Cyclic fatigue resistance of waveone gold, protaper next and 2shape nickel titanium rotary instruments using a reliable method for measuring temperature
| Autor: | Keziban Olcay, Tan Fırat Eyüboğlu, Erhan Erkan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Dental Stress Analysis
Cyclic stress Dental Instruments Continuous rotation Rotation WaveOne Gold. Protaper Next Temperature measurement Radius of curvature (optics) 03 medical and health sciences Reciprocating motion 0302 clinical medicine Nickel 2shape Cyclic Fatigue Resistance Alloys Nickel‑Titanium Rotary Instruments Medicine Inner diameter Humans 030212 general & internal medicine Composite material Titanium business.industry Significant difference Temperature 030206 dentistry General Medicine Stainless Steel Nickel titanium Equipment Failure Gold business Root Canal Preparation Dental Alloys |
| Popis: | Objective: The purpose of this study was to evaluate the cyclic fatigue resistances of the WaveOne Gold (WOG), ProTaper Next (PTN), 2Shape (TS) instruments. Materials and Methods: Totally 45 new WOG (25/.07), PTN (25/.06), TS (25/.06) files were tested inside the artificial canal of a custom-made stainless steel block with an inner diameter of 1.5 mm, a 60° angle, and a 5-mm radius of curvature. A 16-mm-long file segment (from the tip) was introduced and was immersed in 37°C water. The number of cycles to fracture (NCF), time to failure (TTF), fractured fragment length (FL) was recorded and the fractured surface was examined using microscope. Results: WOG > PTN > TS according to TTF results (P = 0.00). PTN > TS according to NCF results (P = 0.00). The FL values showed no significant difference (P = 0.335). Conclusions: Reciprocating motion can be used more safely than continuous rotation due to the higher cyclic fatigue resistance. |
| Databáze: | OpenAIRE |
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