Comparison of the surface roughness of feldspathic porcelain polished with a novel alumina-zirconia paste or diamond paste
| Autor: | Suparaksa Yamockul, Suchit Poolthong, Niyom Thamrongananskul |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Surface Properties Polishing engineering.material 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine Dental porcelain Materials Testing Surface roughness Aluminum Oxide Cubic zirconia Composite material General Dentistry Sandpaper Diamond Alumina zirconia 030206 dentistry Dental Porcelain Dental Polishing Ceramics and Composites engineering Microscopy Electron Scanning Profilometer Toothpastes |
| Zdroj: | Dental materials journal. 35(3) |
| ISSN: | 1881-1361 |
| Popis: | This study compared the surface roughness of feldspathic porcelain polished with newly developed alumina-zirconia pastes or diamond paste. Porcelain discs were prepared and polished with sandpaper using a polishing-machine. The surface roughness (Ra) of each sample was measured using a profilometer. The samples were randomly divided into 6 groups (n=10). The control group was polished with diamond paste (DP), and the five remaining groups were polished with the newly developed alumina-zirconia paste with the following ratios of glycerin:alumina:zirconia by weight: 1:0.5:0.5 (Z0.5), 1:0.5:0.75 (Z0.75), 1:0.5:1 (Z1), 1:0.5:1.5 (Z1.5), and 1:0.5:2 (Z2). The specimens were polished for 120 s. The Ra values were determined again and the surface morphology of the porcelain samples was analyzed using SEM. The Ra values decreased as the amount of zirconia in the polishing paste increased, except for the Z2 group. The surface roughness as observed by SEM showed a correlation with the Ra values. |
| Databáze: | OpenAIRE |
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