Surgical Implant The present invention relates to a surgical implant comprising: a substrate having an outer surface and a plurality of layers disposed on the outer surface of the substrate. the substrate comprises a polymeric material and the plurality of layers comprises: an activated substrate surface layer; a valve metal layer; and a porous valve metal oxide layer, wherein the valve metal layer is disposed between the activated substrate layer and the porous valve metal oxide layer. The description provides a method for producing a polymeric surgical implant. the outer substrate surface is treated by one or more processes comprising: plasma activation; electron beam irradiation; UV light; and low energy air + ion beam irradiation; produce an activated substrate surface layer. a plurality of layers are applied over the activated substrate surface layer. The surface is converted by a spark anodizing process into an alkaline bath containing Ca and P ions into a valve metal oxide layer.
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