中国组织工程研究与临床康复2011，Vol.15Issue(22)：3991-3994,4.DOI:10.3969/j.issn.1673-8225.2011.22.001
正常步态下髋臼底接触面积与压力分布的三维有限元分析
Three-dimensional finite analysis of hip contact area and contact pressure during normal walking
摘要
Abstract
BACKGROUND: Estimation of the hip joint contact area and pressure distribution during activities of daily living is important in predicting joint degeneration mechanism, prosthetic implant wear, providing biomechanical rationales for preoperative planning and postoperative rehabilitation.OBJECTIVE: To explore the hip joint contact area and pressure distribution during different trait phases, which is important in predicting joint degeneration mechanism.METHODS: CT scanning and computer image processing system were used to establish the model to simulate the situation of acetabulum for 32 phases during the trait. A finite element solves was used to calculate stress and contact area. RESULTS AND CONCLUSION: Stress distribution within the acetabular cartilage was obtained and regions with elevated stress at 32 phases were located. The stress distributions of 32 phases were significantly different. The stress demonstrated the bimodal shape of a pronounced phush-off often seen in trial gait cycle (4.2 MPa). The regions of elevated stress and contact area of acetabulum both occurred during stance phases of a gait cycle. Persistent stress-transfer located on medial roof, while on anterior and posterior horn there is always no stress-transfer. The elevated stress located roof during stance phases and medial acetabular cartilage during swing-phases respectively. These results can be used to rationalize rehabilitation protocols, functional restrictions after complex acetabular reconstructions, the renions of elevated stress and contact area of acetabulum are important, which provide an insight into the factors contribution to the arthritis.关键词
髋臼接触面积/接触压/三维有限元/髋关节磨损/生物力学分类
医药卫生引用本文复制引用
汪光晔,张春才,许硕贵..正常步态下髋臼底接触面积与压力分布的三维有限元分析[J].中国组织工程研究与临床康复,2011,15(22):3991-3994,4.基金项目
上海科学技术委员会科研计划项目(03JC140087). （03JC140087）
