Surface analysis of metal clips of ceramic self-ligating brackets
김경숙, 한세직, 이태희, 박태준, 최삼진, 강윤구, 박기호,
소속 상세정보
김경숙 ( Kim Kyung-Sook ) - Kyung Hee University School of Medicine Department of Biomedical Engineering
한세직 ( Han Se-Jik ) - Kyung Hee University Graduate School Department of Medical Engineering
이태희 ( Lee Tae-Hee ) - Kyung Hee University Graduate School Department of Orthodontics
박태준 ( Park Tae-Joon ) - Kyung Hee University Graduate School Department of Orthodontics
최삼진 ( Choi Sam-Jin ) - Kyung Hee University School of Medicine Department of Biomedical Engineering
강윤구 ( Kang Yoon-Goo ) - Kyung Hee University School of Dentistry Department of Orthodontics
박기호 ( Park Ki-Ho ) - Kyung Hee University School of Dentistry Department of Orthodontics
Abstract
Objective: The aim of this study was to analyze the surface composition, roughness, and relative friction of metal clips from various ceramic self-ligating brackets.
Methods: Six kinds of brackets were examined. The control group (mC) consisted of interactive metal self-ligating brackets while the experimental group (CC, EC, MA, QK, and WA) consisted of interactive ceramic self-ligating brackets. Atomic force microscopy-lateral force microscopy and scanning electron microscopy-energy-dispersive X-ray spectroscopy were used to analyze the surface of each bracket clip.
Results: All the clips in the experimental groups were coated with rhodium except for the QK clip. The results showed that the QK clip had the lowest average roughness on the outer surface, followed by the MA, EC, WA, and CC clips. However, the CC clip had the lowest average roughness on the inner surface, followed by the QK, WA, MA, and EC clips. The QK clip also had the lowest relative friction on the outer surface, followed by the MA, EC, CC, and WA clips. Likewise, the CC clip had the lowest relative friction on the inner surface, followed by the QK, WA, MA, and EC clips.
Conclusions: The surface roughness and relative friction of the rhodium-coated clips were generally higher than those of the uncoated clips.
키워드
Self-ligating bracket; Rhodium coating; Surface roughness
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