This has been going on for about 8 months. Around Christmas of 2007, I had pain in the upper
left area. My regular dentist found
decay in the very back tooth and also crowned that tooth. Since the crown, I have been back to my regular dentist several times; they have taken several x-rays and can't find any problems. He also referred me to a gum specialist and a root canal specialist - neither of which found anything of concern.