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目的采用葡萄糖氧化酶-过氧化物酶(glucose oxidase-peroxidase,GOD-POD)定量检测纤维桩的微渗漏,分析全酸蚀、自酸蚀及自黏结3种树脂类黏结剂对纤维桩粘固后的冠方微渗漏的影响。方法将大小形态相似的24颗离体上前牙经常规根管治疗,根管上2/3行桩道预备后随机分为3组各8颗牙,分别采用全酸蚀、自酸蚀、自黏结树脂类黏结剂黏结直径为1.8mm的同一种纤维桩。截取离体牙釉牙骨质界下方6mm牙体作为实验试件,采用GOD-POD法测量其微渗漏情况。结果全酸蚀树脂黏结剂Duolink的微渗漏为(0.916±0.106)mmol/L,自黏结树脂黏结剂Embrace WetBond的微渗漏为(0.958±0.047)mmol/L,自酸蚀树脂黏结剂Multilink N的微渗漏为(0.992±0.079)mmol/L,3种黏结剂试件间微渗漏程度比较差异有统计学意义(P<0.05)。结论不同种类树脂黏结剂粘固纤维桩后均有微渗漏发生,与自黏结树脂黏结剂、自酸蚀树脂黏结剂比较,全酸蚀树脂黏结剂产生的微渗漏程度较轻。
Objective To quantitatively detect the microleakage of fiber posts by using glucose oxidase-peroxidase (GOD-POD), analyze the effect of three kinds of resin adhesives, such as total acid etching, self-etching and self- The effect of microleakage of the crown after the fixation. Methods Twenty-four anterior superior teeth of the same size and shape were treated by conventional root canal therapy. After 2/3 of the root canal preparation, the teeth were randomly divided into three groups of eight teeth, Self-bonding resin adhesive bond diameter of 1.8mm same fiber pile. The 6mm tooth under the enamel cementum was taken as experimental specimen, and the microleakage was measured by GOD-POD method. Results The microleakage of Duolink resin was (0.916 ± 0.106) mmol / L and that of self-adhesive resin Embrace WetBond was (0.958 ± 0.047) mmol / L. The self-etching resin adhesive Multilink The microleakage of N was (0.992 ± 0.079) mmol / L, the difference of microleakage between the three kinds of adhesive specimens was statistically significant (P <0.05). Conclusion Different types of resin binder micro-leakage occurred after cementing fiber post. Compared with self-adhesive resin binder and self-etching resin binder, microleakage by all-acid-etching resin adhesive was lighter.