title: The accuracy and reliability of preoperative templating for metal-on-metal hip resurfacing.
abstract: The purposes of this study were to evaluate the accuracy and reliability of preoperative templating on conventional radiographs (CRs) for metal-on-metal hip resurfacing and to determine the factors affecting the accuracy. Four observers templated 80 CRs on 2 separate occasions in a blinded fashion. Eight independent variables were evaluated to investigate their effect on the accuracy of templating. The overall accuracy of templating within one size of the actual component was 80.6% for the femoral component and 98.5% for the acetabular component. Overall, the intraobserver and interobserver reliability was fair to substantial (κ = 0.22-0.61). Using multiple regression analysis, surgical time was the only factor that affected the accuracy of predicting the size of the acetabular component (P = .019). We conclude that CR templating for metal-on-metal hip resurfacing is a useful method for preoperative planning of the sizes of the respective implants and that surgeon experience does play a significant role in the accuracy of predicting component size during templating.
authors.affiliation: Center for Hip & Knee Replacement (CHKR), New York-Presbyterian Hospital at Columbia University, New York, New York 10032, USA.
authors.forename: Jung Keun
authors.initials: JK
authors.lastname: Choi
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Geller
authors.forename: Wenbao
authors.initials: W
authors.lastname: Wang
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Nyce
authors.forename: William
authors.initials: W
authors.lastname: Macaulay
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D015588:Observer Variation; D015207:Osteoarthritis, Hip / Q000601:surgery*; D057234:Preoperative Period; D011474:Prosthesis Design / Q000379:methods*; D017755:Prosthesis Fitting / Q000379:methods*; D011859:Radiography; D012044:Regression Analysis; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D008670:Metals