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Early Follow-up for a Hybrid Total Hip Arthroplasty Using a Metal-Backed Acetabular Component Designed to Reduce “Backside” Polyethylene Wear

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HSS Journal

Abstract

Modular acetabular systems have several advantages; however, increased polyethylene wear has been recognized as a disadvantage. In our study, an acetabular shell design with a highly polished inner surface, a locking mechanism that minimizes micromotion, and a high polyethylene liner to shell conformity was evaluated. A prospective cohort of 50 consecutive hips was followed up for a mean of 3.6 years (range, 2–7 years). One patient required an early revision for recurrent instability. Mean linear head penetration rates were 0.242 mm/year (range, 0.048–0.655 mm/year). The true linear wear rate was calculated after subtracting the linear wear in the first follow-up year from the total wear at the end of the follow-up. The true linear wear rate was 0.173 mm/year (range, 0.03–0.423 mm/year). A positive correlation was found between wear rate and male gender. The low head penetration rates suggest that a polished liner with an improved locking mechanism and increased liner conformity can reduce polyethylene wear.

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Authors and Affiliations

  1. Shiley Center for Orthopaedic Research and Education at Scripps Clinic, 11025 North Torrey Pines Road, Suite 140, La Jolla, CA, 92037, USA

    Colin E. Poole MD, Shantanu S. Patil MD, Darryl D. D’Lima MD & Clifford W. Colwell Jr MD

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  1. Colin E. Poole MD
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  2. Shantanu S. Patil MD
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  3. Darryl D. D’Lima MD
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  4. Clifford W. Colwell Jr MD
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Correspondence to Clifford W. Colwell Jr MD.

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Poole, C.E., Patil, S.S., D’Lima, D.D. et al. Early Follow-up for a Hybrid Total Hip Arthroplasty Using a Metal-Backed Acetabular Component Designed to Reduce “Backside” Polyethylene Wear. HSS Jrnl 1, 31–34 (2005). https://doi.org/10.1007/s11420-005-0102-6

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  • DOI: https://doi.org/10.1007/s11420-005-0102-6

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