2种测定根尖微渗漏方法的比较

Comparison of two means for evaluation of apical microleakage

目的:比较透明牙技术和染料溶解法评价根尖微渗漏的一致性。方法:选取人单根管牙49颗,随机分为A、B、C3个实验组各15颗牙和2个对照组各2颗牙。根管预备后,实验组分别采用AH Plus(A组)、Cortisomol(B组)、氧化锌丁香油糊剂(C组)3种根管充填糊剂联合牙胶进行根管充填,阳性对照组采用单一牙胶尖进行充填;充填后,阳性对照组和实验组均将根尖孔区(根尖孔周围2mm范围)以外的牙体表面涂布2层指甲油。阴性对照组采用牙胶尖加AH Plus糊剂进行根管充填,充填后整个牙体表面涂布2层指甲油。将所有实验样本染色,分别采用透明牙技术和染料溶解法进行根尖微渗漏评价,采用SPSS12.0软件包对结果进行统计学分析。根据数据情况,分别采用方差分析和秩和检验,分析2种方法的一致性。结果:2种评价根尖微渗漏的方法均显示,A组(AH Plus糊剂)根尖微渗漏较其他2个实验组小(P<0.05);B组(Cortisomol)、C组(氧化锌丁香油糊剂)根尖微渗漏无统计学差异(P>0.05)。结论:在染色法基础上,透明牙技术和染料溶解法进行根尖微渗漏的评价结果具有一致性。

PURPOSE： To compare the consistency of two means of evaluating the apical microleakage. METHODS： Forty-nine extracted single-rooted human teeth were divided into 3 experimental groups of 15 teeth each, in addition to a positive and negative control group of 2 teeth each. The teeth were instrumented, then obturated using lateral condensation and one of three endodontic sealers： AH Plus（group A）, Cortisomol（group B） and zinc oxide eugenol（group C）. The apical microleakage was measured by transparent tooth technique or dye dissolution each. SPSS 12.0 software package was used for One-way ANOVA and Kruslal-Wallis test. RESULTS： The two methods both showed that the microleakage in group A was significantly less （P〈0.05） than that in group B and C. There was no significant difference between group B and C （P〉0.05）. CONCLUSION： Based on the dye penetration method, there is some consistency between the transparent tooth technique and dye dissolution method for evaluating apical microleakage.