摘要
目的探讨iRoot BP直接修复髓室底穿孔的效果。方法收集新鲜拔除的人恒磨牙40颗,其中36颗于髓室底中央制备直径2 mm的穿孔洞型,随机分为A、B组,每组18颗,分别用iRoot BP和矿物三氧化聚合体(MTA)修复髓室底穿孔;另外4颗为对照组,只开髓不制备髓室底穿孔。从A、B组中各随机选择3个样本用扫描电子显微镜观察材料和牙本质的结合界面;其余15个样本用葡萄糖氧化酶-蒽酮法检测微渗漏值。结果 A组中,iRoot BP与牙本质结合较为紧密,而B组中MTA和牙本质之间存在不均匀的微小间隙。在观察期内,B组的微渗漏值高于A组,其差异有统计学意义(P<0.05)。结论 iRoot BP修复髓室底穿孔的封闭效果优于MTA。
Objective To evaluate the effect of furcal perforation treated with iRoot BP. Methods Forty newly extracted human maxillary and mandibular molars were collected. Holes in diameter of 2 mm were prepared at the roof of the central pulp cavity of 36 samples with high speed round ball diamond in order to make perforated model, and then equally and randomly divided them into two groups. The other intact four samples were used as the negative controls. In the experimental groups, group A were repaired by iRoot BP, group B were repaired by mineral trioxide aggregate （MTA）. Three samples in each group were observed under scanning electron microscope （SEM）, and micro- leakage of others was tested by measuring the concentration of leaked glucose with the enzymatic glucose oxidase- peroxidase （GOD-POD） method. Results Microleakage of group B was higher than group A and had statistical diffe- rence （P〈0.05）. The dentin and iRoot BP contacted more closely in group A, some gaps existed between the dentin and MTA in group B. Conclusion For repairing fureal perforation, the effect of iRoot BP is better than that of MTA.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2013年第3期257-259,266,共4页
West China Journal of Stomatology
