I had a silver point root canal in 1987 and have had problems since 1990. Began with ear problems, then the sinus, thyroid, tinnitus, facial pain, mastoid pain problems began. Had the offending tooth pulled in 2010. Days after a fistula appeared on the gum and I suffered massive head pain as the infection drained. However the infection persists. Had tooth x-rays, CAT scans, MRI s, seen a dozen doctors, dentists , ENTs. Nobody believes me.