Objectives: The purpose of this study was to characterize the cyclic fatigue resistance of the ProTaper Gold system and to compare it with the fatigue resistance of ProTaper Universal system. Methods: A mechanical device simulate a root canal system with a radius of curvature of 4.7 mm and an angle of curvature of 45 was used to perform the rotational bending tests. Sizes F2 and F3 of ProTaper Gold and ProTaper Universal instruments constituted 4 experimental groups that were analyzed with a rotational speed of 300 rpm and a torque of 4 N.cm. Time to fracture was recorded and number of cycles to fracture was calculated. Statistical analysis was carried using Kolmogorov-Smirnov, T-student and U Mann-Whitney tests (p<0.05). Results: ProTaper Gold F2 group showed higher number of cycles to fracture than ProTaper Universal F2 group (p<0.05). Concerning F3 instruments, the same tendency could be stated: number of cycles to fracture of ProTaper Gold F3 group was statistically higher (p<0.05). Conclusions: ProTaper Gold system has proven to be more fatigue resistant than ProTaper Universal. Furthermore, instruments with higher diameters showed lower number of cycles to fracture.
|Number of pages||5|
|Journal||Revista Portuguesa de Estomatologia, Medicina Dentaria e Cirurgia Maxilofacial|
|Publication status||Published - 1 Jan 2018|
- Fatigue resistance
- ProTaper gold
- ProTaper universal