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Classification of reviewed fillers and nanofillers
| Additives | Filler (Size -μm) | Nano-filler (Size -nm) |
|---|---|---|
| Metal oxides | Aluminum oxide (Al2O3 | Al2O3 |
| Zirconium oxide (ZrO2) | ZrO2 and nanotube | |
| Titanium oxide (TiO2) | TiO2 | |
| Noble metals | Silver (Ag) | AgNPs |
| Gold (Au) | ||
| Platinum (Pt) | ||
| Palladium (Pd) | ||
| Mineral | HA | HA |
| Silicon dioxide (SiO2) | SiO2 | |
| Mica | ||
| Nanoclay | ||
| HNT | ||
| Carbon family | Nano-carbon | |
| NDs |
Abbreviations: HA, hydroxyapatite; HNT, Halloysite nanotube; ND, nano-diamond; NP, nanoparticle.
