Comparison of torque expression in esthetic brackets
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Membros da banca
Resumo
Background: The objective of this work is to test the null hypothesis that there is no difference in the torque expres sion among different esthetic brackets.
Material and Methods: Five ceramic self-ligating brackets (In-Ovation C – GAC, Damon Clear–Ormco, Quic Klear-Forestadent, Click-It -TP Orthodontics, Clarity SL-3M Unitek) and 4 ceramic conventional brackets (Inspi re Ice–Ormco, InVu Ceramic-TP Orthodontics, Ceramic Roth–Morelli, Clarity Metal-Reinforced Ceramic Brac ket-3M Unitek) were selected. Metallic Damon MX self-ligating bracket (Ormco) was used as control. Third-order
moments were measured at 12º, 24º and 36º using an archwire torsion device associated with a Universal Testing
Machine (EMIC DL2000), with 0.019x0.025-inch stainless steel wire. Anova followed by Tukey tests were used
for intergroup comparisons.
Results: In all tested angulations the Damon Clear bracket presented the highest torque expression, followed by
Clarity, Clarity SL and Damon Mx brackets, with the worst torque expression shown by the InVu Ceramic bracket.
The InVu Ceramic demonstrated the largest while the Damon Clear brackets demonstrated the smallest slot height
and clearance.
Conclusions: The null hypothesis was rejected since torque expression was different among the esthetic brackets
evaluated. It was also concluded that the slot height is directly related to torque expression.
Abstract
Assunto
Orthodontic brackets, Incisor, Ceramics, Orthodontic appliances, Torque
Palavras-chave
Torque, Orthodontic brackets, Orthodontic Appliances, Incisor, Ceramics
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Endereço externo
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6797454/