CAJ | 학술논문

背景:牙体预备过程中高速涡轮机振动可破坏粘固剂与牙根、粘固剂与桩界面内的连续作用力,影响桩核的冠方封闭效果.目的:观察不同种类的粘固剂在不同时机行牙体预备对纤维桩冠方微渗漏的影响.方法:下颌单根管前磨牙随机分成3个实验组,在桩道预备后分别用Rely × luting、Panavia F、Paracore 5 mL粘接纤维桩.3个实验组内随机分成A,B,C 3个亚组,分别在粘固剂调和15,45,90 min后进行牙体预备后,经染色及透明化处理.在体式显微镜下记录各亚组微渗漏得分.结果与结论:同一牙体预备时机下,Rely × luting对纤维桩造成的冠方微渗漏影响最明显,Panavia F其次,Paracore 5 mL则最少;同一种粘固剂完全固化后,不同牙体预备时机对纤维桩冠方微渗漏无影响.
배경:아체예비과정중고속와륜궤진동가파배점고제여아근、점고제여장계면내적련속작용력,영향장핵적관방봉폐효과.목적:관찰불동충류적점고제재불동시궤행아체예비대섬유장관방미삼루적영향.방법:하합단근관전마아수궤분성3개실험조,재장도예비후분별용Rely × luting、Panavia F、Paracore 5 mL점접섬유장.3개실험조내수궤분성A,B,C 3개아조,분별재점고제조화15,45,90 min후진행아체예비후,경염색급투명화처리.재체식현미경하기록각아조미삼루득분.결과여결론:동일아체예비시궤하,Rely × luting대섬유장조성적관방미삼루영향최명현,Panavia F기차,Paracore 5 mL칙최소;동일충점고제완전고화후,불동아체예비시궤대섬유장관방미삼루무영향.
BACKGROUND: The vibration of high speed handpiece during tooth preparation may have adverse effect on the continuous force of the bonding interfaces among the cement, dentin, and post core. OBJECTIVE: To find the effect of different types of cements on the coronal microleakage of fiber post under different tooth preparation timings, and to provide evidence for the clinical operation. METHODS: The extracted mandibular premolars were divided into 3 groups, and they were cemented by Rely X luting, Panavia F and Paracora 5 mL, respectively. Each group was averagely divided into 3 subgroups: A, B, C groups which were prepared 15 minutes, 45 minutes, and 90 minutes after the cements mixed. All roots were then dyed and transparented. The teeth were observed under stereoscopic microscope and the dyeing scores were also recorded. RESULTS AND CONCLUSION: Rely X luting caused the highest coronal microleakage of fiber post, followed by Panavia F, while Paracore 5 mL, brought about the lowest under the same tooth preparation timing. Different tooth preparation timing caused no significant effect on the coronal microleakage of fiber post when the cement had been completely set.