title: Removal of hard paste fillings from the root canal by ultrasonic instrumentation.
mesh_terms: D000328:Adult; D003786:Dental Pulp Cavity; D005260:Female; D006801:Humans; D008297:Male; D012387:Root Canal Filling Materials; D014464:Ultrasonic Therapy / Q000295:instrumentation*
chemical_list: D012387:Root Canal Filling Materials