冲洗液对环氧树脂基根管糊剂材料聚合影响的体外研究

摘要

目的：体外研究不同根管冲洗液润湿环境下环氧树脂基根管糊剂材料的聚合转化。方法：在直径2 cm的圆形聚酯薄片上制备AH Plus树脂薄膜，置于不同冲洗液润湿环境的50 mL离心管内聚合。利用傅里叶变换红外光谱仪检测树脂聚合反应前和反应24 h后的聚合转化率。结果：除对照组与95％乙醇之间、两实验组H2O和17％EDTA之间的差异无统计学意义外，两两之间的差异均有统计学意义（P＜0．05）。结论：95％乙醇对AH Plus聚合无影响；而H2O、17％EDTA、2．5％NaOCl显著降低了AH Plus的聚合度，其中2．5％NaOCl降低作用影响最大，H2O和17％EDTA的影响作用其次且相同。临床上应谨慎选择最终根管冲洗液，以避免牙本质残留冲洗液对AH Plus材料的聚合转化的影响。%Objective:The purpose of this in vitro study was to evaluate effects of various irrigant solutions on the degree of conversion of epoxy resin based AH Plus. Method:AH Plus thin films were formed on round Mylar substrates with diameter of 2 cm. The AH Plus films were placed in 50-mL centrifuge tubes with different irrigants as wetting agents. At time points of 0 and 24 hours,the cure of AH Plus films were characterized by Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR). Result:According to one-way analysis of variance,for AH Plus,degree of conversion between control group and 95%ethanol group as well as between H2O group and 17 %EDTA were not signifi-cantly different (P>0.05),but there was significant difference among H2O,17%EDTA,2.5 %NaOCl (P<0.05),and was much smaller than the control group (P <0.05). Conclusion:Except for 95 % ethonal,H2O,EDTA,NaOCl decreased the degree of conversion of AH Plus. NaOCl was not favored as the final irrigating solution because of the most significant inhi-bition effect on the cure of AH Plus.