title: A Useful Anatomical Reference Guide for Stem Anteversion during Total Hip Arthroplasty in the Dysplastic Hip.
abstract: Computed tomography scans of 50 dysplastic hips were obtained and reconstructed using preoperative planning software for total hip arthroplasty. The anteversion of the stem implanted parallel to the line connecting the trochanteric fossa and the middle of the medial cortex of the femoral neck (T line) was measured. The cutting heights of 5mm and 10mm above the lesser trochanter were simulated. The mean difference of the anteversion of the stem using the T line and the native femoral anteversion was 2.7° (95% CI: 1.0°-4.5°) and 3.5° (95% CI: 1.5°-5.5°) at cutting heights of 5mm and 10mm respectively. An anteversion using a T line is compatible with native femoral anteversion even in developmental dysplasia of the hip.
authors: Department of Orthopaedic Surgery, Chiba Rehabilitation Center, Japan.
authors: Tadashi
authors: T
authors: Tsukeoka
authors: Department of Orthopaedic Surgery, Chiba Rehabilitation Center, Japan.
authors: Yoshikazu
authors: Y
authors: Tsuneizumi
authors: Department of Orthopaedic Surgery, Chiba Rehabilitation Center, Japan.
authors: Tae Hyun
authors: TH
authors: Lee
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods* / Q000592:standards*; D003198:Computer Simulation; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D005272:Femur Neck / Q000000981:diagnostic imaging / Q000601:surgery*; D006618:Hip Dislocation, Congenital / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D015588:Observer Variation; D015203:Reproducibility of Results; D012984:Software; D014057:Tomography, X-Ray Computed
keywords: computer simulation; developmental dysplasia of the hip; landmark; stem anteversion; total hip arthroplasty