| Autor: |
Soram Oh, Kee-Yeon Kum, Hyun-Jung Kim, Su-Young Moon, Hyeon-Cheol Kim, Antonis Chaniotis, Hiran Perinpanayagam, Eugenio Pedullá, Seok Woo Chang |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Journal of Dental Sciences, Vol 15, Iss 4, Pp 472-478 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1991-7902 |
| DOI: |
10.1016/j.jds.2019.10.003 |
| Popis: |
Background/purpose: Several single-file systems manufactured using different heat treatment and operated by different kinematics have been released. This study compared the bending resistance and cyclic fatigue resistance of three NiTi files, and examined their phase-transformation behavior. Materials and methods: WaveOne Gold Primary (WOG), Reciproc Blue R25 (RPB), and HyFlex EDM OneFile (HDM) were tested (N = 40/instrument). A vertical load was applied to a point 3 mm from the tip, and the stress was measured until a displacement of 3 mm. Tests were conducted at either room temperature (RT: 22 °C) or body temperature (BT: 37 °C) (n = 10). Cyclic fatigue resistance tests were performed in an artificial canal, which had a curvature angle of 40° and a 5-mm radius. Tests were conducted at either RT or BT (n = 10). Instruments were operated according to the manufacturers' instructions. Test results were analyzed using the Kruskal–Wallis and the Mann–Whitney tests. Additional three instruments of each brand were subjected to differential scanning calorimetry (DSC). Results: At RT the bending resistance of three files were not significantly different. However, at BT the bending resistance of RPB was highest, followed by WOG, and HDM (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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