Artículos de revistas
Apical transportation of manual NiTi instruments and a hybrid technique in severely curved simulated canals
Fecha
2015-01-01Registro en:
Journal of Conservative Dentistry, v. 18, n. 6, p. 436-439, 2015.
0974-5203
0972-0707
10.4103/0972-0707.168796
2-s2.0-84948468753
Autor
State University of Amazonas
Paulista University
Federal University of Amazonas
Universidade Estadual Paulista (UNESP)
Institución
Resumen
Aim: To evaluate the apical transportation induced by two instrumentation techniques in severely curved simulated canals. Materials and Methods: Forty simulated canals were divided into two groups (n = 20), according to the following instrumentation techniques: ProTaper Universal Manual System and a hybrid technique. The simulated canals in the ProTaper group were prepared following the technique recommended by the manufacturer: SX files in the cervical third of the root canal and S1, S2, and F1 files up to the working length. In the hybrid group, preparation was performed with K-files sizes 15, 20, and 25 to the working length, followed by cervical preparation with Gates Glidden burs 1, 2, and 3. Apical finishing was performed with the ProTaper manual files S2 and F1. To analyze apical transportation, the simulated canals were photographed before and after preparation at ×8. The images of the root canals pre- and post-instrumentation were superimposed to measure the distance between the inner and outer walls along the first 3 mm of the apical third. Results: The hybrid group presented the highest apical transportation values; however, with no statistically significant difference in comparison with the ProTaper group (P > 0.05). Conclusions: Both techniques induced similar apical transportation in the original path of the simulated root canals.