三十年代初提出的空管效应学说认为空管引起炎症,而近年来的一些实验研究得到了不同的结论。N2是一种应用比较普遍的含多聚甲醛的材料,对其临床疗效与组织学反应的评价有较大争论。氧化锌丁香油糊剂为我国最常用的根管充填材料。用酚醛树脂作为塑化液进行牙髓塑化治疗已获得较好的临床效果。为进一步观察、研究空管及上述三种牙髓治疗材料的组织学反应,我们进行了为期三个月的动物实验。 The ATC theory proposed in the early 1930s thought that ATC caused inflammation, and some experimental studies in recent years got different conclusions. N2 is a more commonly used paraformaldehyde-containing material, the clinical efficacy and histological evaluation of the more controversial. Zinc oxide clove oil paste is the most commonly used root canal filling material in our country. The use of phenolic resin as the plasticizing solution for dental pulp plasticization treatment has achieved better clinical results. To further observe and study the histological response of ATC and the three endodontic materials, we conducted a three-month animal experiment.