Assessment of frictional resistance and surface roughness in orthodontic wires coated with two different nanoparticles

Several mechanical and biological factors may change the orthodontic wire frictional resistance (FR). Titanium dioxide (TiO2) and silica dioxide (SiO2) nanoparticle (NP) coatings may be used to improve the characteristics of materials, reducing FR between archwire and bracket. This in vitro study ai...

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Bibliographic Details
Published in:Microscopy research and technique 2022-05, Vol.85 (5), p.1884-1890
Main Authors: Silveira, Ramiro Estacia, Elias, Carlos Nelson, Amaral, Flávia Lucisano Botelho
Format: Article
Language:English
Subjects:
Archwires
Brackets
Coatings
Dental Alloys
Friction
Friction resistance
Materials Testing
Mechanical properties
Morphology
Nanoparticles
nanotechnology
Orthodontic Brackets
Orthodontic Wires
Orthodontics
Parameters
Profilometers
Scanning electron microscopy
scanning eletronic microcopy
Silica
Silicon Dioxide
Statistical analysis
Surface Properties
Surface roughness
Titanium
Titanium dioxide
Wire
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Summary:Several mechanical and biological factors may change the orthodontic wire frictional resistance (FR). Titanium dioxide (TiO2) and silica dioxide (SiO2) nanoparticle (NP) coatings may be used to improve the characteristics of materials, reducing FR between archwire and bracket. This in vitro study aimed to evaluate the FR of orthodontic wires with and without coating in both dry and wet environments and measure the surface roughness (SR). One hundred and eighty segments of rectangular Cr–Ni orthodontic wires (Morelli Co, Brazil) were divided into three groups according to the NP coating applied: TiO2 group; SiO2 group; and control group. The SR parameters were measured in an optical profilometer, the surface morphology was analyzed with scanning electron microscopy (SEM), and FR was performed in a universal testing machine in dry and wet environments (n = 30). The statistical analysis was performed using the Generalized Estimated Equations model with a Bonferroni post‐test (α = 0.05). It was observed that SiO2 NP coating decreased FR significantly when compared to the TiO2 and control groups, in both environments (p 
ISSN:1059-910X
1097-0029
DOI:10.1002/jemt.24049