fa Resistance to Sliding in Clear and Metallic Damon 3 and Conventional Edgewise Brackets: an In vitro Study ارتودنسی Orthodontics پژوهشي Research <b> Statement of the Problem</b>: Frictional forces are considered as important counterforce to orthodontic tooth movement. It is claimed that self-ligating brackets reduce the frictional forces. <div>  <b>Purpose: </b>The aim of this study was to compare the resistance to sliding in metallic and clear Damon brackets with the conventional brackets in a wet condition.</div><div><b> Materials and Method:</b> The samples included 4 types of brackets metallic and clear Damon brackets and metallic and clear conventional brackets (10 brackets in each group). In this study, stainless steel wires sized 0.019×0.025 were employed and the operator’s saliva was used to simulate the conditions of oral cavity. The tidy-modified design was used for simulation of sliding movement. The resistance to sliding and static frictional forces was measured by employing Testometric machine and load cell. </div><div>  <b>Results:</b> The mean (±SD) of resistance to sliding was 194.88 (±26.65) and 226.62 (±39.9) g in the esthetic and metallic Damon brackets, while these values were 187.81(±27.84) and 191.17(±66.68) g for the clear and metallic conventional brackets, respectively. Static frictional forces were 206.4(±42.45) and 210.38(±15.89) g in the esthetic and metallic Damon brackets and 220.63(±49.29) and 215.13(±62.38) g in the clear and metallic conventional brackets. According to two-way ANOVA, no significant difference was observed between the two bracket materials (clear and metal) and the two types of bracket (self-ligating versus conventional) regarding resistance to sliding (p= 0.17 and p= 0.23, respectively) and static frictional forces (p= 0.55 and p= 0.96, respectively).</div><div><b> Conclusion</b>: Neither the type of bracket materials nor their type of ligation made difference in resistance to sliding and static friction.</div><hr><p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><b>Source: </b>Journal of Dentistry Shiraz University of Medical Sciences </p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><a href="http://dentjods.sums.ac.ir/index.php/JDSUMS/article/view/642" target="_blank"><font color="#0000ff">Full Text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-3110&slc_lang=fa&sid=1 Mohammad Karim Soltani 100319475328460014369 100319475328460014369 No Dept. of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamedan, Iran. Farzaneh Golfeshan golfeshanf@yahoo.com 100319475328460014370 100319475328460014370 Yes Dept. of Mechanical Engineering, School of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran Yoones Alizadeh 100319475328460014371 100319475328460014371 No Dept. of Mechanical Engineering, School of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran Jabraeil Mehrzad 100319475328460014372 100319475328460014372 No Dept. of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamedan, Iran.