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Riva Silver research
Riva silver
Performance
Al-Naimi O.; McCabe J. F.; Comparing the Compressive Strength of Riva Silver GIC with that of Other Competitor Products; University of New Castle, 2005.
Purpose: T o measure the compressive strengths of a number of alloy reinforced glass ionomer cements. The method used would follow ISO9917-1:2003.
Materials and Methods: Following the “ISO9917-1:2003” standard, split moulds and plates were used to make 40 disc specimens, divided into groups of 10, (with 6 + 0.1 mm height and 4 + 0.1 mm diameter) from each one of the following restorative glass-ionomer cements (A total of 120 specimens) and following the manufactuerers’ instructions:
- Riva Silver (SDI Ltd.)
- Miracle Mix (GC)
- Ketac Silver (3M/Espe)
Results: The mean compressive strengths and standard deviatio (SD) of all materials after 1 hr, 1 week and 1 month, are shown in table 1 . The compressive strength of each material increased gradually with time reaching a maximum at 1 month for Ketac Silver (178.2 + 16.5) and Miracle Mix (211.7 + 15.8 Mpa), and at 1 week for Riva Silver (204.5 + 10.3).
| Testing | Ketac Silver | Miracle Mix | Riva Silver |
| 1 hr | 97.8 (7.9) | 122.6 (4.7) | 134.3 (2.9) |
| 1 day | 155.4 (4.5) | 175.3 (8.7) | 179.0 (4.6) |
| 1 week | 163.8 (6.6) | 207.6 (11.9) | 204.5 (10.3) |
| 1 month | 178.2 (16.5) | 211.7 (15.8) | 203.0 (14.6) |
Table: 1
Riva Silver had significantly the highest compressive strength at 1 hr, while Ketac Silver had significantly the lowest values at all times.