IADR Abstract Archives
Fluoride Release of New Glass-ionomers Mediated by Glass Surface Treatment
Objectives: New GICs (Riva, SDI Ltd.) have been developed with new powder formulations and powder surface treatments designed to give increased fluoride release. The purpose of this work was to compare the new cements (one restorative and one luting) with existing, commercially available products.
Methods: Five specimens (15mm diameter and 1mm thickness) were prepared from three restorative GICs: Riva Self Cure (Fast set, SDI Limited / Australia); Fuji IX GP Fast (GC Corporation, Tokyo / Japan); KetacTM-Molar Quick AplicapTM (3M, ESPE AG / Germany); and three luting GICs: Riva Luting (SDI Limited / Australia); Fuji I Capsule (GC Corporation, Tokyo / Japan); KetacTM-Cem AplicapTM (3M, ESPE AG / Germany). After storing for 24hrs at 37ºC and 100% humidity the specimens were lapped and placed in 3ml de-ionised distilled water at 37ºC. The water was replaced daily and the 24h fluoride release was measured using an ion selective electrode and TISAB III buffer daily up to a week then on days 10, 14, 17, 21, 24 and 28. Results were analysed using ANOVA and Tukey tests at p<0.05.
Results: The mean fluoride release (µg/cm²+SD) on days 1,7,14,21,28 from all tested materials are given in the table. Throughout the experiment Riva SC and Riva-Luting released significantly higher amounts of fluoride than the other materials. The results support the hypothesis that the newly developed glass surface treatment has resulted in materials with high fluoride release.
|
Restorative Materials |
|
Day1 |
Day7 |
Day14 |
Day21 |
Day28 |
|
Fuji IX |
11.3±0.3 |
2.0±0.2 |
1.1±0.1 |
0.9±0.1 |
0.8±0 |
|
|
K-Molar |
9.8±0.5 |
1.8±0.1 |
1.1±0.1 |
0.9±0 |
0.8±0 |
|
|
Riva SC |
21.8±0.8 |
5.2±0.4 |
2.7±0.2 |
2.2±0.1 |
1.8±0.1 |
|
|
Luting Materials |
|
|
|
|
|
|
|
Fuji I |
25.9±0.9 |
6.3±0.2 |
3.9±0.1 |
3.1±0.1 |
2.6±0.1 |
|
|
K-Cem |
28.9±0.5 |
7.0±0.2 |
4.3±0.2 |
3.6±0.1 |
2.9±0.1 |
|
|
Riva-L |
32.8±1.5 |
10.7±0.7 |
6.8±0.5 |
5.4±0.2 |
4.2±0.3 |
Conclusions: Both Riva glass-ionomer cement materials released significantly greater amounts of fluoride than the other materials tested.