![]() ![]() ![]() However, the complex root canal anatomy makes shaping difficult, which can lead to insufficient disinfection and create procedural errors such as canal transportation, ledge, zip, and perforation. Simultaneously, it is also important to maintain the original shape of the root canal and preserve healthy root dentin for the long-term prognosis of teeth. The main purpose of root canal preparation is to remove infected and necrotic pulp tissues in the canal. TruNatomy maintained the original apical canal curvature in S-shaped curved canals better than ProTaper GOLD and WaveOne GOLD. Shaping time was the least for TruNatomy, followed by the WaveOne GOLD and ProTaper GOLD ( p < 0.05). TruNatomy removed less resin than other groups in all sections ( p < 0.05), while ProTaper GOLD removed slightly more resin than WaveOne GOLD however, there was no significant difference ( p = 0.043). When comparing the amount of transportation in the 3 groups at 9 different levels, TruNatomy showed significantly less canal transportation than the other groups at the 3-and 5-mm levels of the canal ( p < 0.05), while ProTaper GOLD showed the largest amount of transportation in the apical curved area at the 2 and 3 mm levels ( p < 0.05). TruNatomy showed a significant deviation between the mesial and distal sides of the canal only in the coronal area at 6, 7, 8, and 9 mm levels of the canal ( p < 0.05). To compare the degree of transportation at different levels between the groups, one-way ANOVA and Kruskal–Wallis tests were performed according to the normality. A paired t-test was used to determine the degree of deviation at different levels within the groups. The preparation time was also calculated. The pre- and post-preparation images were superimposed, and the amount of resin removed from both the mesial and distal sides of the canal measured up to 9 mm from the apical terminus, with a 1 mm increment. The simulated canals were instrumented according to the NiTi file system and photographed again after being dyed with red ink. The blocks were then randomly divided into three groups: group ProTaper GOLD (n = 20), WaveOne GOLD (n = 20), and TruNatomy (n = 20). The root canals of 60 S-shaped resin blocks were dyed using ink and photographed. This study aimed to compare the shaping ability of the ProTaper GOLD, WaveOne GOLD, and newly developed TruNatomy in simulated S-shaped canals. However, it is difficult to accomplish this, especially due to the complex canal anatomy. In root canal preparations, it is important to maintain the original canal shape. ![]()
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