Document Detail

Late dissociation of an alumina-on-alumina bearing modular acetabular component.
MedLine Citation:
PMID:  15284989     Owner:  NLM     Status:  MEDLINE    
Alumina-on-alumina bearings for total hip arthroplasty have been introduced as a promising alternative to reduce wear debris and to increase the life expectancy of the prosthesis. We report a case of a late dissociation of an alumina-on-alumina bearing modular acetabular component, which occurred 2 years, 8 months after surgery. Detailed analysis of the retrieved prosthesis suggested that the cause of the failure may be strong rotational torque developed by a roughening of the bearing's alumina surface caused by edge loading (microseparation). The strong friction torque in articulation may explain the higher reported rate of mechanical loosening of the acetabular component in alumina-on-alumina bearing total hip prostheses.
Masao Akagi; Tohgo Nonaka; Fumiaki Nishisaka; Shigeshi Mori; Kanji Fukuda; Chiaki Hamanishi
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  The Journal of arthroplasty     Volume:  19     ISSN:  0883-5403     ISO Abbreviation:  J Arthroplasty     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-07-30     Completed Date:  2004-12-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703515     Medline TA:  J Arthroplasty     Country:  United States    
Other Details:
Languages:  eng     Pagination:  647-51     Citation Subset:  IM    
Department of Orthopaedic Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland.
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MeSH Terms
Acetabulum* / radiography
Aluminum Oxide*
Hip Prosthesis*
Middle Aged
Prosthesis Failure
Surface Properties
Reg. No./Substance:
1344-28-1/Aluminum Oxide

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

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