1.To study the content alteration of bacterial endotoxin in the exudant from the root canals of periapical treated with calcium hydroxide as intracanal medicament.
检测氢氧化封药前后尖周根管内细菌内毒化。
2.To study the content alteration of bacterial endotoxin in the exudant from the root canals of periapical diseases treated with calcium hydroxide as intracanal medicament.