title: Load-transfer analysis after insertion of cementless anatomical femoral stem using pre- and post-operative CT images based patient-specific finite element analysis.
abstract: Periprosthetic bone remodeling is commonly seen after total hip arthroplasty, but the remodeling pattern differs among patients even in those implanted with the same stem. Remodeling occurs mainly because of the difference in load transmitted from the stem to the femur. In this study, we evaluated the load-transfer pattern in eight female patients implanted with an anatomical stem on an individual basis by patient-specific finite element analysis that is based on pre- and postoperative computed tomography images. Load transfer was evaluated using interface stress between the stem and bone. One of eight patients demonstrated proximal dominant load transfer, while the other patients demonstrated a distal dominant pattern. The results of our biomechanical simulations reveal the differences in load-transfer pattern after surgery among patients with the same anatomical stem.
authors.affiliation: Organization for Promotion of Tenure Track, University of Miyazaki, Miyazaki, Japan. Electronic address: g.yamako@cc.miyazaki-u.ac.jp.
authors.forename: Go
authors.initials: G
authors.lastname: Yamako
authors.affiliation: Division of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
authors.forename: Etsuo
authors.initials: E
authors.lastname: Chosa
authors.affiliation: Department of Orthopedics, The Second Hospital, Jilin University, Jilin, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Division of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Totoribe
authors.affiliation: Division of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: Division of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
authors.forename: Takero
authors.initials: T
authors.lastname: Sakamoto
authors.affiliation: Department of Orthopaedic Surgery, Kumamoto-kinoh Hospital, Kumamoto, Japan.
authors.forename: Nobutake
authors.initials: N
authors.lastname: Nakane
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation; D001696:Biomechanical Phenomena; D015519:Bone Density; D016723:Bone Remodeling / Q000502:physiology*; D003198:Computer Simulation; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D020342:Finite Element Analysis; D006622:Hip Prosthesis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008875:Middle Aged; D008954:Models, Biological; D009068:Movement / Q000502:physiology; D013314:Stress, Mechanical; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016474:Weight-Bearing
keywords: Bone remodeling; Femoral stem; Load transfer; Stress shielding; Total hip arthroplasty