Document Detail

Incidence and Natural Course of Initial Polar Gaps in Birmingham Hip Resurfacing Cups.
MedLine Citation:
PMID:  22503330     Owner:  NLM     Status:  Publisher    
The purpose of this study was to retrospectively investigate the incidence of initial polar gaps and their effect on clinical results in Birmingham Hip Resurfacing cups. A total of 151 hips in 134 patients who underwent hip resurfacing at a mean age of 50 years were examined. The mean follow-up period was 7 years. A polar gap was identified in 47 hips (31%) with a mean width of 2.1 mm. Gaps of 2 mm or more were identified in 21 hips, 6 of which showed reductions in cup inclination during the initial 3 months. After 3 months, no progressive cup migration was observed. There was no cup revision. All gaps were filled with bone within 2 years of surgery. The initial polar gaps had no significant influence on the stability of hydroxyapatite-coated Porocast cobalt-chromium hemispherical monoblock cups (Midland Medical Technologies Ltd, Birmingham, UK), although gaps of 2 mm or more had a higher risk of early migration.
Satoshi Nakasone; Masaki Takao; Takashi Nishii; Takashi Sakai; Nobuhiko Sugano
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-11
Journal Detail:
Title:  The Journal of arthroplasty     Volume:  -     ISSN:  1532-8406     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703515     Medline TA:  J Arthroplasty     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Inc. All rights reserved.
Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
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