A device comprises:an orthopedic joint implant comprising a polyurethane IPN or polyurethane semi-IPN; anda urethane dimethacrylate-methyl methacrylate copolymer attached to the polyurethane IPN or polyurethane semi-IPN, the urethane dimethacrylate-methyl methacrylate copolymer comprising a plurality of first polymer regions based on urethane dimethacrylate and a plurality of second polymer regions based on methyl methacrylate, wherein the plurality of first polymer regions based on urethane dimethacrylate comprises a plurality of hard segments and soft segments.