title: Finite element prediction of contact pressures in cam-type femoroacetabular impingement with varied alpha angles.
abstract: Three dimensional finite element models of cam-type FAI with alpha angles of 60°, 70°, 80°, and 90° were created to investigate the cartilage contact mechanics in daily activities. Intra-articular cartilage contact pressures during routine daily activities were assessed and cross-compared with a normal control hip. Alpha angles and hip range of motion were found to have a combined influence on the cartilage contact mechanics in hips with cam-type FAI, thereby resulting in abnormally high pressures and driving the cartilage damage. In particular, alpha angles of 80° or greater contribute to substantial pressure increase under certain types of daily activities.
authors.affiliation: a Department of Orthopaedics, The Second Xiangya Hospital , Central South University , Changsha , P.R. China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.affiliation: a Department of Orthopaedics, The Second Xiangya Hospital , Central South University , Changsha , P.R. China.
authors.forename: Wanchun
authors.initials: W
authors.lastname: Wang
authors.affiliation: b Biomechanics Laboratory, Division of Orthopedic Research , Mayo Clinic , Rochester , MN , USA.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Thoreson
authors.affiliation: b Biomechanics Laboratory, Division of Orthopedic Research , Mayo Clinic , Rochester , MN , USA.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Zhao
authors.affiliation: a Department of Orthopaedics, The Second Xiangya Hospital , Central South University , Changsha , P.R. China.
authors.forename: Weihong
authors.initials: W
authors.lastname: Zhu
authors.affiliation: a Department of Orthopaedics, The Second Xiangya Hospital , Central South University , Changsha , P.R. China.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Dou
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D002356:Cartilage / Q000502:physiology; D005260:Female; D057925:Femoracetabular Impingement / Q000503:physiopathology*; D020342:Finite Element Analysis; D006615:Hip / Q000502:physiology; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D021621:Imaging, Three-Dimensional; D011312:Pressure; D016059:Range of Motion, Articular
keywords: Femoroacetabular impingement; alpha angle; contact pressures; finite element model