Comparison of static friction with self-ligating, modified slot design and conventional brackets
J. appl. oral sci
;
21(4): 314-319, Jul-Aug/2013. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-684571
ABSTRACT
OBJECTIVE:
To compare the static frictional forces generated at the bracket/wire interface of stainless steel brackets with different geometries and angulations, combined with orthodontic wires of different diameters. MATERIAL ANDMETHODS:
The frictional forces were evaluated with three different types of metal brackets a passive self-ligating (SmartClipTM, 3M/Unitek, Monrovia, USA), with a modified slot design (Mini Uni TwinTM, 3M/Unitek, Monrovia, USA) and conventional (Kirium, Abzil, São José do Rio Preto, Brazil). The samples were mounted in a testing device with three different angulations and tested with 0.014" and 0.018" stainless steel wires (American Orthodontics, Sheboygan, USA). The static frictional force was measured using a universal testing machine (DL 500, EMIC®, São José dos Pinhais, Brazil) with a crosshead speed of 1 mm/min. Statistical analysis was performed by two-way ANOVA followed by Bonferroni's post hoc test.RESULTS:
There was a significant difference (p<0.05) in static friction when the three types of brackets were tested with the same wire size. The wire diameter influenced friction only when the brackets had a 10º angulation (p<0.05). The angulation influenced friction (p<0.05) when the brackets were associated with a 0.018" wire.CONCLUSION:
Brackets with a modified slot design showed intermediate static frictional force values between the conventional and self-ligating brackets tested. .
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Fios Ortodônticos
/
Braquetes Ortodônticos
/
Desenho de Aparelho Ortodôntico
/
Fricção
Idioma:
Inglês
Revista:
J. appl. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2013
Tipo de documento:
Artigo
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