title: Estimation of dislocation after total hip arthroplasty by 4-dimensional.
abstract: We constructed a 4-dimensional musculoskeletal model for patients who have undergone total hip arthroplasty (THA), which aimed to simulate the movement of the patient's inner body structure and estimate the complications that can arise with THA. The model reflects patient-specific characteristics of the bone geometry, implant alignment and hip movement. In order to estimate the direction of the muscle force and the length of the muscles, we developed a string-type muscle model that represents the route of the muscles. The strings expand and contract according to the movement of the origin and insertion location of the muscle. We developed models for the seven muscles related to movement of the hip joint. By using this model, clinicians will be able to predict the possibility of dislocation or recognize the actual causes of dislocation, as well as any possible influences the muscle may have on dislocation.
authors.affiliation: Institute for High Dimensional Medical Imaging, Jikei University School of Medicine 4-11-1, Izumi Honcho, Komae-shi, Tokyo, Japan.
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Otake
authors.forename: Naoki
authors.initials: N
authors.lastname: Suzuki
authors.forename: Asaki
authors.initials: A
authors.lastname: Hattori
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Miki
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Yamamura
authors.forename: Nobuo
authors.initials: N
authors.lastname: Nakamura
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yonenobu
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ochi
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D003952:Diagnostic Imaging / Q000379:methods*; D006617:Hip Dislocation / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography