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
Article
in English
| LILACS
| ID: lil-578749
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 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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Orthodontic Wires
/
Saliva, Artificial
/
Stainless Steel
/
Titanium
/
Orthodontic Brackets
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2011
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Rio de Janeiro/BR
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