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 s...

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Bibliographic Details
Published in:The Journal of arthroplasty 2015-06, Vol.30 (6), p.1030-1034
Main Authors: Tangsataporn, Suksan, MD, Safir, Oleg A., MD, MEd, FRCSC, Vincent, Alexander D., BSc, Abdelbary, Hesham, MD, Gross, Allan E., MD, FRCSC, Kuzyk, Paul R.T., MD, MASc, FRCSC
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
arthroplasty
Arthroplasty, Replacement, Hip - adverse effects
Female
Femur - surgery
hip
Hip Prosthesis
Humans
Incidence
Male
Middle Aged
Orthopedics
Prosthesis Design
Reoperation - adverse effects
Retrospective Studies
revision
Risk Factors
subsidence
taper-stem
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Summary: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.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2015.01.009