南方医科大学学报2012，Vol.32Issue(11)：1588-1591,4.DOI:10.3969/j.issn.1673-4254.2012.11.013
双螺钉内固定行距下关节融合后初稳性的三维有限元分析
Finite element analysis of the initial stability of subtalar arthrodesis with double-screw fixation
摘要
Abstract
Objective To assess the optimal configuration of double-screw fixation for subtalar arthrodesis using finite element analysis. Methods Three-dimensional finite element double-screw models of subtalar arthrodesis were reconstructed using Mimicsl3.0, Geomagic10.0 and solidworks software based on the 3-D images of the volunteer's right foot. The external and internal rotation torques of 4 N·m were applied, and the micromotions at the bone-to-bone interface were measured to evaluate the initial stability of subtalar arthrodisis. Results A neck screw plus an anterolateral dome screw was the most stable model. The peak micromotions at the fusion site of this fixation configuration were 41.67±0.49 and 42.64±0.75 urn in response to the respectively. A neck screw plus a posteromedial dome screw was the least stable model, with peak micromotions at the bone-to-bone interface of 61.76±1.00 and 62.32±0.90 μm, respectively. Conclusion A neck screw plus an anterolateral dome screw is the best fixation configuration while a neck screw plus a posteromedial screw provides the least stability of subtalar arthrodesis. Three-dimensional finite element models allow effective preoperative planning of the screw number and placement.关键词
内固定/距下关节融合/初稳性/有限元分析Key words
internal fixation/ subtalar arthrodesis/ initial stability/ finite element analysis分类
医药卫生引用本文复制引用
崔壮,余斌,李雪,许长鹏,宋锦旗,欧阳汉斌,刁喜才,陈丽光..双螺钉内固定行距下关节融合后初稳性的三维有限元分析[J].南方医科大学学报,2012,32(11):1588-1591,4.基金项目
国家自然科学基金(81071233) （81071233）
