I had a filling changed for right upper first molar, but in 2 weeks I was having intolerable headache, pain in ear, tongue, jaw and surrounding areas. The doc re-opened the filling and found pulpitis, said his drilling might have exposed pulp. I was prescribed anti-biotics for a week and he did root-canal. 3 canals were found and filled, on top of the filling he put cotton stuffing and then the temporary filling. He had already used up all of my insurance on the fillings, so said the permanent filling could be done in an year. Is it safe to wait for an year, I am not really sure if he did the sealing properly.