Objective: The goal of this study was to compare the polish, wear properties and esthetics of Ketac Nano, a nano-hybrid resin modified glass ionomer (NHRMGI), with two resin-modified glass ionomers (RMGI) and a nanohybrid composite (NHC) restorative products and . The restoratives evaluated included three RMGI materials: Ketac Nano (KN, 3M ESPE), Fuji II LC (FIILC, GC), Fuji Filling LC (FFLC, GC), and a NHC: Tetric Evo Ceram (TEC, Ivoclar Vivadent). Method: All materials were mixed and light-cured per manufacturers' recommendation. Samples were polished per a clinically relevant protocol using commercial finishing/polishing systems. The gloss of multiple samples was measured immediately after polishing using a gloss meter at 60 degrees. Three-body wear depth was measured after 80,000 cycles according to ACTA Protocol. Multiple specimens of each material per test protocol were prepared and immersed in 37C deionized water for 24 h before testing. Results: The mean values including their standard deviations in the parentheses are summarized in the following table:
Restorative | Chemistry | FillerType(s) | Wear Depth 80k cycles, micron | Initial Polish Number |
Ketac Nano (KN) | NHRMGI | Fluoroaluminosilicate, Nanomers, Nanoclusters | 21.8(1.3) | 36.5(1.3) |
Fuji II LC (FIILC) | RMGI | Fluoroaluminosilicate | 32.6(0.8) | 3.4(0.6) |
Fuji Filling LC (FFLC) | RMGI | Fluoroaluminosilicate | 52.7(1.2) | 2.4(0.4) |
Tetric Evo Ceram (TEC) | NHC | Macro, micro and nano fillers | 6.8(0.4) | 64.2(11.1) |
Conclusions: ANOVA with Tukey's comparison was performed at p < 0.05. Ketac Nano paste/paste nano-ionomeric restorative (KN) showed significantly higher gloss compared to other RMGIs, closer to that of a hybrid composite. Ketac Nano paste/paste nano-ionomer (KN) had significantly lower wear rate compared to other RMGIs. Clinical photographs along with Atomic Force(AFM) and Scanning Electron(SEM) micrographs will be presented.