Transportation Assessment in Simulated Curved Canals after preparation with Twisted File Adaptive and BT-Race instruments

• Published in: Journal of clinical and experimental dentistry 2017-09, Vol.9 (9), p.e1136-e1140
• Main Authors: Andrade-Junior, Carlos-Vieira, Neto, Nilton-Dessaune, Rodrigues, Renata-Costa-Val, Antunes, Henrique-Dos Santos, Porpino, Mariana-Teixeira-Maneschy, Carvalhal, Júlio-Cesar A, Armada, Luciana
• Format: Article
• Language: English
• ISSN: 1989-5488; 1989-5488
• DOI: 10.4317/jced.54220

This study compared the incidence of deviation along curved canals after preparation with two nickel-titanium (NiTi) rotary systems, Twisted File Adaptive and BT-RaCe. Forty resin training blocks with curved canals were filled with ink and divided into two groups according to the instrumentation technique. Preinstrumentation images were acquired by using a stereomicroscope. The canals were up to an instrument #35/0.04. Postinstrumentation images were captured using the same conditions, and the images were superimposed. The amount of resin removed was measured at 8 different points, beginning at the apical terminus of the canal. Differences in the mesial and distal aspects were measured to evaluate the occurrence of deviation. The Student's-t test was used for comparison of the intragroup deviation. Intergroup analysis was performed by using one-way ANOVA for each level. For multiple comparisons, the Bonferroni test was used and a cutoff for significance was set at 5%. Intragroup analysis showed that both instrumentation techniques promoted some deviation at all levels. BT-RaCe showed significantly lower deviation at 0 and 4-mm levels than Group Twisted File Adaptive (