CAJ | 학술논문

目的：通过比较两种根管预备方法对自粘接型树脂水门汀的影响，观察粘接剂与根管壁间微渗漏的情况，为临床应用的选择提供依据。方法：选择因正畸需要而拔除的下颌单根管第二前磨牙40颗，随机分为实验组A组(不锈钢K锉组)、B组(镍钛器械组)，每组15颗；对照组C组(阳性对照组)、D组(阴性对照组)，每组5颗。经过不同的根管预备方法根备后常规根管充填，然后用RelyX Unicem粘接纤维桩行桩核修复，经体外冷热循环实验后在印度墨水下染色1周，在体视显微镜下观察染料渗入深度。结果：A、B两组冠方微渗漏比较差异有统计学意义(P<0.05)， A组微渗漏值明显大于B组。C组所有试件微渗漏最明显，累及整个根管；D组所有试件未发生微渗漏。结论：在冷热循环条件下，不锈钢K锉组预备后的根管壁与RelyX Unicem粘接剂之间的微渗漏较机用镍钛器械组明显。
목적：통과비교량충근관예비방법대자점접형수지수문정적영향，관찰점접제여근관벽간미삼루적정황，위림상응용적선택제공의거。방법：선택인정기수요이발제적하합단근관제이전마아40과，수궤분위실험조A조(불수강K촤조)、B조(얼태기계조)，매조15과；대조조C조(양성대조조)、D조(음성대조조)，매조5과。경과불동적근관예비방법근비후상규근관충전，연후용RelyX Unicem점접섬유장행장핵수복，경체외랭열순배실험후재인도묵수하염색1주，재체시현미경하관찰염료삼입심도。결과：A、B량조관방미삼루비교차이유통계학의의(P<0.05)， A조미삼루치명현대우B조。C조소유시건미삼루최명현，루급정개근관；D조소유시건미발생미삼루。결론：재랭열순배조건하，불수강K촤조예비후적근관벽여RelyX Unicem점접제지간적미삼루교궤용얼태기계조명현。
Objective:By comparing the root canal preparation methods to study the microleakage between the root cannal wall and self-adhesive cement, providing the basis for the clinical application.Method:A total of 40 second premolars in mandibular which had simple root canal with similar shape and size were selected.The teeth were randomly divided into experimental group A(K file group) and B(Ni-Ti group),15 pieces in each group.The control group(positive control) C and D(negative group) had five pieces in each group.Root canal filling after different root canal preparations,and then used RelyX Unicem cement to bond the fiber to the root canal.After Hot and cold cycle in India ink stained in 1 week,observing the depth of dye penetration under the stereoscopic microscope.Result:The depth of dye penetration of two groups compared,there was statistically significant between the two groups(P<0.05).The depths of dying penetration in group A was longer than group B.The microleakage of group C was obviously.Group D had no microleakage happen.Conclusion:Under the condition of Hot and Cold cycle,the microleakage between root and cement after root canal preparation with K file was obviously worse than with Ni-Ti group.