title: Risk Factors for Subsidence of a Modular Tapered Femoral Stem Used for Revision Total Hip Arthroplasty.
abstract: The purpose of this study was to determine the incidence, and the clinical and radiographic risk factors for significant subsidence of a cementless, modular tapered revision femoral stem. Femoral stem subsidence of at least 10 mm or subsidence requiring revision was considered significant subsidence. Ninety-seven patients (99 hips) were included with minimum radiographic follow-up of one year (mean 34 months; range, 12-91 months). The mean stem subsidence was 4.5 mm (range, 0-44 mm). Fourteen out of 99 (14.1%) stems had significant subsidence and 6 (6.1%) stems required revision due to subsidence. Patient weight greater than 80 kg (P=0.04) and femoral stem press-fit distance of less than 2 cm (P<0.01) were both independent risk factors for significant stem subsidence.
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Suksan
authors.initials: S
authors.lastname: Tangsataporn
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Oleg A
authors.initials: OA
authors.lastname: Safir
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Alexander D
authors.initials: AD
authors.lastname: Vincent
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Hesham
authors.initials: H
authors.lastname: Abdelbary
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Allan E
authors.initials: AE
authors.lastname: Gross
authors.affiliation: Mount Sinai Hospital, Toronto, Ontario, Canada; University of Toronto, Division of Orthopaedic Surgery, Department of Surgery, Toronto, Ontario, Canada.
authors.forename: Paul R T
authors.initials: PR
authors.lastname: Kuzyk
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D005260:Female; D005269:Femur / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation / Q000009:adverse effects*; D012189:Retrospective Studies; D012307:Risk Factors
keywords: arthroplasty; hip; revision; subsidence; taper-stem