Failure of HA coating on a gritblasted acetabular cup: 155 patients followed for 7-10 years

We report the outcome of 191 acetabular gritblasted titanium cups with a hemispherical design for press-fit insertion and coated with hydroxyapatite. The prosthesis was made of gritblasted titanium entirely coated with hydroxyapatite. 155 patients aged 15-78 years were operated on during the years 1...

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Bibliographic Details
Published in:Acta orthopaedica 2002, Vol.73 (1), p.104-108
Main Authors: Reikerås, Olav, Gunderson, Ragnhild B
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Arthroplasty, Replacement, Hip - instrumentation
Arthroplasty, Replacement, Hip - methods
Biological and medical sciences
Coated Materials, Biocompatible
Confidence Intervals
Female
Follow-Up Studies
Hip Prosthesis
Humans
Male
Medical sciences
Middle Aged
Odds Ratio
Orthopedic surgery
Probability
Proportional Hazards Models
Prosthesis Design
Prosthesis Failure
Reoperation
Retrospective Studies
Risk Assessment
Risk Factors
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Time Factors
Titanium
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Summary:We report the outcome of 191 acetabular gritblasted titanium cups with a hemispherical design for press-fit insertion and coated with hydroxyapatite. The prosthesis was made of gritblasted titanium entirely coated with hydroxyapatite. 155 patients aged 15-78 years were operated on during the years 1991-1993 and followed for 7-10 years. During this period, 39 cups were revised because of mechanical loosening, a further 9 had radiolucent lines and 2 focal osteolysis. None of these 11 patients had clinical symptoms. Failure was associated with age, wear and radiolucency/osteolysis. At revision, we found that the soft tissues were discolored, and that most of the coating had disappeared. This design of hydroxyapatite-coated cups has a high rate of debonding and failure.
ISSN:1745-3674
0001-6470
1745-3682
DOI:10.1080/000164702317281503