Endodontic Retreatment - Removal of Old Filling and Re-preparation under Microscope

Root canal retreatment is mostly used for those who still have symptoms or abnormal imaging after previous root canal filling. The common practice is to remove the old filling/post-core under microscopic assistance, re-establish the pathway, clean and shape it with instruments and liquids, treat omissions or blockages, apply medication for temporary sealing if necessary, and then three-dimensionally fill it again and improve the coronal seal. Postoperative monitoring of pain and periapical imaging is performed. The goal is to control persistent infection and preserve the affected tooth. The above is general health information, not medical advice; the specifics are subject to specialist evaluation and hospital protocols.