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Parameters that Affect in vitro Bonding of Glass-ionomer Liners to Dentin

Al Azhar University, Cairo, Egypt

J.M. Powers

School of Dentistry, The University of Michigan, Ann Arbor, Michigan 48109-1078

R. Yamaguchi

The Nippon Dental University, School of Dentistry at Niigata, Niigata, Japan

The purpose of this study was to evaluate the effects of two concentrations of poly (acrylic acid) (10 and 25%), three treatments (untreated, passive conditioning, and active conditioning), and two storage conditions (24 hours in 37°C water and thermal cycling) on the in vitro tensile bond strength of three commercial glass-ionomer liners to human dentin. Bond strengths to untreated dentin after storage for 24 hours ranged from 19.0 to 21.7 kg/cm² for Glasionomer Base Cement, Cement/Liner, and Ketac-Bond, but dropped to a range of 4.9 to 9.7 kg/cm² after thermal cycling. Active conditioning with 10% acid resulted in bond strengths after 24-hour storage that ranged from 23.5 to 44.0 kg/cm², compared with values from 21.7 to 38. 0 kg/cm² with active conditioning using 25% acid. Active conditioning with 10% acid resulted in bond strengths after thermal cycling that were in the range of 15.8 to 27.4 kg/cm² and were 80 to 320 percent higher than values resulting from passive conditioning under these conditions. Active conditioning with 10% acid for 30 seconds produced a bond strength for Glasionomer Base Cement of 44.0 kg/cm², compared with a bond strength of 28.7 kg/cm² for a 10-second active conditioning. Qualitative analysis of scanning electron photomicrographs showed that dentin tubules were opened to a greater extent by active conditioning with 25% acid than by passive conditioning with 10% acid.

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Journal of Dental Research, Vol. 67, No. 9, 1161-1163 (1988)
DOI: 10.1177/00220345880670090401


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Barakat, M.M. Articles by Yamaguchi, R. Search for Related Content PubMed PubMed Citation Articles by Barakat, M.M. Articles by Yamaguchi, R. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB ACRYLIC ACID SODIUM ACRYLATE Social Bookmarking                         What's this?