TY - JOUR AU - Barbosa, William Carlos Silva AU - Correr, Américo Bortolazzo AU - Carneiro, Diego Patrik Alves AU - Vedovello Filho, Mário AU - Godoi, Ana Paula Terossi de AU - Valdrighi, Heloísa Cristina PY - 2019/11/12 Y2 - 2024/03/28 TI - Evaluation of friction on self-ligating and conventional brackets associated with different types of archwires submitted to sliding mechanics JF - Brazilian Journal of Oral Sciences JA - Braz. J. Oral Sci. VL - 18 IS - SE - Article DO - 10.20396/bjos.v18i0.8657258 UR - https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8657258 SP - e191605 AB - <p><strong>Aim:</strong> The aim of this study was to verify the frictional force during sliding mechanics in orthodontic tooth movement, using conventional metal brackets of the active and passive self-ligating types with stainless steel and copper nickel titanium archwires. <strong>Methods:</strong> This experimental <em>in vitro</em> study was conducted with conventional metal (Morelli, Sorocaba, SP, Brazil) brackets, active self-ligated (SLI Morelli, Sorocaba, SP, Brazil) and passive self-ligated (SLP Morelli, Sorocaba, SP, Brazil), with slot 0.022 x 0.028 inches and Roth prescription.&nbsp; The brackets were tested with rectangular section 0.019 x 0.025 inch copper nickel titanium and stainless steel archwires. For each type of bracket, 10 sets of plate/bracket/archwire segment (n=10) were fabricated. Non-parametric Kruskal Wallis and Dunn tests were used for comparison between types of brackets and Wilcoxon tests for comparison between types of archwires. <strong>Results:</strong> The results showed that the frictional force values were higher with copper nickel titanium than with stainless steel archwires (p&lt;0.05). When copper nickel titanium archwires were used, the active self-ligating brackets showed higher frictional force values than the other types, followed by the conventional brackets.&nbsp; Lower frictional force values were observed with passive self-ligating brackets. For stainless steel archwires, no difference was observed between conventional and active self-ligating brackets, the passive self-ligating type presented lower frictional force values than the others. <strong>Conclusion:</strong> It was concluded that the higher frictional force was observed when active self-ligating brackets were associated with copper nickel titanium archwires.&nbsp; Lower frictional force was verified between passive self-ligating brackets combined with stainless steel archwires.&nbsp;&nbsp;&nbsp;</p> ER -