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目的研究不同修复体修复根管治疗后的尖牙的牙冠渗漏情况。方法将2013年起收治的60颗上尖牙随机分成A、B、C、D 4组,每组15颗。所有牙齿完成根管治疗后,根管充填材料切至髓室底的高度。A、B组的髓腔入口分别补上复合体Dyract、光聚合树脂TPH;C、D两组髓腔入口分别以玻璃离子体Ketac-fil、和临时填补材料Caviton作基底,补上光聚合树脂TPH,保证2.5mm深,所有牙齿置于染色剂中7 d,接受50个冷热循环,将牙齿沿着长轴分开,在显微镜下,测量牙冠的渗漏深度及各修复物深度。计量资料采用t检验,P<0.05为差异有统计学意义。结果各组渗透深度两两比较,A组与B组、C组与D组比较渗漏深度差异均无统计学意义(均P>0.05);C组与A组、D组与A、C组与B组、D组与B组比较渗漏深度显著减少,差异有统计学意义(P<0.05)。结论由此研究七天短期的视察显示,光聚合树脂TPH作为前牙根管治疗修复后体时,使用玻璃离子体Ketac-fil或临时填补材料Caviton做基底,有助于避免牙冠微渗漏进入基底以下的根管部分。
Objective To study the canine crown leakage after root canal repair with different restorations. Methods Sixty canines treated in 2013 were randomly divided into A, B, C and D 4 groups, 15 in each group. After all the teeth had undergone root canal treatment, the root canal filling material was cut to the height of the pulp chamber. Group A and group B were infused with composite Dyract and photopolymerized resin TPH respectively. The entrances of C and D were respectively treated with glass ionomer Ketac-fil and temporary filling material Caviton as substrate, and then photopolymerized resin TPH, 2.5 mm deep, with all teeth in the dye for 7 days, undergoing 50 cycles of cold and warm, separating the teeth along the long axis, measuring the depth of the crown’s leakage and the depth of each restoration under the microscope. Measurement data using t test, P <0.05 for the difference was statistically significant. Results There was no significant difference in the depth of leakage between group A and group B, group C and group D (all P> 0.05); Group C and group A, group D and group A and group C Compared with group B, the depth of leakage of group D and group B was significantly reduced, the difference was statistically significant (P <0.05). Conclusions This study of seven days of short-term inspections showed that the use of photopolymerizable resin TPH as anterior root canal for the repair of the posterior body using glass ionomer Ketac-fil or temporary filling material Caviton as a substrate helps to prevent microleakage of the dental crown Root canal below the basal portion.