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Analysis of surface roughness and surface free energy characteristics of various orthodontic materials

Cited 21 time in Web of Science Cited 20 time in Scopus
Authors
Ahn, Hyo-Beom; Ahn, Sug-Joon; Lee, Shin-Jae; Kim, Tae-Woo; Nahm, Dong-Seok
Issue Date
2009
Publisher
Elsevier
Citation
American Journal of Orthodontics and Dentofacial Orthopedics 2009;136:668-674
Abstract
The purpose of this study was to analyze the differences in surface characteristics of various orthodontic materials; this might provide valuable information on bacterial adhesion to orthodontic materials.

Methods
Surface roughness (SR) and surface free energy (SFE) characteristics of 5 orthodontic adhesives (2 composites resins, 2 resin-modified glass ionomer cements, and 1 compomer), 5 bracket materials (2 stainless steel, 1 monocrystalline sapphire, 1 polycrystalline alumina, and 1 plastic) and bovine incisors were investigated by using confocal laser scanning microscopy and the sessile drop method.

Results
There were significant differences in SR and SFE characteristics among orthodontic materials. Bovine incisors showed the roughest surface, and monocrystalline sapphire showed the smoothest surface. However, there were only small variations in SR (less than 0.3 μm) among the materials, except for bovine incisors. In contrast to SR, there were big differences in SFE characteristics among materials. Generally, bracket materials showed lower SFE—specifically, dispersive and polar components on their surfaces—than orthodontic adhesives. Resin-modified glass ionomer cements had the highest SFE, dispersive component, and polarity; these conditions are more favorable for bacterial adhesion.

Conclusions
This study suggests that SFE characteristics can influence bacterial adhesion to orthodontic materials more than SR, and bracket materials might have less favorable SFE characteristics for bacterial adhesion than orthodontic adhesives.
Language
English
URI
https://hdl.handle.net/10371/48046
DOI
https://doi.org/10.1016/j.ajodo.2007.11.032
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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