中国组织工程研究2012，Vol.16Issue(9)：1613-1617,5.DOI:10.3969/j.issn.1673-8225.2012.09.022
三叉形股骨膨胀式空心加压螺钉的研制及生物力学分析
Design and biomechanical analysis of trigeminal form expansion hollow compression screw
摘要
Abstract
BACKGROUND: Traditional fixation device for femoral neck fracture can cause screw loosening, extraction and higher failurerate when fixation device on bone-screw interface with insufficient grasping force or bearing load too large.OBJECTIVE: To develop and evaluate biomechanical characteristics of the trigeminal form expansion hollow compressionscrew.METHODS: Based on the special biomechanical characteristics of the femoral neck fracture, the trigeminal form expansionhollow compression screw was designed, which was composed of two parts: hollow nail and inside plug which could be screwedinto the channel of the hollow nail. Within the bolt screwed through the nail produced pressure effect. Then AO cannulated screwby anti-axial compression was made as control. Axial compression test, three-point bending test and maximal axial pulloutstrength test were detected respectively.RESULTS AND CONCLUSION: Under 300 N axial or bending external force, axial compression stiffness and bending stiffnessin the experimental group were higher than those of the control group (P < 0.05), but axial displacement and radial degree in theexperimental group were lower than those of the control group (P < 0.05). The maximal axial pullout strength of the experimentalgroup was higher than that of the control group (P < 0.05). It is indicated that trigeminal form expansive hollow compression screwis significantly superior to AO cannulated screw in fixation firmly and biomechanical properties. Trigeminal form expansive hollowcompression screw has good performance in anti-axial compression, anti-bend, anti-torsion and anti-pullout which is theadvantage that AO cannulated screw does not have.关键词
三叉形膨胀式空心加压螺钉/股骨颈骨折/普通AO空心螺钉/生物力学/骨科植入物分类
医药卫生引用本文复制引用
尹一然,陈歌,鲁晓波,徐杨博,叶里子..三叉形股骨膨胀式空心加压螺钉的研制及生物力学分析[J].中国组织工程研究,2012,16(9):1613-1617,5.基金项目
四川省实验课题基金项目(09081),课题名称:膨胀式空心加压螺钉的研制与生物力学研究. （09081）
