Thin Hard Crest on the Edge of Ceramic Acetabular Liners Accelerates Wear in Edge Loading

Thin Hard Crest on the Edge of Ceramic Acetabular Liners Accelerates Wear in Edge Loading

Abstract Ceramic acetabular liners may exhibit a small, sharp crest—an artifact of discontinuous machining steps—at the junction between the concave spherical surface and the interior edge. On 3 ceramic liners, this crest was found to form a 9° to 11° deviation from tangency. Edge loading wear tests...

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Veröffentlicht in:The Journal of arthroplasty 2012-01, Vol.27 (1), p.150-152
Hauptverfasser: Sanders, Anthony P., MS, Dudhiya, Parth J., BTech, Brannon, Rebecca M., PhD
Format: Artikel
Sprache:eng
Schlagworte:
Acetabulum
ceramic-on-ceramic
Ceramics
edge loading
Hip Prosthesis
Materials Testing
Orthopedics
Prosthesis Design
Prosthesis Failure
surface profilometry
Surface Properties
Time Factors
total hip arthroplasty
wear
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Zusammenfassung:Abstract Ceramic acetabular liners may exhibit a small, sharp crest—an artifact of discontinuous machining steps—at the junction between the concave spherical surface and the interior edge. On 3 ceramic liners, this crest was found to form a 9° to 11° deviation from tangency. Edge loading wear tests were conducted directly on this crest and on a smoother region of the edge. The crest elicited 2 to 15 times greater volumetric wear on the femoral head. The propensity of the crest to rapidly (
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2011.08.012