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 was the only material to have the advantage of the dual
(light cure and chemical cure) setting mechanism, while both Miracle
Mix and Ketac Silver materials both set by a chemical reaction which
required longer time to build up the compressive strength of these
materials.
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