title: The use of the posterior lesser trochanter line to estimate femoral neck version: an analysis of computed tomography measurements.
abstract: We hypothesized that the lesser trochanter could be a useful guide for estimating femoral component version during total hip arthroplasty. We conducted a study of 88 patients to evaluate the relationship between the posterior lesser trochanter line (PLTL) and the femoral neck axis (FNA) using computed tomographic scans. The mean angle between the PLTL and the FNA was 17.4° ± 7.1° (range, -1.6° to 36.5°). The PLTL angle correlated (r(2) = 0.67-0.72) with the FNA angle. Intraclass correlation coefficient values showed a high level of intraobserver and interobserver agreement in the angles between the PLTL and the FNA. We found a constant relationship between the lesser trochanter and the FNA, and femoral neck version can be estimated, using the PLTL, with reasonable reliability.
authors.affiliation: Department of Orthopaedic Surgery, Guro Hospital, Korea University School of Medicine, Seoul, South Korea.
authors.forename: Won Yong
authors.initials: WY
authors.lastname: Shon
authors.forename: Ho Hyun
authors.initials: HH
authors.lastname: Yun
authors.forename: Jae-Hyuk
authors.initials: JH
authors.lastname: Yang
authors.forename: Seung Yeop
authors.initials: SY
authors.lastname: Song
authors.forename: Sung Bum
authors.initials: SB
authors.lastname: Park
authors.forename: Jee Wun
authors.initials: JW
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods; D005260:Female; D005264:Femoral Fractures / Q000000981:diagnostic imaging*; D005269:Femur / Q000000981:diagnostic imaging*; D005272:Femur Neck / Q000000981:diagnostic imaging; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture; D014057:Tomography, X-Ray Computed