Abstract
Ceramics are used in hip prostheses in approximately 40% of the implants (ce/ce and ce/pe). The increase of the diameters (32 and 36 mm) in order to improve the stability and the Range of Motion of the prostheses is now the topic. Research and development has allowed creating new alumina inserts with smaller out diameter (39 mm for the 32 mm bearing and of 44 mm for the 36 mm ones). The new alumina matrix composite has allowed the realization of ceramic revision ball-heads. This system, made of 28 or 32 mm ball-heads with a titanium slivers (12714 internal cone), will allow applications of the ceramic ball-head on an in situ damaged taper. Beyond S, M and L lengths, will be available also an XL version. A femoral knee component, still in phase of study, has shown advanced resistances of 5, 8 and 15 times the body-weight in different load configurations. Have been carry out some tests in order to estimate the adhesion between the ceramic and the cement of different thickness and have been caught up values of 6,17 MPa (2 mm) and 14,90 MPa (0,7mm).
Correspondence should be addressed to Ariella Neustadt at Studio EGA, Professional Congress Organisers, Viale Tiziano, 19 - 00196, Rome - Italy.
