If I lost bone and had to get a bone graft for an implant, is it a bad idea to get a bridge instead?

I had tooth 9 removed due to a fracture from the root. Plan was to remove tooth and root for an implant but the root wouldn't come out. My dentist was going to do a bridge but a 2nd option said to get the root out and bone graft for an implant. Round 1 of bone grafting. 3 months later I was told I didn't get enough bone and round two of bone grafting. Now I've waited 6 more months and was just told again that it's not enough bone. I'm now in the middle of doing a bridge or getting a block graft