The implants were both custom-made to fit into holes drilled into Oscar's ankle bones. They are known as intraosseous transcutaneous amputation prosthetics (ITAPs)...

They have a honeycomb structure which enables skin to bond with the implant to prevent infection. The implants are placed into the drilled holes which then allow for a "sock" to be fitted over them.

The ITAP technology is currently being tested on humans

So glad the little guy got a new lease on life, and it's leading to future research 🥹

mecha-muffin lives! (and is adorable!)