乳牙活髓切断术不同盖髓剂的实验研究

目的:比较不同盖髓剂用于乳磨牙活髓切断的效果.方法:36颗小型猪乳磨牙均分为4组.分别用氢氧化钙,氢氧化钙碘仿,FC,戊二醛制剂做盖髓剂行活髓切断术,以对侧同名牙做对照.术后定期做X光和组织病理学观查.结果:X光片检查结果显示:术后2,4,6个月各实验组根尖、根周未见异常,牙根吸收程度与对照组一致.组织病理学结果表明:术后4,6个月用氢氧化钙(88.8%),氢氧化钙碘仿(100%)及戊二醛(100%)做盖髓剂术后有修复性牙本质形成牙本质桥,根髓正常.FC组无完整牙本质桥形成,根髓可见炎症细胞.结论:氢氧化钙碘仿及戊二醛糊制剂做乳牙活髓切断的盖髓剂较为适合.

AN EXPERIMENTAL STUDY OF PULPOTOMY WITH DIFFERENT DRESSING MEDICATIONS IN PRIMARY MOLARS

Objective:To compare the effect of different dressing medications on pulpotomy in primary molars of minipigs.Methods:Thirty six molars of 6 minipigs were assigned to 4 groups randomly,9 teeth in each group.Calcium hydroxide(CH),calcium hydroxide iodoform(CHI),glutaraldehyde(GAL)and formocresol(FC) were used for pulpotomy in each group respectively.Contralateral corresponding teeth were used as controls.The interval of radiographic observation were available at 2,4 and 6 months.Histological observation were performed at 4,6 months after treatment.Results:The radiographic observation revealed that none of exprimental teeth were failure.Pulpotomies were no influence on lifespan of primary molars versus controls.The histological examination showed that experimental teeth in group CH(88 8%),CHI(100%),GAL(100%)had formed reparative dentin bridge and the residual pulp were free from inflammation.No completely reparative dentin bridge had formed in FC group and inflammatory cells were found in the remaining pulp tissue even in periapical region.Conclusion:CHI and GAL are considered as good dressing medications on pulpotomy in primary molars.