failed MP joint replacement surgery

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I had a total joint replacement for hallux rigidus in 2003 that is now failing. The metal in the toe is apparently lose and has led to significant bone loss in the proximal phalange. The hardware in the toe will have to be removed. But there won't be enough bone left to put another metal prosthesis in. The hardware in the metatarsal seems fine at this time. I am athletic and I love to dance (recreational). I don't want to give up my active life (I can't even imagine it, to be frank), so a fusion looks very unpalatable. I came across some references to new surgeries that involve full joint replacements with autonomous bone grafts. Could my short toe be grafted with my own bone and some sort of joint surface created so that I could maintain a functioning MPJ?

Here's another question that has been bugging me: Why do podiatrists insist that a joint fusion is better than a toe amputation? I mentioned this to my podiatrist and he said that I would have to go to South America to have an amputation done. Why? I have read that people who have amputated toes learn to balance and they can walk, run, and dance. I think that that is more believable than the claim that you can do those things when you've had a joint fusion. An amputation seems much more functional than a fusion. Have you ever heard of having an amputation for end-stage MPJ arthritis?

My podiatrist hasn't mentioned the allograph replacement, nor has he answered my many other questions. I feel like I am supposed to just give up on an active life and succumb to a fusion. I am seeking a second opinion in a few weeks.

Any information about this would be so appreciated.