS:A BIOMECHANICAL STUDY

Liyang DAI

Keywords

lumbar spine; spondylolysis; spondylolisthesis; biomechanics; finite element method

Country

China

Language

Chinese

Abstract

A mechanical model was constructed with three-dimensional finite element method to analyse the statusof stress distribution in the isthmus of the neural arch. It was found that the stress concentrate significantlyin the isthmus with spine upright. flexed and extended, and most obviously in extension position. The auth-ors conclude that spondylolysis is mainly the fatigue fracture due to locally increased stress and is contribut-ing most by backward extension of lumbar spine.