摘要
作者对于腰椎小关节进行了三维有限元分析。结果表明,腰椎小关节在直立位、前屈位和后伸位时,均出现明显的应力集中。而腰椎间盘退变时,其应力水平又较正常时升高。作者认为,腰椎小关节过载可能是引起腰背疼痛的原因之一。腰椎间盘退变可使小关节承载加大。引起小关节的一系列病理变化,进而导致神经根管狭窄及神经根卡压。
A three-dimensional analysis of facet joints of the lumbar spine is presented. The results obtained indicated that the stress concentrated in the facets while the lumbar spine was upright, flexed or extended and that the stress level in extension was higher than in the other two positions. After degeneration of the intervertebral disc the stress level in the facet was elevated and the yellow ligament and the facet capsule bore more loading. From this study, it was concluded that the facets played an important role in the biomechanics of the lumbar spine, and its overloading might be one of the causes for back pain. Degeneration of the disc would increase thc load on the facets and leaded to stenosis of the nerve canals and entrapment of the nerve roots.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
1990年第2期101-104,共4页
Journal of Biomedical Engineering
基金
国家自然科学基金
关键词
腰椎小关节
生物力学
有限元分析
Facet joints of lumbar spine
Finite element analysis
