Patent ID: 8012590

Claim:
A multilayer article comprising, a metal substrate, a first layer comprising an inner and outer surface, said first layer comprising a glass composition, a first intermediate layer having an inner and outer surface, and said first intermediate layer is located between the substrate and the first layer, said first intermediate layer comprises a glass composition, wherein each said glass composition comprises, 44.2 to 67.7 wt % SiO2, 10.1 to 23.4 wt % CaO, 5.7 to 13.3 wt % MgO, 10.3 to 23.6 wt % Na 2 O, 2.2 to 6.5 wt % K 2 O and 6.0 wt % P 2 O 5 , and contains hydroxyapatite particles in an amount of up to 50 wt %.