Sounds similar to when I tore my ACL. It was ~9 months until I was medically healed, but closer to 18 before I was fully back with strength and confidence in my knee.
Yeah, I had an anterior tibialis from a cadaver grafted onto my biceps tendon ("grafted" in this case really means stitched onto the remnants of mine with metal thread and then bolted into my radius bone). Recovery was long and brutal, but five years later I don't have any issues.