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Effect of fluoride on friction between bracket and wire
1Torabinejad Dental Research Center, Department of Orthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Dental Research Journal
|February 2, 2013
Summary
Fluoride treatments increase friction between orthodontic brackets and arch wires, impacting space closure. Acidic fluoride gels and mouthwashes significantly elevate frictional resistance compared to controls.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Materials
Background:
- Friction is a critical factor during orthodontic space closure using sliding mechanics.
- Understanding factors influencing friction is essential for optimizing treatment efficiency.
Purpose of the Study:
- To evaluate the impact of fluoride-containing agents on frictional resistance.
- To compare frictional forces between stainless steel brackets and steel/nickel-titanium (NiTi) arch wires under different fluoride exposures.
Main Methods:
- 144 stainless steel brackets and steel/NiTi arch wires were tested.
- Frictional resistance was measured after immersion in acidulated phosphate fluoride gel, sodium fluoride mouthwash, and saline control.
- Static and dynamic frictional forces were quantified, and surface topography was analyzed.
Main Results:
- Fluoride gel significantly increased static and dynamic frictional forces compared to NAF and control groups (P<0.001).
- Rectangular wires exhibited higher friction than round wires (P<0.001).
- 0.016-inch NiTi wires showed higher friction than steel wires, but no significant difference was found for 0.019x0.25-inch wires.
Conclusions:
- Prophylactic agents with high fluoride concentrations and acidity significantly affect friction between orthodontic brackets and wires.
- Fluoride exposure can alter the frictional characteristics of orthodontic appliances.
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