CAJ | 학술논문

背景：目前国内外对全酸蚀、自酸蚀及自黏结树脂黏结剂对纤维桩的冠向微渗漏及黏结强度影响的研究仍存在差异。 　　目的：评价全酸蚀、自酸蚀及自黏结3种树脂黏结剂对纤维桩黏固后冠向微渗漏及黏结强度影响。 　　方法：将32颗人离体上前牙随机分成5组，其中3组为实验组，2组为对照组。实验组离体牙经根管预备后，选用全酸蚀、自酸蚀及自黏结3种树脂黏结剂分别黏结直径为1.4 mm的玻璃纤维桩。体视显微镜下观察试件各剖面的微渗漏情况，再将实验组试件沿垂直牙长轴方向切成厚度为2 mm的薄片，万能材料测试机进行微推出实验，并观察试件断裂方式。阳性对照组不进行根管预备，根部涂布指甲油，冠部直接暴露于染色剂中；阴性对照组不进行根管预备，树脂覆盖根管口，将牙体整体涂布指甲油后黏蜡包埋至截面下1 mm。 　　结果与结论：各种树脂黏结剂均存在微渗漏现象，其中全酸蚀树脂黏结剂的微渗漏程度最轻，自酸蚀树脂黏结剂的微渗漏程度最重。3种树脂黏结剂间的微渗漏程度差异有显著性意义(P<0.05)。黏结剂间的黏结强度由高到低分别为全酸蚀树脂黏结剂、自酸蚀树脂黏结剂、自黏结树脂黏结剂，3种黏结剂的黏结强度差异有显著性意义(P<0.05)。试件的主要断裂方式为黏结剂/纤维桩间断裂及混合破坏。说明全酸蚀树脂黏结剂与牙本质结合紧密，与自酸蚀树脂黏结剂、自黏结树脂黏结剂比较在微渗漏程度及黏结性能方面显示出优越性。
배경：목전국내외대전산식、자산식급자점결수지점결제대섬유장적관향미삼루급점결강도영향적연구잉존재차이。 　　목적：평개전산식、자산식급자점결3충수지점결제대섬유장점고후관향미삼루급점결강도영향。 　　방법：장32과인리체상전아수궤분성5조，기중3조위실험조，2조위대조조。실험조리체아경근관예비후，선용전산식、자산식급자점결3충수지점결제분별점결직경위1.4 mm적파리섬유장。체시현미경하관찰시건각부면적미삼루정황，재장실험조시건연수직아장축방향절성후도위2 mm적박편，만능재료측시궤진행미추출실험，병관찰시건단렬방식。양성대조조불진행근관예비，근부도포지갑유，관부직접폭로우염색제중；음성대조조불진행근관예비，수지복개근관구，장아체정체도포지갑유후점사포매지절면하1 mm。 　　결과여결론：각충수지점결제균존재미삼루현상，기중전산식수지점결제적미삼루정도최경，자산식수지점결제적미삼루정도최중。3충수지점결제간적미삼루정도차이유현저성의의(P<0.05)。점결제간적점결강도유고도저분별위전산식수지점결제、자산식수지점결제、자점결수지점결제，3충점결제적점결강도차이유현저성의의(P<0.05)。시건적주요단렬방식위점결제/섬유장간단렬급혼합파배。설명전산식수지점결제여아본질결합긴밀，여자산식수지점결제、자점결수지점결제비교재미삼루정도급점결성능방면현시출우월성。
BACKGROUND:At present, there are stil differences in the studies of total-etch, self-etch and self-bonding resin cement effect on the coronal microleakage and bonding strength of fiber posts. OBJECTIVE:To evaluate the coronal microleakage and the bonding strength of fiber posts treated with three kinds of resin cements. METHODS:Total y 32 upper incisors were randomly divided into five groups, including three experimental groups and two control groups. After the root canal preparation, three kinds of resin cements (EMBRACE WetBond, LuxaCore, Medental Multi-cure) were used to fiber posts with the bond diameter of 1.4 mm. Stereomicroscope was used to observe the microleakage. Then, the specimens were cut into 2 mm wafer along the axis of tooth, and universal testing machine for push-out test was used to observe the failure mode. In the positive control group, no root canal preparation was done, the root was coated with nail polish, and the crown was directly exposed to the dye. In the negative control group, no root canal preparation was done, the root canal orifice was covered with the resin, the tooth was overal coated with nail polish and then embedded 1 mm below the section. RESULTS AND CONCLUSION:The microleakage was observed in al the three resin cements, Medental Multi-cure showed the least microleakage and LuxaCore showed the largest microleakage, and there was significantly different among the three kinds of resin cements (P<0.05). The bonding strength of three cements had significant differences (P<0.05), and ranked from high to low:Mdental Multi-cure, LuxaCore, and EMBRACE WetBond. The main fracture modes were binder/fiber post fracture and mixed failure. The results suggest that the total-etch resin cement binds tightly with the dentin, and owns a superiority in the microleakage and bonding property as compared with the self-etch resin cements and self-bonding resin cements.