Effect of Different Torque Settings on Crack Formation in Root Dentin
| Autor: | Hakan Arslan, Ismail Davut Capar, Banu Uysal, Merve Akcay, Asim Dane |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Rotation Root canal 0206 medical engineering Dentistry 02 engineering and technology Root canal instrumentation Root dentin Tooth Fractures 03 medical and health sciences 0302 clinical medicine Nickel Materials Testing Stereo microscope Dentin medicine Humans Root canal procedure Tooth Root General Dentistry Titanium business.industry Equipment Design 030206 dentistry 020601 biomedical engineering Root Canal Therapy Mandibular premolar medicine.anatomical_structure Torque Dental Pulp Cavity business Root Canal Preparation Dental Alloys |
| Zdroj: | Journal of Endodontics. 42:304-306 |
| ISSN: | 0099-2399 |
| DOI: | 10.1016/j.joen.2015.10.024 |
| Popis: | Introduction The aim of the present study was to observe the incidence of cracks in root canal dentin using the ProTaper Universal system (Dentsply Maillefer, Ballaigues, Switzerland) at low- and high-torque settings. Methods Sixty-nine mandibular premolar teeth that had been extracted for different reasons were selected. The teeth were divided into 3 groups: an unprepared control group, a low-torque settings group (SX = 3, S1 = 2, S2 = 1, F1 = 1.5, F2 = 2, F3 = 2, F4 = 2 N/cm), and a high-torque settings group (SX = 4, S1 = 4, S2 = 1.5, F1 = 2, F2 = 3, F3 = 3, F4 = 3 N/cm). After a root canal procedure, all the teeth were horizontally sectioned at 2, 4, 6, and 8 mm from the apex. Then, under a stereomicroscope, all the slices were examined to determine the presence of cracks. A chi-square test was used for data analysis. The significance level was set at P = .05. Results There were no cracks in the unprepared control group. Vertical root fractures were not observed in any of the groups. There were significantly fewer cracks (17.4% of the sections) in the low-torque group than in the high-torque group (29.4% of the sections) ( P Conclusions In this in vitro study, the instrumentation of root canals with the ProTaper Universal instrument caused more crack formation in root canal dentin at high-torque than at low-torque settings. |
| Databáze: | OpenAIRE |
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