| The effect of ultrasonic file sizes on smear layer removal in passive ultrasonic irrigation |
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Hye-Ju Kang1, Sera Jung2, Ara Cho3, Mi-Gon Park4, Hyoung-Hoon Jo5 |
1Department of Conservative Dentistry, School of Dentistry, Chosun University
2Department of Conservative Dentistry, School of Dentistry, Chosun University
3Department of Conservative Dentistry, School of Dentistry, Chosun University
4Department of Conservative Dentistry, School of Dentistry, Chosun University
5Department of Conservative Dentistry, School of Dentistry, Chosun University |
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| Abstract |
Objectives
The aim of this study was to evaluate the efficacy of CK files as an ultrasonic instrument, and to determine most efficient file size for smear layer removal. Materials and Methods: Thirty-six extracted human mandibular premolars with single, straight root canals and mature apices were mechanically prepared and randomly divided into three groups. Group 1 (Control) underwent conventional needle irrigation, Group 2 (CKS) underwent passive ultrasonic irrigation with a #20 CK file, and Group 3 (CKL) underwent passive ultrasonic irrigation with a #30 CK file. After preparation and irrigation, all teeth were dried and split with a chisel to obtain the mesial and distal half of their roots. Each sample was evaluated using a scanning electron microscope, and data were analyzed using the Kruskal-Wallis and Mann-Whitney rank sum tests (p<0.05). Results: The CKS group showed less debris in the apical third than the other groups (p<0.05). In this section, no significant difference was observed among the other groups. And, there was no significant difference among any groups for the middle third section. Conclusion: This study showed that PUI with #20 CK file removed more smear layer compared to using #30 CK file at the apical third of the root canal. |
| Key Words:
EDTA;Passive ultrasonic irrigation;Smear layer;Sodium hypochlorite; |
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