Objective: To test the effect of two different prophylactic pastes on the surface luster of glazed ceramics.
Material and Methods: Forty specimens were obtained from Empress-CAD (Ivoclar/Vivadent) blocks by sectioning into 1-mm-thick slices (12x14 mm), and were glazed with Universal Spray-Glaze (Ivoclar Vivadent). Baseline gloss measurements were made with glossmeter (Novo-Curve, @60¼, in gloss units (GU)) from 3 spots. The samples were randomly assigned to four groups of prophylaxis polishing pastes with different grit sizes (Proxyt Coarse, Proxyt Fine (Ivoclar/Vivadent), Nupro Coarse, Nupro Fine (Dentsply)). Same operator polished the specimens using rubber prophylaxis cups according to the manufacturers' instructions for 60s. After the procedure, gloss of the specimens was re-measured, differences were calculated. Negative values indicate the decrease in gloss. One-way ANOVA was used for analysis of the data (α=0.05).
Results: Table displays the Mean±SD GU difference between baseline and after the prophylaxis procedures. No statistical differences observed between the groups (p>0.05).
| Ceramic
|
Nupro Coarse
| -4.31±7.08
|
Nupro Fine
| 1.83±4.85
|
Proxyt Coarse
| -0.97±5.43
|
Proxyt Fine
| 0.87±4.54
|
Conclusion: No detectable effect on the ceramic surface gloss reduction was observed under the test conditions. This result maybe contributed to the wear resistance of the glaze material. Extended application time is necessary to predict the long-term effect of prophylactic pastes on ceramic surfaces.