Clinical evaluation of using dental operating microscope combines ultrasonic root canal technique in removing fractured root canal instruments
- VernacularTitle: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评价
- Author:
Mohan XU
;
Yueli WANG
;
Lidou YANG
;
Xinxiao LUO
;
Wushu HE
;
Xiaohui ZHOU
- Publication Type:Journal Article
- Keywords:
Dental operating microscope;
Ultrasonic root canal technique;
Fractured instrument
- From:
Journal of Chinese Physician
2010;(z1):30-32
- CountryChina
- Language:Chinese
-
Abstract:
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 .
