I had a molar extracted three years ago. The other teeth migrated west, and filled the gap, BUT it resulted in misalignment and an uneven bite. I now can't close my mouth properly (to my husband's dismay! yak yak yak) and grind my teeth day and night in a subconscious effort to wear down the shifted tooth. My front teeth are now visibly crooked, and lean a bit sideways. I had to have the molar out as it was rotten right through, but as yours is saveable, I'd save it!