X-rays are needed for accurate diagnosis.  If impacted we should extract but I have treated some mesioangular impaction with root canal therapy also 25 years back... The patient is still eating with the same tooth and crown.  Plz consult a good doctor. 

Cost of  removal of 3rd molar upper - rs 1200-rs 2000 depending upon the xray Cost of removal of lower 3rd molar Non surgical -800-1200 Surgical -3500-8500 depending upon situation. For more accurate information  post us your opg  xray 

Third Molar seems to be impacted and is decaying. Extraction is best treatment option. X-ray will help exact treatment planning..

Hi, As described by you, your third Molar seems to be impacted and is decaying. Only solution for this condition is extraction. Disimpaction Cost varies from doctor to doctor. Please consult your dentist to understand the condition and complications before going for the surgery. Sensitivity of teeth could be due to abrasions/erosion or can be related to the pressure from the impacted molar. Please get an OPG done to get the complete evaluation.

You should get third molar extracted.Try sensitive toothpaste n consult dentist to check further for sensitivity.Also get your thyroid profile done as in case of altered thyroid level patient become more prone to infections. Extraction cost will 500 onwards.