Im 32. I had my #15 tooth pulled 4 years ago because it couldnt be saved. But I was told i didnt need it anyway since it was occluding with my bottom partially impacted wisdom tooth. So my top 1st molar is occluding my bottom 2nd molar now. My question: is it OK to leave that #15 missing? will the loss of bone over time cause problems to other teeth? And second question, if I were to do any straightening, how much of that bottom tooth needs to keep touching the top to prevent super-eruption?