Ana Paula Martins Gomes
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Lais Dos Santos Lissi
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Marcella Batista Pavanello Coelho
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Eduardo Galera Da Silva
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Frederico Canato Martinho
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...
<p class="western" lang="en-US"><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"><strong>Objective: </strong></span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US">The aim of this study was to evaluate the effect of 0.5% peracetic acid solution and 2.5% sodium hypochlorite solution on smear layer removal of root canal walls after rotary instrumentation. </span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"><strong>Material and methods:</strong></span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"> Sixty single-rooted human teeth with standardized length had their canals instrumented by three rotary systems (Biorace, MTwo and Endowave), varying the irrigation solution, as follows (n=10): G1- Biorace System + 0.5% peracetic acid solution; G2- Biorace System + 2.5% sodium hypochlorite solution; G3- MTwo System + 0.5% peracetic acid solution; G4- MTwo System + 2.5% sodium hypochlorite solution; G5- Endowave System + 0.5% peracetic acid solution; G6- Endowave System + 2.5% sodium hypochlorite solution. After instrumentation, the roots were cleaved and the dentin walls were evaluated by SEM at x500 and x2000 magnification for assessing the cleaning of the root canals at the cervical, middle and apical thirds. The analyzed area was quantified according to the total number of tubules present and the percentage of open tubules at each region. Data were submitted to statistical analysis by ANOVA and Tukey tests, at the significance level of 5%. </span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"><strong>Results:</strong></span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"> There were no statistical significant differences among the experimental groups. In all groups the smear layer removal at cervical and medium thirds was higher than that of apical third. </span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"><strong>Conclusion: </strong></span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US">It was concluded that the cleaning obtained at the apical third was lower in all groups studied</span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US">and neither the instrumentation technique nor the irrigating solution was able to promote total smear layer removal from root canal walls.</span></span></span></p><p class="western" lang="en-US"> </p><p class="western" align="JUSTIFY"><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"><strong>KEYWORDS: </strong></span></span></span><span style="font-family: Arial, sans-serif;"><span style="font-size: medium;"><span lang="en-US"> Peracetic acid; Root canal irrigants; Scanning electron microscopy; Sodium hypochlorite.</span></span></span></p>
Smear layer dissolution by peracetic acid of low concentration