This is a risk with all of the osteoporosis drugs. It's called osteonecrosis of the jaw
The best thing to do would be to pull the tooth and let it heal before starting the drug. However, one of my teeth broke while I was on one of the osteoporosis drugs. It had to be pulled so that the tooth could be replaced with two crowns and a bridge. Even though it was a small tooth, my dentist sent me to an oral surgeon. I think that the oral surgeon was better informed about the risks. He gave me actual probability, which was actually very low. He then pulled the tooth, and I had no problems.