“…Furthermore, one reason given for the decrease in the bond strength between dental cements and dentin after immersion in water is that moisture reaches the bond surface from behind by passing through the dentinal tubules or organic components contained therein19, 34,35) From this, the importance of blocking the dentinal tubules becomes obvious. The role of the HY agent is clearly demonstrated36).…”
We bonded a glass ionomer cement (GIC) containing various amounts of incorporated tannin-fluoride preparation (HY agent) to bovine dentin and investigated the effect of the ratio of incorporated preparations and the changes in bond strength over time. HY agent was incorporated into the powder at 0% (HY0), 1.5% (HY1.5), 5.0% (HY5), and 10.0% (HY10) by weight. The shear bond strength and percent of the cohesive failure were measured. Similar tests were performed on samples where diammine silver fluoride was applied to the dentin prior to placing the cement. It was found that the bond strength on the first day was increased by incorporating 1.5% of the HY agent in the GIC. The combined use of diammine silver fluoride increased the bond strength of the GIC.
“…Furthermore, one reason given for the decrease in the bond strength between dental cements and dentin after immersion in water is that moisture reaches the bond surface from behind by passing through the dentinal tubules or organic components contained therein19, 34,35) From this, the importance of blocking the dentinal tubules becomes obvious. The role of the HY agent is clearly demonstrated36).…”
We bonded a glass ionomer cement (GIC) containing various amounts of incorporated tannin-fluoride preparation (HY agent) to bovine dentin and investigated the effect of the ratio of incorporated preparations and the changes in bond strength over time. HY agent was incorporated into the powder at 0% (HY0), 1.5% (HY1.5), 5.0% (HY5), and 10.0% (HY10) by weight. The shear bond strength and percent of the cohesive failure were measured. Similar tests were performed on samples where diammine silver fluoride was applied to the dentin prior to placing the cement. It was found that the bond strength on the first day was increased by incorporating 1.5% of the HY agent in the GIC. The combined use of diammine silver fluoride increased the bond strength of the GIC.
The retention of cast gold crowns luted with zinc phosphate cement to smooth and rough surfaced extracted teeth was examined. No significant difference in retention was observed between smooth and rough surfaced teeth. A significant linear association existed between the surface area of the teeth tested and the retentive force but, statistically, area could not be used as a useful predictor for crown retention.
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