Aging Effect of One Bottle-Type Ceramic Primer on Bonding Efficacy of Resin Cement

• Goto Haruhiko

  Department of Crown Bridge Prosthodontics, Nihon University School of Dentistry at Matsudo

Bibliographic Information

Other Title

• １液性セラミックプライマーの保管が接着強さに及ぼす影響

Abstract

Purpose: To understand the degradation mechanisms of commercially available one bottle-type ceramic primer, we prepared one bottle-type experimental ceramic primer consisting of γ-methacryloxy-propyl-trimethoxysilane, γ-MPTS, and 90% ethanol solution. The effects of aging of the experimental primer on the hydrolysis and condensation behavior of γ-MPTS and on the bonding efficacy of γ-MPTS at the interface between cement and ceramic were studied.<br>Methods: We used two lamina bond porcelain primers (LB), that had been aged for 20 months and newly purchased. Experimental primer was aged at 20°C. After aging, we measured ²⁹Si NMR spectrum of the γ-MPTS and the shear bond strength of the cement to silane-treated ceramic by varying aging periods.<br>Results: When the LB was aged for 20 months, the mean bond strength decreased from 26 to 11 MPa. To understand the degradation mechanism in the bond strength, the effects of aging of experimental primer on molecular species of γ-MPTS were examined. With prolonging its aging period, the methoxy group of the silicone functional portion in the γ-MPTS hydrolyzed and the hydrolyzed γ-MPTS species condensed together. The molecular weight of condensed γ-MPTS species increased. On the other hand, when the dimer species of γ-MPTS were produced, a maximum mean bond strength of 28 MPa was observed. Thereafter, the bond strength dropped down and leveled off at 16 MPa.<br>Conclusion: When the LB was aged for 20 months, the bond strength dramatically decreased. This decrease in the mean bond strength was probably attributed to ester exchange reaction of the methoxyl group in the γ-MPTS by the ethanol used as diluent solvent.

Journal

• Nihon Hotetsu Shika Gakkai Zasshi

  Nihon Hotetsu Shika Gakkai Zasshi 52 (2), 107-116, 2008

  Japan Prosthodontic Society

Keywords

• ceramic primer
• ²⁹Si NMR
• shear bond strength

Details

• CRID: 1390282679387860992
• NII Article ID: 130002123753
• NII Article ID: 10029762941
• NII Book ID: AN00197911
• DOI: 10.2186/jjps.52.107
• COI: 1:STN:280:DC%2BD1czgsVKmtA%3D%3D
• ISSN: 1883177X
• ISSN: 03895386
• PubMed: 18467779
• Web Site: http://www.jstage.jst.go.jp/article/jjps/52/2/52_2_107/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2008326818
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed