Tooth on the upper left next to eye tooth had root canal, post, and crown about 10-12 years ago. On my most recent x-rays, the dentist noticed a shadow on my x-ray at the root that wasn't there last year, he recommended I see an oral surgeon. The Oral Surgeon did some kind of x-ray or MRI that came right up on the computer screen. He recommended exploratory surgery to see if the tooth could be resealed, if not, he recommended extraction and a dental implant. I have no pain in the tooth even when he tapped it with his instrument. I don't want to go through an unnecessary procedure and wind up having more problems than I have right now. What should I do?