Objective To investigate the effect of calcium hydroxide(CH) intracanal medicament against endodontic interappintment emergencies(IAE).

• 目的 探讨氢氧化钙 (calciumhycroxide ,CH)根管内封药对根管治疗期间急症 (Endodonticinterapp -ointmentemergencies,IAE)的预防效果。