Table.
Surface Properties and Composition (based on MSDS from the manufacturer, 3M) of Resin Composite (Z250), Total-etch (SB), and Self-etch (EB) Adhesives
| Z250 | SB | EB | ||
|---|---|---|---|---|
| Contact angle | 89 ± 4.1a | 75 ± 5.0b | 55.4 ± 4.0c | |
| Degree of conversion | 71.7 ± 2.2a | 66.1 ± 4.5a | 74.9 ± 5.8a | |
| Elements (atomic %) | C1s | 66.4 ± 3.6 | 72.2 ± 3.0 | 71.4 ± 2.3 |
| O1s | 24.8 ± 1.8 | 24.8 ± 2.1 | 25.0 ± 1.2 | |
| Si2p | 3.6 ± 1.4 | 1.7 ± 0.7 | 1.5 ± 0.9 | |
| Zr3d | 0.4 ± 0.2 | 0.1 ± 0.1 | 0.05 ± 0.04 | |
| Chemical Bonds (atomic %) | C-CC-O | 66.7 ± 1.522.4 ± 1.4 | 66.9 ± 2.221.8 ± 2.7 | 66.4 ± 1.323.7 ±1.6 |
| C=O | 9.4 ± 0.5 | 10.0 ± 3.1 | 9.8 ± 0.2 | |
| Z250 | SB | EB | ||
| Composition | Bisphenol A diglycidyl ether dimethacrylate (BisGMA) | 5-10 | 60-70 | 15-25 |
| 2-Hydroxyethyl methacrylate (HEMA) | — | 30-40 | 15-25 | |
| Diurethane dimethacrylate (UDMA) | 5-10 | — | — | |
| Bisphenol A polyethylene glycol diether dimethacrylate (BisEMA) | 5-10 | — | — | |
| Triethylene glycol dimethacrylate (TEGDMA) | 1-5 | — | — | |
| Silane-treated ceramic | 75-85 | — | 8-12 | |
| Water | 1-2 | — | 10-15 | |
| Ethanol | — | — | 10-15 | |
| Phosphoric acid-6-methacryloxy-hexylesters | — | — | 10-15 | |
| 1,6-Hexanediol dimethacrylate | — | — | 5-10 | |
| Copolymer of acrylic and itaconic acid | — | — | 1-5 |
Data are plotted with standard deviation of the mean. One-way analysis of variance (ANOVA) and Tukey’s post hoc tests were used to test for significant differences in contact angle or degree of conversion between and among the materials. Values with the same letter denote statistically non-significant differences between and among materials for the same assay (p > .05).