Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires?
OBJECTIVE: To compare hysteresis, activation and deactivation forces produced by first-order deformation of Contour 0.014-in NiTi wire (Aditek, Brazil) in four brands of self-ligating brackets: Damon MX, Easy Clip, Smart Clip and In-Ovation. METHODS: Activation and deactivation forces were measured...
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doaj-638524dd65024d5d8db5f2fe5eeb998f2020-11-25T00:54:28ZengDental Press Editora Dental Press Journal of Orthodontics 2176-94512177-67092013-02-011818185Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires?José Rino NetoGilberto Vilanova QueirozJoão Batista de PaivaRafael Yagüe BallesterOBJECTIVE: To compare hysteresis, activation and deactivation forces produced by first-order deformation of Contour 0.014-in NiTi wire (Aditek, Brazil) in four brands of self-ligating brackets: Damon MX, Easy Clip, Smart Clip and In-Ovation. METHODS: Activation and deactivation forces were measured in an Instron universal tensile machine at 3 mm/minute speed to a total displacement of 4 mm. Tests were repeated eight times for each bracket/wire combination. Statistical analysis comprised ANOVA and Tukey's multiple comparisons test. RESULTS: Using a 4-mm deformation, mean activation forces increased in the following order: Damon = 222 gf, Easy Clip = 228 gf, In-Ovation = 240 gf and Smart Clip = 306 gf. The same order was observed for mean hysteresis values, i.e., 128 gf, 140 gf, 150 gf and 206 gf, respectively. The respective values of deactivation forces for the Damon, Easy Clip, In-Ovation and Smart Clip brackets were 94 gf, 88 gf, 90 gf and 100 gf. CONCLUSIONS: Brackets with higher activation forces were accompanied by higher hysteresis values, which resulted in clinically similar deactivation forces, regardless of the type of self-ligating brackets used.<br>OBJETIVO: comparar as forças de ativação, desativação e histerese produzidas por deformação de primeira ordem do fio superelástico Contour NiTi 0,014" (Aditek®) em quatro modelos de braquetes autoligáveis: Damon MX, Easy Clip, Smart Clip e In-Ovation. MÉTODOS: as forças de ativação e desativação foram medidas em máquina universal de tração Instron com velocidade de 3mm/minuto e deslocamento de 4mm. Em cada combinação braquete/fio foram executadas oito repetições. A análise estatística empregou ANOVA e o Teste de Comparações Múltiplas de Tukey. RESULTADOS: com 4mm de deformação, as forças médias de ativação foram, em ordem crescente, Damon = 222gf, Easy Clip = 228gf, In-Ovation = 240gf e Smart-Clip = 306gf; a mesma ordem foi observada nas histereses médias, cujos valores foram, respectivamente, 128gf, 140gf, 150gf e 206gf; os valores das forças de desativação foram, respectivamente, 94gf, 88gf, 90gf e 100gf. CONCLUSÃO: os braquetes com maiores valores nas forças de ativação foram acompanhados por maiores valores na histerese, o que resultou em forças de desativação clinicamente semelhantes, independentemente do tipo de braquete autoligável utilizado.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512013000100018Ortodontia corretivaFios ortodônticosAparelhos ortodônticosCorrective orthodonticsOrthodontic bracketsOrthodontic wires |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
José Rino Neto Gilberto Vilanova Queiroz João Batista de Paiva Rafael Yagüe Ballester |
spellingShingle |
José Rino Neto Gilberto Vilanova Queiroz João Batista de Paiva Rafael Yagüe Ballester Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? Dental Press Journal of Orthodontics Ortodontia corretiva Fios ortodônticos Aparelhos ortodônticos Corrective orthodontics Orthodontic brackets Orthodontic wires |
author_facet |
José Rino Neto Gilberto Vilanova Queiroz João Batista de Paiva Rafael Yagüe Ballester |
author_sort |
José Rino Neto |
title |
Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? |
title_short |
Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? |
title_full |
Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? |
title_fullStr |
Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? |
title_full_unstemmed |
Does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic NiTi archwires? |
title_sort |
does self-ligating brackets type influence the hysteresis, activation and deactivation forces of superelastic niti archwires? |
publisher |
Dental Press Editora |
series |
Dental Press Journal of Orthodontics |
issn |
2176-9451 2177-6709 |
publishDate |
2013-02-01 |
description |
OBJECTIVE: To compare hysteresis, activation and deactivation forces produced by first-order deformation of Contour 0.014-in NiTi wire (Aditek, Brazil) in four brands of self-ligating brackets: Damon MX, Easy Clip, Smart Clip and In-Ovation. METHODS: Activation and deactivation forces were measured in an Instron universal tensile machine at 3 mm/minute speed to a total displacement of 4 mm. Tests were repeated eight times for each bracket/wire combination. Statistical analysis comprised ANOVA and Tukey's multiple comparisons test. RESULTS: Using a 4-mm deformation, mean activation forces increased in the following order: Damon = 222 gf, Easy Clip = 228 gf, In-Ovation = 240 gf and Smart Clip = 306 gf. The same order was observed for mean hysteresis values, i.e., 128 gf, 140 gf, 150 gf and 206 gf, respectively. The respective values of deactivation forces for the Damon, Easy Clip, In-Ovation and Smart Clip brackets were 94 gf, 88 gf, 90 gf and 100 gf. CONCLUSIONS: Brackets with higher activation forces were accompanied by higher hysteresis values, which resulted in clinically similar deactivation forces, regardless of the type of self-ligating brackets used.<br>OBJETIVO: comparar as forças de ativação, desativação e histerese produzidas por deformação de primeira ordem do fio superelástico Contour NiTi 0,014" (Aditek®) em quatro modelos de braquetes autoligáveis: Damon MX, Easy Clip, Smart Clip e In-Ovation. MÉTODOS: as forças de ativação e desativação foram medidas em máquina universal de tração Instron com velocidade de 3mm/minuto e deslocamento de 4mm. Em cada combinação braquete/fio foram executadas oito repetições. A análise estatística empregou ANOVA e o Teste de Comparações Múltiplas de Tukey. RESULTADOS: com 4mm de deformação, as forças médias de ativação foram, em ordem crescente, Damon = 222gf, Easy Clip = 228gf, In-Ovation = 240gf e Smart-Clip = 306gf; a mesma ordem foi observada nas histereses médias, cujos valores foram, respectivamente, 128gf, 140gf, 150gf e 206gf; os valores das forças de desativação foram, respectivamente, 94gf, 88gf, 90gf e 100gf. CONCLUSÃO: os braquetes com maiores valores nas forças de ativação foram acompanhados por maiores valores na histerese, o que resultou em forças de desativação clinicamente semelhantes, independentemente do tipo de braquete autoligável utilizado. |
topic |
Ortodontia corretiva Fios ortodônticos Aparelhos ortodônticos Corrective orthodontics Orthodontic brackets Orthodontic wires |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512013000100018 |
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