If it'ss too deep you might need to get the RCT or extraction of the affected tooth..

Hi,if you are experiencing pain in that filled tooth,first of all take painkiller Zerodol-P twice daily fater meals along with antibiotic Clavam 625 mg thrice daily for four days and metrogyl 200 mg thrice daily along with tablet Bifilac twice daily all after meals,Second thing is that the tooth has a deep cavity that is touching the nerve portion of the tooth that may either require a root canal filling or an extraction.So avoid eating from the affected side and see a dentist asap,also rinses with warm water and salt may help.