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Year : 2019  |  Volume : 16  |  Issue : 4  |  Page : 176-182

Shaping ability of different root canal preparation systems

Department of Endodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt

Correspondence Address:
Dina A. Attia
Department of Endodontics, Faculty of Dentistry, Tanta University, Tanta
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/tdj.tdj_6_19

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Aim To evaluate centering ability, amount of removed dentin of hand NiTi Flex K-files, ProTaper Universal system, OneShape, and WaveOne system in curved root canals. Materials and methods Forty extracted human premolars with a range of canal curvature (21–39°) were used. Samples were randomly divided into four groups (n = 10). Group 1: NiTi Flex (control group), group 2: ProTaper, group 3: OneShape, and group 4: WaveOne Primary. Centering ability of each instrument was evaluated using superimposed standardized preinstrumentation and postinstrumentation cone-beam computed tomography images recorded at three root canal levels (3, 6, and 9 mm from the apex). Amount of removed dentin was calculated by differences between preinstrumentation and postinstrumentation root canal volumes. Results WaveOne system showed the highest mean centering ratios at all tested canal levels in both directions. Apical thirds of all groups showed the highest centering ratios while the coronal showed the lowest. ProTaper system group recorded significantly highest amount of root dentin removal compared to other groups. Conclusion Reciprocating WaveOne files had more centering ability than other tested instruments. ProTaper Universal system removed significantly high amount of dentin in comparison to other systems.

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