Document Detail

Two-year radiostereometric analysis evaluation of femoral head penetration in a challenging population of young total hip arthroplasty patients.
MedLine Citation:
PMID:  19698909     Owner:  NLM     Status:  MEDLINE    
This prospective, randomized protocol evaluated femoral head penetration after total hip arthroplasty in a young population. Forty-five patients randomly received either a cross-linked or conventional ultrahigh-molecular-weight polyethylene (UHMWPE) liner in a noncemented hemispheric cup (Trilogy, Zimmer, Warsaw, Ind) with a 28-mm femoral head. Radiostereometric analysis film pairs, Harris hip, UCLA, SF-12, and Western Ontario and McMaster Universities scores were obtained through 2 years. Median femoral head penetration was less among cross-linked compared to conventional liners as follows: 0.06 mm (0.04-0.08 mm) vs 0.08 mm (0.02-0.19 mm) at 6 months, 0.07 mm (-0.14 to 0.16 mm) vs 0.11 mm (0.01-0.27 mm) at 1 year, and 0.065 mm (-0.04 to 0.193 mm) vs 0.169 mm (0.09-0.22 mm) at 2 years. Clinical outcomes were similar between the groups. Highly cross-linked UHMWPE demonstrated 55% less femoral head penetration compared to conventional polyethylene at 2 years. Despite improvements in the manufacturing process and sterilization of conventional UHMWPE, the femoral head penetration rate is unchanged from historical standards.
David C Ayers; Peyton L Hays; Jacob M Drew; Mark S Eskander; Daniel Osuch; Charles R Bragdon
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of arthroplasty     Volume:  24     ISSN:  1532-8406     ISO Abbreviation:  J Arthroplasty     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-08-24     Completed Date:  2010-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703515     Medline TA:  J Arthroplasty     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9-14     Citation Subset:  IM    
Department of Orthopedic Surgery and Physical Rehabilitation, University of Massachusetts Medical School, Worcester, Massachusetts 01605-2982, USA.
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MeSH Terms
Arthroplasty, Replacement, Hip / instrumentation*,  methods*
Femur Head / radiography*
Femur Head Necrosis / surgery
Middle Aged
Osteoarthritis, Hip / surgery
Prospective Studies
Prosthesis Failure*
Time Factors
Treatment Outcome
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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