Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation
J. appl. oral sci
; 19(1): 57-62, Jan.-Feb. 2011. ilus, graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-578749
Biblioteca responsável:
BR1.1
ABSTRACT
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 ANDMETHODS:
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.
Texto completo:
Disponível
Base de dados:
LILACS
Assunto:
Fios Ortodônticos
/
Saliva Artificial
/
Aço Inoxidável
/
Titânio
/
Braquetes Ortodônticos
Idioma:
Inglês
Revista:
J. appl. oral sci
Ano de publicação:
2011
Tipo de documento:
Artigo
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