AI Article Synopsis
- The study aimed to evaluate how different materials used in orthodontic brackets and wires affect friction in conditions that mimic the mouth.
- Researchers tested stainless steel and titanium-molybdenum alloy wires with various types of brackets, measuring friction coefficients in artificial saliva and assessing surface roughness.
- Results showed that ceramic brackets with stainless steel wires had high friction, suggesting they should be used carefully, while titanium-molybdenum wires with polycarbonate brackets had the highest surface roughness.
Article 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.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4245865 | PMC |
| http://dx.doi.org/10.1590/s1678-77572011000100012 | DOI Listing |
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