Physical characteristics of ceramic/glass-polymer based CAD/CAM materials: Effect of finishing and polishing techniques
| Autor: | Ferhan Egilmez, Gulfem Ergun, Mügem Aslı Ekici, Isil Cekic-Nagas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Absorption of water Water solubility 0206 medical engineering Polishing 02 engineering and technology engineering.material Indentation hardness 03 medical and health sciences 0302 clinical medicine Water hardness Natural rubber Dentistry (miscellaneous) Ceramic Dental polishing Metallurgy Diamond 030206 dentistry 020601 biomedical engineering Computer-aided design and computer-aided manufacturing (CAD/CAM) Grinding visual_art visual_art.visual_art_medium engineering Original Article Oral Surgery Surface finishing Hybrid ceramics |
| Zdroj: | The Journal of Advanced Prosthodontics |
| ISSN: | 2005-7814 2005-7806 |
| Popis: | PURPOSE. The aim of this study was to compare the effect of different finishing and polishing techniques on water absorption, water solubility, and microhardness of ceramic or glass-polymer based computer-aided design and computer-aided manufacturing (CAD/CAM) materials following thermocycling. MATERIALS AND METHODS. 150 disc-shaped specimens were prepared from three different hybrid materials and divided into five subgroups according to the applied surface polishing techniques. All specimens were subjected up to #4000 grit SiC paper grinding. No additional polishing has been done to the control group (Group I). Other polishing procedures were as follows: Group II: two-stage diamond impregnated polishing discs; Group III: yellow colored rubber based silicone discs; Group IV: diamond polishing paste; and Group V: Aluminum oxide polishing discs. Subsequently, 5000-cycles of thermocycling were applied. The analyses were conducted after 24 hours, 7 days, and 30 days of water immersion. Water absorption and water solubility results were analyzed by two-way ANOVA and Tukey post-hoc tests. Besides, microhardness data were compared by Kruskal-Wallis and Mann-Whitney U tests (P.05). CONCLUSION. Surface finishing and polishing procedures might negatively affect physical properties of hybrid ceramic materials. Nevertheless, immersion periods do not affect the microhardness of the materials. Final polishing by using diamond polishing paste can be recommended for all CAD/CAM materials. |
| Databáze: | OpenAIRE |
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