Research Article
Long-Term Fluoride Exchanges at Restoration Surfaces and Effects on Surface Mechanical Properties
| Analysis undertaken | Group 1 (fluoride release/recharge) | Group 2 (mechanical properties; elastic modulus/hardness) |
| Specimen number per material | 3 | 6 | Storage media | Deionized water | Deionized water Lactic acid pH 4 | Analysis times over 18 mth aging | Bimonthly (0, 2, 4, 6, 8, 10, 12, 14, 16, and 18 mths) | 24 hrs, 1 mth, 3 mths, 6 mths, 12 mths, and 18 mths | Time elapsed following 18 mth F− recharge before recharge analysis | 2 months | 24 hours |
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