フルテキストURL Dent_Material_33_3_e124.pdf
著者 Yoshihara, Kumiko| Nagaoka, Noriyuki| Maruo, Yukinori| Nishigawa, Goro| Irie, Masao| Yoshida, Yasuhiro| Meerbeekf, Bart Van|
抄録  OBJECTIVE:  CAD-CAM blocks to fabricate semi-direct and indirect restorations are available in different sorts of ceramics as well as composite. In order to bond restorations prepared out of composite blocks into tooth cavities, it is recommended to gently sandblast the surface prior to the application of a primer/adhesive. Today, the effect of sandblasting composite block surfaces has not thoroughly been investigated. In this study, the ultra-structure of composite CAD-CAM blocks was investigated with special attention to the effect of sandblasting on the surface topography and of silanization on the bonding performance.  METHODS:  Five different composite CAD-CAM blocks were involved. We correlatively investigated their structural and chemical composition using X-ray diffraction (XRD), energy dispersion spectroscopy (EDS), scanning electron microscopy (SEM) and (scanning) transmission electron microscopy ((S)TEM). The effect of sandblasting was also imaged in cross-section and at the interface with composite cement. Finally, we measured the shear bond strength to the sandblasted block surface with and without silanization.  RESULTS:  All composite blocks revealed a different ultra-structure. Sandblasting increased surface roughness and resulted in an irregular surface with some filler exposure. Sandblasting also damaged the surface. When the sandblasted composite blocks were silanized, superior bonding receptiveness in terms of higher bond strength was achieved except for Shofu Block HC.  SIGNIFICANCE:  Sandblasting followed by silanization improved the bond strength to composite CAD-CAM blocks. However, sandblasting may also damage the composite CAD-CAM block surface. For the composite CAD-CAM block Shofu Block HC, the damage was so severe that silanization did not improve bond strength.
キーワード CAD–CAM bond strength composite sandblast silane coupling agent
発行日 2017-03
出版物タイトル Dental Materials
33巻
3号
出版者 Elsevier Science
開始ページ e124
終了ページ e135
ISSN 0109-5641
NCID AA10443138
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
論文のバージョン author
PubMed ID 28057347
DOI 10.1016/j.dental.2016.12.003
Web of Sience KeyUT 000396409900004
関連URL isVerionOf https://doi.org/10.1016/j.dental.2016.12.003