Comparison of cyclic fatigue life of nickel-titanium files: an examination using high-speed camera.
10.5395/rde.2017.42.3.224
- Author:
Taha ÖZYÜREK
1
;
Neslihan Büşra KESKIN
;
Fatma FURUNCUOĞLU
;
Uğur İNAN
Author Information
1. Department of Endodontics, Ondokuz Mayıs University Faculty of Dentistry, Samsun, Turkey. tahaozyurek@hotmail.com
- Publication Type:Original Article
- Keywords:
Cyclic fatigue life;
Reciproc;
WaveOne;
TF Adaptive;
Slow motion
- MeSH:
Fatigue*;
Radius;
Stainless Steel
- From:Restorative Dentistry & Endodontics
2017;42(3):224-231
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: To determine the actual revolutions per minute (rpm) values and compare the cyclic fatigue life of Reciproc (RPC, VDW GmbH), WaveOne (WO, Dentsply Maillefer), and TF Adaptive (TFA, Axis/SybronEndo) nickel-titanium (NiTi) file systems using high-speed camera. MATERIALS AND METHODS: Twenty RPC R25 (25/0.08), 20 WO Primary (25/0.08), and 20 TFA ML 1 (25/0.08) files were employed in the present study. The cyclic fatigue tests were performed using a dynamic cyclic fatigue testing device, which has an artificial stainless steel canal with a 60° angle of curvature and a 5-mm radius of curvature. The files were divided into 3 groups (group 1, RPC R25 [RPC]; group 2, WO Primary [WO]; group 3, TF Adaptive ML 1 [TFA]). All the instruments were rotated until fracture during the cyclic fatigue test and slow-motion videos were captured using high-speed camera. The number of cycles to failure (NCF) was calculated. The data were analyzed statistically using one-way analysis of variance (ANOVA, p < 0.05). RESULTS: The slow-motion videos were indicated that rpm values of the RPC, WO, and TFA groups were 180, 210, and 425, respectively. RPC (3,464.45 ± 487.58) and WO (3,257.63 ± 556.39) groups had significantly longer cyclic fatigue life compared with TFA (1,634.46 ± 300.03) group (p < 0.05). There was no significant difference in the mean length of the fractured fragments. CONCLUSIONS: Within the limitation of the present study, RPC and WO NiTi files showed significantly longer cyclic fatigue life than TFA NiTi file.
