3.9 Article

Surface analysis of metal clips of ceramic self-ligating brackets

期刊

KOREAN JOURNAL OF ORTHODONTICS
卷 49, 期 1, 页码 12-20

出版社

KOREAN ASSOC ORTHODONTISTS
DOI: 10.4041/kjod.2019.49.1.12

关键词

Self-ligating bracket; Rhodium coating; Surface roughness

资金

  1. Korean Health Technology Research & Development Project
  2. Ministry of Health & Welfare, Republic of Korea [HI14C2241]

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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.

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