Physical characteristics of ceramic/glass-polymer based CAD/CAM materials: Effect of finishing and polishing techniques
The Journal of Advanced Prosthodontics
; : 128-137, 2019.
Article
ي En
| WPRIM
| ID: wpr-742077
المكتبة المسؤولة:
WPRO
ABSTRACT
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 ANDMETHODS:
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.Key words
النص الكامل:
1
الفهرس:
WPRIM
الموضوع الرئيسي:
Rubber
/
Silicon
/
Silicones
/
Solubility
/
Water
/
Ceramics
/
Computer-Aided Design
/
Diamond
/
Dental Polishing
/
Absorption
اللغة:
En
مجلة:
The Journal of Advanced Prosthodontics
السنة:
2019
نوع:
Article