Evaluation of the cutting ability of two reciprocating instruments (WaveOne Gold e W-file)

Abstract

Instrumentation is a fundamental step in endodontic treatment to promote proper cleaning and shaping of the canal. The objective of this study was to compare the cutting capacity of two reciprocal nickel-titanium systems in simulated canal blocks. Sixty acrylic blocks were used, divided into two groups of reciprocal files (WaveOne Gold - WOG and W-File - WF), each with 30 blocks and divided into 3 groups (n=10) representing the first, second and third uses: WOG1, WOG2, WOG3, WF1, WF2, and WF3, respectively. Ink was injected into the simulated channels, which were covered with laminated paper to avoid affecting the instrumentation. For irrigation, 5mL of saline was used at each instrument change. At the end of instrumentation, the blocks were photographed and analyzed in a computer program to compare the results before and after instrumentation. In the statistical analysis, the tests S Shapiro-Wilk, T for independent samples and Mann Whitney were performed. Under the experimental conditions in which this study was conducted, it is concluded that there were no significant differences in apical transport after the third application. However, the instruments of the W-File group had more conservative preparations with a better centralization capacity compared to the instruments of the WaveOne Gold group, which caused preparations with a larger diameter.

Avaliação da capacidade de corte das limas WaveOne Gold e W-file após o quarto uso

“…Silva et al, 2021 afirmaram que após o primeiro uso houve diferenças significativas entre as limas WOG e WF na parte externa da curva no terço cervical e no ponto final do canal, e em todas as áreas avaliadas, consideravelmente mais resina foi retirada do lado de fora da curva com o instrumento WOG. A análise após o segundo uso mostrou que havia diferenças significativas no exterior do terço médio, e WOG removeu mais resina na parte interna da curva em todos os pontos medidos, e na parte externa da curva O grupo WF apresentou maior desgaste em todas os pontos e após o terceiro uso, não foi possível verificar diferenças significativas, ou seja, ambas as limas transportaram/retiram a mesma quantidade de resina do canal (De Carvalho et al, 2021).…”