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《Journal of Third Military Medical University》 2018-06
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Effects of 3 kinds of nickel titanium instruments on appical microleakage in root canal in vitro

LI Fangfei;TANG Yuying;YANG Xi;WANG Qingqing;Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences,Chongqing Key Laboratory of Oral Biomedical Engineering of Higher Education,Stomatological Hospital of Chongqing Medical University;  
Objective To determine the effects of 3 kinds of nickel titanium instruments,WaveOne and Reciproc( both are single-file reciprocating system),and ProTaper( traditional nickel titanium system)on apical microleakage of root canal filling materials. Methods After root canal preparations were made by WaveOne,Reciproc and ProTaper respectively,warm gutta-percha obturation technique was used to fill root canals. All tooth samples were stained and made to transparent teeth,and the depth of dye from apices was measured and recorded under a dental microscopy. The results were recorded and analyzed statistically.Results The depth of dye from apices was 2. 88 ± 0. 16 mm in the Reciproc group,2. 89 ± 0. 22 mm in the WaveOne group,and 2. 92 ± 0. 19 mm in the ProTaper group. There were no significant difference in the depth between any 2 groups( P 0. 05). Conclusion All WaveOne,Reciproc and ProTaper systems can achieve similar effect for root canal sealing. But,WaveOne and Reciproc systems are recommended because of their high efficiency and accuracy to reduce root canal migration. Reciproc is superior to the other 2 systems because of its better cutting ability to avoid pushing dentin scraping out of apical foramen.
【Fund】: 2016重庆市卫计委医学科研项目(2016MSXM052);; 重庆高校创新团队建设计划资助项目(2016);; 重庆市高校市级口腔生物医学工程重点实验室资助项目(渝教科[2014]55号)~~
【CateGory Index】: R781.05
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