Artigos Científicos, Teses e Dissertações

 Mais de 800 mil documentos organizados em 40 mil temas com acesso ao Texto Completo
Home > Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation > Descrição

Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation

Autor Principal: Fidalgo,Tatiana Kelly da Silva
Outros Autores: Pithon,Matheus Melo, Maciel,José Vinicius Bolognesi, Bolognese,Ana Maria
Tipo: Artigo
Idioma: Inglês
Publicado em: Journal of Applied Oral Science 2011
Assuntos:
Friction
Tensile strength
Orthodontic brackets
Orthodontic wires
Topography
Link Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000100012
Saved in:
OBJECTIVE: The objective this work was to assess the friction coefficient between brackets and wires of different materials under conditions simulating the oral environment.

MATERIAL AND METHODS: Stainless steel (SS) and titanium-molybdenum alloy (TMA) wires of 0.019x0.025-in diameter (American Orthodontics) and polycarbonate bracket (American Orthodontics), ceramic bracket (American Orthodontics), and metal bracket (3M Unitek) with slots of 0.022x0.030-in were used.

The friction coefficient was assessed by means of mechanical traction with the system immersed in artificial saliva.

The mean roughness of both wire surface and bracket slots was evaluated by using a surface profilometer.

RESULTS: The system using TMA wire and polycarbonate bracket had the highest roughness (p<0.05).

SS wire with ceramic bracket had the highest friction coefficient, whereas the use of metallic bracket yielded the lowest (p<0.05).

However, it was observed a statistically significant difference in the system using TMA wire and ceramic bracket compared to that using TMA wire and polycarbonate bracket (p=0.038).

CONCLUSIONS: Ceramic brackets in association with SS wire should be judiciously used, since this system showed a high friction coefficient.

Documentos Relacionados