I was reading Early Chapter 33 Amputation and Prosthetics, and there was a paragraph regarding future developments and plans of action. Here, Osseointegration was mentioned, and I had never heard of this term. So, here is an article that describes the process - basically an implant is inserted into the bone of the residual limb. The prosthetic can be attached to this and a socket is not needed. This article talks about the benefits and drawbacks.