Comparison of friction of metallic and ceramic brackets during sliding mechanics after prophylaxis with sodium bicarbonate jet: An in vitro study

An in vitro experimental study was carried out with the objective to compare the friction in aesthetic and metallic brackets after prophylaxis with sodium bicarbonate jet during sliding mechanics. Aesthetic monocrystalline (n=24) and polycrystalline (n=24) and metallic brackets (n=24) were used. Eac...

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Bibliographic Details
Published in:	International orthodontics Vol. 19; no. 2; pp. 269 - 273
Main Authors:	Galavotti Viana, Aline Rosa, Carneiro, Diego Patrik Alves, Carneiro, Pricila Alves, Correr, Américo Bortolazzo, Vedovello, Silvia Amélia Scudeler, Valdrighi, Heloísa Cristina
Format:	Journal Article
Language:	English
Published:	France Elsevier Masson SAS 01-06-2021
Subjects:	Ceramics Dental prophylaxis/methods Dental Stress Analysis Esthetics, Dental Friction Materials Testing Orthodontic Appliance Design Orthodontic Brackets Orthodontic Wires Sodium Bicarbonate Stainless Steel Surface Properties Dental prophylaxis/methods Sodium bicarbonate Friction Orthodontic brackets
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Summary:	An in vitro experimental study was carried out with the objective to compare the friction in aesthetic and metallic brackets after prophylaxis with sodium bicarbonate jet during sliding mechanics. Aesthetic monocrystalline (n=24) and polycrystalline (n=24) and metallic brackets (n=24) were used. Each group of brackets was divided into two groups, as follows: the first group received prophylaxis with a bicarbonate jet, while the second group did not. An acrylic plate was attached to the base fixature of the Instron 4411 universal testing machine, simulating the retraction movement of the canine during sliding mechanics. The bracket was pulled at a speed of 0.5mm/minute over a distance of 0.5mm. The data were analysed by analysis of variance (ANOVA) and Tukey test. After the sodium bicarbonate jet, conventional metal brackets showed less friction (P<0.05). While the aesthetic brackets did not show significant difference in friction between the exposed and non-exposed groups with the sodium bicarbonate jet (P>0.05), the polycrystalline brackets showed greater friction when compared to the other groups of brackets. It was concluded that prophylaxis with sodium bicarbonate jet did not influence the resistance to friction in aesthetic brackets; however, metal brackets showed a significant decrease in friction after prophylaxis with sodium bicarbonate jet. Our results suggest that the abrasion of the sodium bicarbonate particles can cause micromorphological changes, which may influence the friction; however, studies with scanning electron microscopy are necessary.
ISSN:	1761-7227 1879-680X
DOI:	10.1016/j.ortho.2021.02.002