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The fluoride ion rerelease by each composite after fluoride recharge (10 minutes, 5000 ppm) at 18 months of aging.
| Composite material | Fluoride ion rerelease following recharge (μg/cm2) |
|---|---|
| Beautifil II | 31.7 |
| Gradia Direct X | 11.1 |
| Tetric EvoCeram | 6.0 |
