Objective: To evaluate the effect of staining in red wine on translucency parameter of resin composites.
Methods: Disk-shaped specimens (11 mm in diameter, 2-mm thick, n=5) of A1 and A2 shades of two resin composites, Estelite Σ (E, Tokuyama Dental Corp., Japan) and Clearfil Majesty (M, Kuraray America, New York, NY) were stained in red wine. Translucency parameter (TP) was evaluated at baseline (0) and after 3, 7, and 14 days. Data were analyzed by repeated measures analysis of variance and Fisher's PLSD intervals at the 0.05 level of significance.
Results: Means and standard deviations of translucency parameter at baseline and after staining in red wine for 3, 7, and 14 days are listed in the table. Fisher's PLSD interval for comparisons among composites was 0.3 (p<0.0001). Time of staining (repeated measure) was also a significant factor (p<0.0001). The factor of shade and its interaction with composites were not statistically significant (p=0.44).
Time/TP | EA1 | EA2 | MA1 | MA2 |
0 | 3.8 (0.5) | 4.0 (0.3) | 3.1 (0.2) | 3.0 (0.5) |
3 | 2.9 (0.3) | 3.0 (0.2) | 2.5 (0.2) | 2.6 (0.2) |
7 | 2.6 (0.1) | 2.8 (0.2) | 2.4 (0.4) | 2.3 ( 0.2) |
14 | 2.2 (0.2) | 2.5 (0.3) | 1.7 (0.3) | 1.7 (0.1) |
As compared to initial values, the translucency parameter for EA1, EA2, MA1, and MA2 was reduced to 58%, 63%, 55%, and 57%, respectively, at 14 days.
Conclusion: Changes in translucency parameter as affected by staining in red wine were material dependent but not shade dependent. The translucency parameter of the composites tested decreased after staining in red wine for 14 days.
Acknowledgment: Funded by NIH T32DE015355 and by UT Dental Branch at Houston Student Research Funds.