Orthopaedic bearing and method for making the same

An implantable orthopaedic bearing, comprising:

• a metallic component,
• a first layer of polyethylene molded to the metallic component, the first layer of polyethylene being crosslinked to a first degree, and
• a second layer of polyethylene having a first side and a second side, said first side of the second layer of polyethylene molded to the first layer of polyethylene along a melt-fused interface that is devoid of mechanical interdigitation or interlocking, the second layer of polyethylene being crosslinked to a second degree that is different than the first degree, wherein said second side of the second layer of polyethylene has an articulating surface defined therein.

An implantable, one-piece glenoid bearing, comprising:

• a metallic component,
• a non-crosslinked layer of polyethylene molded to the metallic component, and
• a gamma irradiated crosslinked layer of polyethylene having a first side and a second side, said first side of the crosslinked layer of polyethylene molded to the non-crosslinked layer of polyethylene along a melt-fused interface that is devoid of mechanical interdigitation or interlocking, wherein said second side of the crosslinked layer of polyethylene has an articulating surface defined therein.