I have 2 huge fillings beside each other on my 2 front top teeth. Had these done while I was still in school. About 10 years ago I had to replace them as edges were getting rough. Drilling them out left holes nearly to middle of both teeth from edge of tooth. They are needing replacement again. If they drill this time will they have to drill even deeper than last time? Have not made a decision yet. Suggestions are possible root canals or extracting them and getting fake teeth. Extractions scare me. Need to make a decision as starting to have pain. Any suggestions?