MISC

2017年3月

Sandblasting may damage the surface of composite CAD-CAM blocks

DENTAL MATERIALS
  • Kumiko Yoshihara
  • ,
  • Noriyuki Nagaoka
  • ,
  • Yukinori Maruo
  • ,
  • Goro Nishigawa
  • ,
  • Masao Irie
  • ,
  • Yasuhiro Yoshida
  • ,
  • Bart Van Meerbeek

33
3
開始ページ
E124
終了ページ
E135
記述言語
英語
掲載種別
DOI
10.1016/j.dental.2016.12.003
出版者・発行元
ELSEVIER SCI LTD

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. (C) 2016 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.dental.2016.12.003
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000396409900004&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.dental.2016.12.003
  • ISSN : 0109-5641
  • eISSN : 1879-0097
  • Web of Science ID : WOS:000396409900004

エクスポート
BibTeX RIS