I've had tooth pain for 5 mo.! I've visited 3 dentist, one being an Endodontist & oral surg. NONE have discovered my problem. Tests done w/tapping, using ice, etc. and my local dentist has decided to place a temp crown on back, lower molar, thinking it's the tooth (but not 100% sure). Pain is still there! I take 600 mg. ibuprofen 3 times per day (which works) and am tired of the ongoing pain and no answers after numerous visits! Suggestions? Could it be an issue under an existing crown? Xrays show nothing!