title: A preliminary clinical study on the use of tricalcium phosphate as an apical barrier.
mesh_terms: D002126:Calcium Hydroxide / Q000494:pharmacology*; D002130:Calcium Phosphates / Q000494:pharmacology*; D005500:Follow-Up Studies; D006801:Humans; D012387:Root Canal Filling Materials / Q000494:pharmacology; D012389:Root Canal Obturation / Q000379:methods*
chemical_list: D002130:Calcium Phosphates; D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide