Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics
Mohamed, A., Mandour, M., Bayoumi, R. (2023). Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics. EKB Journal Management System, 10(4), -. doi: 10.58675/2974-4164.1608
Aya N. Mohamed; Mona H. Mandour; Rania E. Bayoumi. "Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics". EKB Journal Management System, 10, 4, 2023, -. doi: 10.58675/2974-4164.1608
Mohamed, A., Mandour, M., Bayoumi, R. (2023). 'Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics', EKB Journal Management System, 10(4), pp. -. doi: 10.58675/2974-4164.1608
Mohamed, A., Mandour, M., Bayoumi, R. Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics. EKB Journal Management System, 2023; 10(4): -. doi: 10.58675/2974-4164.1608

Effect of Sintering Parameters on Translucency, Flexural Strength1and Microstructure of Zirconia Ceramics

Al-Azhar Journal of Dentistry
Volume 10, Issue 4, October 2023
DOI: 10.58675/2974-4164.1608
Authors
Aya N. Mohamed1; Mona H. Mandour2; Rania E. Bayoumi3
1Demonstrator, Dental Biomaterial Department, Faculty of Dental Medicine for Girls, Al-Azhar University.
2Professor of Crowns and Bridges Faculty of Dental Medicine for Girls, Al-Azhar University.
3Assistant Professor of Dental Biomaterial Faculty of Dental Medicine for Girls, Al-Azhar University
Abstract
Purpose: This study was designated to evaluate the effect of sintering parameters on9translucency, flexural strength, and microstructure of zirconia ceramics. Material and Methods: A total of 30 Cubic Zirconia Discs (DD cubx2) (N=30) with-12-mm-diameter-andk1.2kmm thickness8shade A2 were8milled7using CAD/CAM. Discs were divided into three equal groups (n=10) according to different sintering temperatures Group (1) (1450 °C), Group-2 (1550°C), and Group-3-(1600°C) with a sintering holding time of 2 hours. The9contrast8ratio7(CR)9wasobtained9after0comparing7the3reflectance8of0light3through7the9specimens7over1black7and9white7backgrond using a Reflective spectrophotometer (Model RM200QC, X-Rite, Neu-Isenburg, Germany). Biaxial flexural strength was measured according to ISO 6782-2015 using a universal testing machine by piston-on-three ball technique. The grain size and microstructures of different groups were examined using SEM. Results: Group (1) (1450°C) showed significantly highest mean (CR) values followed by group (2) (1550°C). And group 3 (1600°C) showed the significant lowest mean values. In addition, Regarding the biaxial flexural strength, group (1) (1450°C), group 2 (1550°C), and group 3-(1600°C) showed insignificant mean values. SEM revealed an increase in grain size with increased sintering temperature. Conclusion: Increasing-the-sintering-temperature-of-zirconia-based ceramics will increase their translucency, without affecting their flexural strength.
Keywords
Biaxial Flexural Strength; translucency; sintering temperature
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