Monolithic composite orthopedic implants and associated methods

An implant, comprising:

• a monolithic femoral head having:
• a first region formed from a first metal alloy;
• a second region formed from a second metal alloy and comprising a core and an articulating surface;
• and
• a transition region disposed between the first region and the second region, wherein the transition region comprises a sintered mixture of the first metal alloy and the second metal alloy, wherein the transition region defines an interlocked geometry between the first region and the second region, and wherein the transition region circumscribes a three-dimensional shape having a keyhole-shaped cross-section such that an outer boundary of the first region is interlocked with a complementary inner boundary of the second region.

An implant, comprising:

• a monolithic femoral head having:
• a first region formed from a first metal alloy;
• a second region formed from a second metal alloy and comprising a core and an articulating surface;
• and
• a transition region disposed between the first region and the second region, wherein the transition region comprises a sintered mixture of the first metal alloy and the second metal alloy, wherein the transition region defines an interlocked geometry between the first region and the second region, and wherein the transition region is shaped such that an outer boundary of the first region circumscribes a polyhedron that is interlocked with an inner boundary of the second region that defines a mating polyhedron.