3.AIM: To study the content alteration of bacterial endotoxin in the exudant from the root canals of periapical treated with calcium hydroxide as intracanal medicament.

• 摘要目的：观察氢氧化钙碘仿糊剂运用于有窦型慢性根尖周脓肿根管内封药消毒的临床效果。