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MINERVA ORTOPEDICA E TRAUMATOLOGICA
A Journal on Orthopedics and Traumatology
BONE AND JOINT DEFORMITIES - SCIENTIFIC PAPERS 100° CONGRESS OF THE PIEMONTESE-LIGURIAN-LOMBARD SOCIETY OF ORTHOPAEDICS AND TRAUMATOLOGY (S.P.L.L.O.T.) - Pavia, June 20-21, 2003
Minerva Ortopedica e Traumatologica 2003 June;54(3):231-4
Alumina in hip arthroprosthesis: the basic facts
CeramTec AG, Medical Product Division, Roma
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During the 1970s alumina (Al2O3 - aluminum oxide) was first introduced as an alternative material for friction couplings in hip prostheses because of its resistance to wear (Table I) and its bioinert properties. Later, in 1984 and then in 1995, the introduction of ISO norms for ceramic components and the concept of conical fixation led to the high reliability today’s prostheses possess.
The BILOX ® forte system has reduced complication rates to less than 0.01%, while maintaining excellent tribologic features and wear resistance. However, the application of alumina in orthopedics is limited. The introduction of alumina alloy has overcome these limitations. All reinforcement technology studies on alumina can be applied to the new ceramic BIOLOX ® delta. Enhanced mechanical characteristics of the BIOLOX ® delta allow an increase in acceptable stress levels within the ceramic components. This provides wider possibilities and variety in component design. The limits of thickness, diameter and shape can now be redefined, thus permitting new applications of the ceramic in arthroprostheses of the knee and small joints.