I had a crown placed on a tooth a while back and it kept falling off. Now I'm being told I need crown lengthening. I went to 2 dentists who told me to have the tooth extracted. One dentist told me that there was some decay and that the tooth would need to be pulled one day anyway. He also told me that the area was too small to put an implant in. I don't like the idea of pulling the tooth and leaving a gap. What should I do? Please help.