Mechanical characterization of aesthetic orthodontic brackets by the dynamic indentation method

Taro Iwasaki, Nagata Shunsuke, Takahiro Ishikawa, Yasuhiro Tanimoto

研究成果: ジャーナルへの寄稿記事査読

2 被引用数 (Scopus)

抄録

The objective of this study is to investigate the mechanical properties, such as the dynamic hardness and indentation elastic modulus, of commercially available aesthetic orthodontic brackets, such as ceramic and plastic brackets, by the dynamic micro-indentation method. Five ceramic brackets, which were made of alumina (both monocrystalline and polycrystalline forms) or zirconia, and two plastic brackets, which were made of glass fiber-reinforced polycarbonate or polyamide, were tested. There were significant differences in the mechanical properties of the monocrystalline and polycrystalline alumina brackets. The mechanical properties of the glass fiber-reinforced plastic bracket were significantly superior to these of the non-glass-fiber-reinforced plastic bracket. The differences in the crystal structures of the ceramic brackets surface affected the dynamic hardness and indentation elastic modulus. Furthermore, the short glass fibers contained in the plastic bracket might contribute to the improvement of the mechanical properties.

本文言語英語
論文番号dmj/2022-051
ページ(範囲)860-867
ページ数8
ジャーナルDental Materials Journal
41
6
DOI
出版ステータス出版済み - 2022

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