Affiliation:
1. Department of Oral and Maxillofacial Prosthodontics, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
2. Department of Restorative Dentistry, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
Abstract
The study examines the microhardness of five ceramic materials using CAD-CAM technology. Twenty-five disc-shaped specimens for the study, using I.P.S. Empress CAD (fully sintered), I.P.S. e.max CAD (30 minutes) and Vita Suprinity (26 minutes) milled in a pre-crystallized stage, Coprasmile
(8 hours), and Zenostar milled in partially sintered stage (9 hours and 50 minutes). Each specimen had ten indentations, with a 1000-gram load applied for 10 seconds using a Vickers diamond indenter. Vickers values were automatically converted to microhardness using the formula Hv = 1.8544×F/d2.
IBM SPSS 26 for statistical analysis, calculating microhardness values for each group. One-way ANOVA and Tukey HSD posthoc test compared differences between ceramic groups at a P <0.05 significance level. Results showed significant differences among the means (P <0.05),
with Coprasmile, Zenostar, and Suprinity groups having the highest and lowest values, respectively.
Publisher
American Scientific Publishers
Subject
Biomedical Engineering,Medicine (miscellaneous),Bioengineering,Biotechnology