CAJ | 학술논문

目的：评价牙科显微镜结合超声技术处理根管内折断器械的临床效果。方法38个根管内的折断器械按种类分为不锈钢挫、镍钛挫、根管桩，应用显微超声技术处理折断于不同位置的不同器械并分析结果。结果38个根管取出27个，总成功率71.1％。其中不锈钢挫成功率71.4％，镍钛挫成功率37.5％，根管桩成功率100％。无一例根管侧穿。按折断位置分，不锈钢挫在根上1/3取出率为100％，根中1/3为81.8％，根尖1/3为33.3％；镍钛挫在根中1/3取出率为60％，根尖1/3取出率为0。在弯曲根管中，不锈钢挫在弯曲冠方取出率为86.7％，弯曲根方取出率为20％；镍钛挫在弯曲冠方取出率为60％，弯曲根方为0。结论牙科显微镜结合超声技术对根管内折断器械的取出是一个行之有效的方法。但对于镍钛器械和折断于根尖1/3或根管弯曲根方的病例取出率相对较低。
목적：평개아과현미경결합초성기술처리근관내절단기계적림상효과。방법38개근관내적절단기계안충류분위불수강좌、얼태좌、근관장，응용현미초성기술처리절단우불동위치적불동기계병분석결과。결과38개근관취출27개，총성공솔71.1％。기중불수강좌성공솔71.4％，얼태좌성공솔37.5％，근관장성공솔100％。무일례근관측천。안절단위치분，불수강좌재근상1/3취출솔위100％，근중1/3위81.8％，근첨1/3위33.3％；얼태좌재근중1/3취출솔위60％，근첨1/3취출솔위0。재만곡근관중，불수강좌재만곡관방취출솔위86.7％，만곡근방취출솔위20％；얼태좌재만곡관방취출솔위60％，만곡근방위0。결론아과현미경결합초성기술대근관내절단기계적취출시일개행지유효적방법。단대우얼태기계화절단우근첨1/3혹근관만곡근방적병례취출솔상대교저。
Objective To evaluate the clinic effect of dental operating microscope ( DOM) and ul-trasonic root canal technique in removing fractured root canal instruments .Methods Eight cases with frac-tured instruments located in different parts of root canals were treated with ultrasonic technique under DOM and the results were analyzed .The fractured instruments were divided into stainless steel file , Ni-Ti file and post according to material type .Results Twenty-seven fractured instruments were removed and the total success rate was71.1%.Among them, the success rate of stainless steel file was 71.4%,of Ni-Ti file was 37.5%and of post was 100%.No root canal perforation occurred .According to the place fractured instru-ments located , the success rate of stainless steel file located at upper 1/3 root canals was 100%,at middle 1/3 was 81.8%and at apex 1/3 was 33.3%;the success rate of Ni-Ti file located at middle 1/3 was 60%and at apex 1/3 was 0.In bent root canals , the success rate of stainless steel file located at bent part crown square was 86.7%and at bent part apex square was 20%;the success rate of Ni-Ti file located at bent part crown square was 60%and at bent part apex square was 0.Conclusion DOM combined with ultrasonic root canal technique in removing fractured instruments is effective , but the success rate is relatively low for Ni-Ti files and the cases fractured instruments located at root canal apex 1/3 or bent part apex square .