Analysis of cutting capacity, preparation time, and apical deviation after instrumentation of artificial curved canals with the waveone ® and reciproc ® reciprocating systems

  • BRUSCHI J
  • BOFF L
  • MELO T
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Abstract

ABSTRACT Objective To analyze cutting capacity, preparation time, and occurrence of apical deviation, after instrumentation of curved canals with reciprocating Primary WaveOne ® and R25 Reciproc ® systems. Methods Twenty simulated canals with 35° bends were randomly assigned to the Primary WaveOne ® or R25 Reciproc ® . The preparations were made by a single operator. The cutting capacity was assessed by the difference in weight (on an analytical balance) of the canals before and after preparation. The time needed for the preparation was analyzed. The canals were filled with India ink and photographed on a platform before and after the preparation to analyze the apical deviation to a 1 mm length. The images were superimposed in Photoshop ® and the measurement was performed with the ruler tool. Statistical analysis was performed using Student’s t-test. The level of significance was set at 5%. Results The WaveOne ® Primary system was more effective (in terms of cutting capacity) but had a longer preparation time than the R25 Reciproc ® instrument. Apical deviation was the only variable that did not significantly differ between the two systems. Conclusion The WaveOne ® Primary had a higher cutting capacity than the R25 Reciproc ® . Both systems maintained the original canal path. The preparation time was shorter for the R25 Reciproc ® than the WaveOne ® Primary system.RESUMO Objetivo Analisar a capacidade de corte, o tempo de preparo e a ocorrência de desvio apical, após a instrumentação de canais curvos com os sistemas reciprocantes WaveOne ® e Reciproc ® . Métodos Vinte canais simulados, com 35° de curvatura, foram randomicamente divididos para os dois sistemas. Os instrumentos utilizados foram o WaveOne ® Primary e o R25 Reciproc ® . Cada instrumento foi utilizado em um canal. Os preparos foram feitos por um único operador. Para análise da capacidade de corte, os canais foram pesados em balança analítica antes e após o preparo. A diferença na pesagem foi utilizada para aferição. O tempo para execução do preparo foi cronometrado e os valores obtidos foram analisados. Já para análise do desvio a 1 mm do comprimento de trabalho, antes e após o preparo, os canais foram preenchidos com tinta nanquim e fotografados em uma plataforma. As imagens foram sobrepostas no Photoshop ® e, com a ferramenta régua, foi realizada a medição. Resultados Para análise estatística foi utilizado o teste T de Student, com nível de significância de 5%. Na análise da capacidade de corte, o sistema WaveOne ® Primary foi mais eficaz que o instrumento R25 Reciproc ® , embora o seu tempo de preparo tenha sido maior. Apenas no critério, desvio apical, não se verificou diferença significativa entre os dois sistemas. Conclusão O WaveOne ® Primary apresentou uma maior capacidade de corte que o R25 Reciproc ® . Ambos os sistemas respeitaram a trajetória original do canal. O tempo de preparo do R25 Reciproc ® foi menor que o WaveOne ® Primary.

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BRUSCHI, J., BOFF, L. B., & MELO, T. A. F. de. (2017). Analysis of cutting capacity, preparation time, and apical deviation after instrumentation of artificial curved canals with the waveone ® and reciproc ® reciprocating systems. RGO - Revista Gaúcha de Odontologia, 65(3), 191–195. https://doi.org/10.1590/1981-863720170002000013216

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