Objective: To compare the surface gloss of Herculite XRV Ultra, a new nano-hybrid restorative, with several commercial composite-resin products: Herculite XRV (micro-hybrid, Kerr), Premise (nano-hybrid, Kerr) and Filtek Supreme (nano-hybrid, 3M ESPE). Methods: The specimens (d×t=50×2 mm, n=3) were prepared, light-cured, finished and polished according to manufacturer's instruction. Toothbrush abrasion was conducted as previously described (IADR 2001, Abstract #535). The surface gloss of the sample after polishing and after tooth brushing was measured by a micro-tri-gloss gloss-meter (BYK-Gardner, MD, USA). The data of specularly reflected light from the sample surface at 60˚ geometry were collected. The initial gloss (Gi) was measured immediately after polishing and final gloss (Gf) obtained after 2000 tooth brushing stokes. Gloss retention (%) was determined by final gloss against initial gloss (Gf/Gi). The data were analyzed by ANOVA and Turkey tests (p≤0.05). Results: Superscript letters (a, b, c) represent statistically equivalent means.
Materials | XRV Ultra | XRV | Premise | Filtek Supreme |
Initial gloss after polishing (%) | 79.4±1.6a | 64.7±3.5b | 70.8±2.3b | 67.1±5.3b |
Final gloss after tooth brushing (%) | 66.5±2.5a | 6.3±0.4b | 46.7±6.3c | 55.3±6.3a, c |
Gloss retention (%) | 83.8±2.1a | 9.7±0.9b | 65.8±7.0c | 82.3±5.6a |
Conclusion: Herculite XRV Ultra has significantly higher initial surface gloss after polishing and higher gloss after tooth brushing compared to other materials in this study. Herculite XRV Ultra has higher gloss retention than XRV, Premise and statistically equivalent to Filtek Supreme.