20 ANNI DI ESPERIENZA CON L'ACCOPPIAMENTO ALLUMINA-ALLUMINA NELLE PROTESI D'ANCA

Description

The Authors reported investigations and results of a twenty-year experience with femoral head/socket coupling in allumina ceramic related to 248 total hip prostheses which were implanted between 1983 and 1999, and periodically controlled. At a follow-up in December 2003, 161 implants were lost and only 28 implants survived and were checked with a mean follow-up of 15.5 years (minimun 10 years,maximum 20 years). The high rate of failure, especially cup failure, was correlated to poor features of the Biodirecta prosthetic design: in particular, the alumina cup was too stiff in respect to the bone.

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