The predicates are Biolox the reference femoral head is Coorstek. They effectively compared their Alumina Matrix Composite and established it to be substantially equivalent to Ceramtek Biolox & Coorstek Cerasurf. However the femoral head is still Alumina Matrix and not ZTA; devices are very similar as AMC are about ~15% Zirconia vs ~ZTA 25%. Still different products and it allows Zimmer to market the femoral head as their own.
You can find a recent study on AMC liners done by Pezzotti here:
Pretty smart of coorstek if I`m right to offer the same product as your closest competition in ceramic medical material for cheaper then blow your own product out of the water. Would set coorstek up to dominate. Can't prove it but the infringement lawsuits on biolox? is that a prong in this multi pronged attack? Been awhile since I mentioned that so here's a reminder taste.
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