Chia-Tze Kao1, Jia-Uei Guo, Tsui-Hsien Huang. 1. Institute of Oral Biology and Biomaterial, College of Oral Medicine, Chung Shan Medical University, Taichung, Taiwan, ROC.
Abstract
INTRODUCTION: Titanium nitride (TiN) plating is a method to prevent metal corrosion and can increase the surface smoothness. The purpose of this study was to evaluate the friction forces between the orthodontic bracket, with or without TiN plating, and stainless steel wire after it was corroded in fluoride-containing solution. METHODS: In total, 540 metal brackets were divided into a control group and a TiN-coated experimental group. The electrochemical corrosion was performed in artificial saliva with 1.23% acidulated phosphate fluoride (APF) as the electrolytes. Static and kinetic friction were measured by an EZ-test machine (Shimadazu, Tokyo, Japan) with a crosshead speed of 10 mm per minute over a 5-mm stretch of stainless steel archwire. The data were analyzed by using unpaired t test and analysis of variance (ANOVA). RESULTS: Both the control and TiN-coated groups' corrosion potential was higher with 1.23% APF solution than with artificial solution (P <0.05). In brackets without corrosion, both the static and kinetic friction force between the control and TiN-coated brackets groups showed a statistically significant difference (P <0.05). In brackets with corrosion, the control group showed no statistical difference on kinetic or static friction. The TiN-coated brackets showed a statistical difference (P <0.05) on kinetic and static friction in different solutions. CONCLUSION: TiN-coated metal brackets, with corrosion or without corrosion, cannot reduce the frictional force.
INTRODUCTION:Titanium nitride (TiN) plating is a method to prevent metal corrosion and can increase the surface smoothness. The purpose of this study was to evaluate the friction forces between the orthodontic bracket, with or without TiN plating, and stainless steel wire after it was corroded in fluoride-containing solution. METHODS: In total, 540 metal brackets were divided into a control group and a TiN-coated experimental group. The electrochemical corrosion was performed in artificial saliva with 1.23% acidulated phosphate fluoride (APF) as the electrolytes. Static and kinetic friction were measured by an EZ-test machine (Shimadazu, Tokyo, Japan) with a crosshead speed of 10 mm per minute over a 5-mm stretch of stainless steel archwire. The data were analyzed by using unpaired t test and analysis of variance (ANOVA). RESULTS: Both the control and TiN-coated groups' corrosion potential was higher with 1.23% APF solution than with artificial solution (P <0.05). In brackets without corrosion, both the static and kinetic friction force between the control and TiN-coated brackets groups showed a statistically significant difference (P <0.05). In brackets with corrosion, the control group showed no statistical difference on kinetic or static friction. The TiN-coated brackets showed a statistical difference (P <0.05) on kinetic and static friction in different solutions. CONCLUSION:TiN-coated metal brackets, with corrosion or without corrosion, cannot reduce the frictional force.
Authors: Vito Crincoli; Letizia Perillo; Maria Beatrice Di Bisceglie; Antonio Balsamo; Vitaliano Serpico; Francesco Chiatante; Carmine Pappalettere; Antonio Boccaccio Journal: ScientificWorldJournal Date: 2013-02-28
Authors: Nursel Arici; Berat S Akdeniz; Abdullah A Oz; Yucel Gencer; Mehmet Tarakci; Selim Arici Journal: Korean J Orthod Date: 2021-07-25 Impact factor: 1.372