Physical properties of and dental pulp-periapical tissue responses to self-setting calcium phosphate cements

Abstract

This experiment was enforced to apply calcium phosphate cements in endodontic clinics. pH change and apical canal sealing ability of cements were measured. A surface and a internal structure of the cements were observed using SEM. In the pulp tissue and periapical tissue of rats, reactions for the cements were examined histopathologically. As the results, it was found that the cements showed superior physical property. The cement composed of a equimolar mixture of tetracalcium and dicalcium phosphates kneaded with a buffer solution containing diluted citric acid (TeDCPD) induced deposition of hard tissue at the canal wall and closed the apical foramen. The cements which was kneaded with the solution contained high concentration of citric acid induced less or little of hard tissue deposition.