title: Common errors in the execution of preoperative templating for primary total hip arthroplasty.
abstract: We reviewed 75 primary total hip arthroplasty preoperative and postoperative radiographs and recorded limb length discrepancy, change in femoral offset, acetabular position, neck cut, and femoral component positioning. Interobturator line, as a technique to measure preoperative limb length discrepancy, had the least amount of variance when compared with interteardrop and intertuberosity lines (Levene test, P = .0527). The most common error in execution of preoperative templating was excessive limb lengthening (mean, 3.52 mm), primarily due to inferior acetabular cup positioning (Pearson correlation coefficient, P = .036). Incomplete medialization of the acetabular component contributed the most to offset discrepancy. The most common errors in the execution of preoperative templating resulted in excessive limb lengthening and increased offset. Identifying these errors can lead to more accurate templating techniques and improved intraoperative execution.
authors.affiliation: University of New Mexico Health Sciences Center, Department of Orthopaedic Surgery, Albuquerque, New Mexico, USA.
authors.forename: Krishna R
authors.initials: KR
authors.lastname: Tripuraneni
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Archibeck
authors.forename: Daniel W
authors.initials: DW
authors.lastname: Junick
authors.forename: Joshua T
authors.initials: JT
authors.lastname: Carothers
authors.forename: Rick E
authors.initials: RE
authors.lastname: White
mesh_terms: D001172:Arthritis, Rheumatoid / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging; D005271:Femur Head Necrosis / Q000601:surgery; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D016014:Linear Models; D008297:Male; D015207:Osteoarthritis, Hip / Q000601:surgery; D011300:Preoperative Care / Q000379:methods*; D011859:Radiography; D012189:Retrospective Studies