Long bone resurfacing bone lock

A modular joint implant assembly comprising:

• a base component having first and second opposing ends, the first end defining a first anchor for engagement with an aperture defined in a resected long bone, and the second end defining a second anchor;
• and
• a head component defining at least one retaining feature configured to couple to the second anchor of the base component,
• wherein the first anchor defines at least one locking feature configured to engage an interior of the resected long bone upon rotation of the base component, thereby locking the base component to the long bone.

A method of locking an implant to a long bone structure, the method comprising:

• excising a defective end of the long bone;
• cutting a transverse slot in the long bone distally extending a distance from a resection line;
• inserting a stem and anchor portion of the implant through the slot from a side of the long bone;
• rotating the implant and locking the anchor to an interior of the long bone.