Influence of screw length and diameter on tibial strain energy density distribution after anterior cruciate ligament reconstruction

作     者：Jie Yao Guan-Ming Kuang Duo Wai-Chi Wong Wen-Xin Niu Ming Zhang Yu-Bo Fan 

作者机构：Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering/National Key Lab of Virtual Reality TechnologyBeihang University Interdisciplinary Division of Biomedical EngineeringFaculty of EngineeringThe Hong Kong Polytechnic University Shenzhen Key Laboratory for Innovative Technology in Orthopaedic TraumaDepartment of Orthopaedics and TraumatologyThe University of Hong Kong-Shenzhen Hospital The University of Hong Kong Tongji University School of Medicine 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2014年第30卷第2期

页      面：241-249页

核心收录：

学科分类：1002[医学-临床医学] 100210[医学-外科学(含：普外、骨外、泌尿外、胸心外、神外、整形、烧伤、野战外)] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 10[医学] 

基　　金：supported by the National Science & Technology Pillar Program of China(2012BAI18B07 and 2012BAI22B02) the National Natural Science Foundation of China(10925208 and 11120101001) the National Key Lab of Virtual Reality Technology 

主　　题：Anterior crucial ligament reconstruction Strain energy density Screw length Screw diameter 

摘      要：Postoperative tunnel enlargement has been frequently reported after anterior cruciate ligament（ACL）*** screw,as a surgical implant in ACL reconstruction,may influence natural loading transmission and contribute to tunnel *** aims of this study are（1）to quantify the alteration of strain energy density（SED）distribution after the anatomic single-bundle ACL reconstruction;and（2）to characterize the influence of screw length and diameter on the degree of the SED alteration.A validated finite element model of human knee joint was *** screw length ranging from 20 to 30 mm with screw diameter ranging from 7 to 9 mm were *** the post-operative knee,the SED increased steeply at the extra-articular tunnel aperture under compressive and complex loadings,whereas the SED decreased beneath the screw shaft and nearby the intra-articular tunnel *** the screw length could lower the SED deprivation in the proximal part of the bone tunnel;whereas increasing either screw length or diameter could aggravate the SED deprivation in the distal part of the bone *** the elastic modulus of the screw could lower the bone SED deprivation around the *** consideration of both graft stability and SED alteration,a biodegradable interference screw with a long length is recommended,which could provide a beneficial mechanical environment at the distal part of the tunnel,and meanwhile decrease the bone-graft motion and synovial fluid propagation at the proximal part of the *** findings together with the clinical and histological factors could help to improve surgical outcome,and serve as a preliminary knowledge for the following study of biodegradable interference screw.