有限元方法在腰椎生物力学研究中的应用

有限元方法在脊柱生物力学研究中的应用已得到迅速的发展。本文重点综述了有限元方法在腰椎方面的文献,较全面地介绍了腰椎的有限元模型和有限元方法的应用概况。     

腰椎椎弓峡部裂的生物力学研究

本文采用三维有限元方法建立了腰椎活动节段的力学模型,并着重分析了椎弓峡部的应力分布情况。结果发现椎弓峡部在人体直立位、屈曲位和伸展位时均出现明显的应力集中,其中以后伸位时的应力水平最高。作者认为,椎弓峡部裂实质上主要是由局部应力增高而引起的疲劳骨折,而腰椎后伸与其关系最为密切。     

THE EFFECT OF POSTERIOR ELEMENT RESECTION ON THE STRESS DISTRIBUTION IN THE LUMBAR SPINEA

ＴＨＥＥＦＦＥＣＴＯＦＰＯＳＴＥＲＩＯＲＥＬＥＭＥＮＴＲＥＳＥＣＴＩＯＮＯＮＴＨＥＳＴＲＥＳＳＤＩＳＴＲＩＢＵＴＩＯＮＩＮＴＨＥＬＵＭＢＡＲＳＰＩＮＥＡＤａｉＬｉｙａｎｇ（戴力扬）；ＣｈｅｎｇＰｅｉｌａｉ（成培来）；ＴｕＫａｉｙｕａｎ（屠开元）；Ｘｕ...     

腰椎屈伸活动对腰椎应力分布的影响

用三维有限元方法建立腰椎活动节段的力学模型。结果表明,腰椎后伸时椎间盘纤维环和腰椎后部结构的应力水平明显上升,这提示腰椎的过度后伸可能是导致某些腰椎疾患的病因。     

Three-dimensional finite element analysis of ligaments of lumbar spine

The lumbar ligaments play an important role in spinal biomechanics.The results ofthree-dimensional finite dement analysis showed that one of the functions of lumbar ligaments istransmission of the tensile load between the lumbar vertebrae.The anterior longitudinal ligament isloaded in extension of lumbar spine and the resistance to the tensile load in flexion is providedby other ligaments.These ligaments are subject to much more tension with degeneration of theintervertebral disc so that a series of pathological changes occur.Relevant significance in clinical as-pect is also discussed.