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ORIGINAL ARTICLE
Year : 2012  |  Volume : 1  |  Issue : 2  |  Page : 78-84

Effect of sodium bicarbonate air abrasive polishing on resistance to sliding during tooth alignment and leveling: An in vitro study


1 Dentistry Graduate Program, Residency in Orthodontics, Brazil
2 Undergrduate Dentistry Program, Brazil
3 Xenobiotics Research Unit, Pontifical Catholic University of Paraná, Brazil
4 Dentistry Graduate Program - Orthodontics, Brazil

Correspondence Address:
Orlando M Tanaka
Graduate Dentistry Program in Orthodontics Pontifical Catholic University of Paraná, School of Health and Biosciences, Curitiba, Brazil. Postdoctoral Fellow, Center for Advanced Dental Education at Saint Louis University Bolsista da CAPES - Proc. BEX 1632/11-6 R. Imaculada Conceição, 1155
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2278-9626.103381

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Objective: The aim of this in vitro study was to evaluate the Resistance to Sliding (RS) provided by metallic brackets and 3 types of orthodontic wires (TMA, SS and NiTi), before and after the use of sodium bicarbonate airborne particle abrasion, in an experimental model with 3 non leveled brackets. Materials and Methods: The bicarbonate airborne abrasion was applied perpendicularly to the bracket slots at a distance of 2 mm, for 5 seconds (T2) and 10 seconds (T3) on each bracket slot. In a universal testing machine, the wires were pulled through a set of 3 non leveled brackets at a cross head speed of 50 mm/min for a distance of 10 mm, and static and kinetic friction readings were registered at T1 (no airborne abrasion), T2 and T3. Results: For all tested wires, a significant RS increase between T1 and T3 (P<0.001) was seen. For SS and TMA wires, there was a statistically significant RS increase between T1 and T2 (P<0.001). Between T2 and T3, RS increase was significant for TMA (P<0.001) and NiTiwires (P<0.05). Conclusions: Sodium bicarbonate air abrasive polishing during orthodontic treatment is not recommended, once this procedure promoted a significant RS increase between the metallic brackets and all the three types of wires tested.


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