Rezeika, Y., Aboushady, Y., Azer, A. (2023). THE EFFECT OF DIFFERENT SINTERING CYCLES ON THE TRANSLUCENCY AND BIAXIAL FLEXURAL STRENGTH OF MONOLITHIC ZIRCONIA (IN VITRO STUDY). test, 48(1), 170-174. doi: 10.21608/adjalexu.2022.106257.1229
Yomna Ihab Rezeika; Yehia S. Aboushady; Amir Azer. "THE EFFECT OF DIFFERENT SINTERING CYCLES ON THE TRANSLUCENCY AND BIAXIAL FLEXURAL STRENGTH OF MONOLITHIC ZIRCONIA (IN VITRO STUDY)". test, 48, 1, 2023, 170-174. doi: 10.21608/adjalexu.2022.106257.1229
Rezeika, Y., Aboushady, Y., Azer, A. (2023). 'THE EFFECT OF DIFFERENT SINTERING CYCLES ON THE TRANSLUCENCY AND BIAXIAL FLEXURAL STRENGTH OF MONOLITHIC ZIRCONIA (IN VITRO STUDY)', test, 48(1), pp. 170-174. doi: 10.21608/adjalexu.2022.106257.1229
Rezeika, Y., Aboushady, Y., Azer, A. THE EFFECT OF DIFFERENT SINTERING CYCLES ON THE TRANSLUCENCY AND BIAXIAL FLEXURAL STRENGTH OF MONOLITHIC ZIRCONIA (IN VITRO STUDY). test, 2023; 48(1): 170-174. doi: 10.21608/adjalexu.2022.106257.1229

THE EFFECT OF DIFFERENT SINTERING CYCLES ON THE TRANSLUCENCY AND BIAXIAL FLEXURAL STRENGTH OF MONOLITHIC ZIRCONIA (IN VITRO STUDY)

Alexandria Dental Journal
Article 7, Volume 48, Issue 1, April 2023, Pages 170-174    PDF (319.74 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2022.106257.1229
Authors
Yomna Ihab Rezeika* 1; Yehia S. Aboushady2; Amir Azer3
1Faculty of dentistry, University of Alexandria
2conservative Department,Faculty of Dentistry , Alexandria ,Egypt
3Lecturer, Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University.
Abstract
Background: In order to make zirconia a chair-side option, it was essential to reduce the sintering time without altering the material’s physico-mechanical properties.
The aim of the study: This study aims to evaluate the effect of speed and super-speed sintering compared to conventional sintering on monolithic zirconia, regarding the translucency and biaxial flexure strength.
Materials and methods: Forty-five 15 mm x 1.5 mm Y-TZP zirconia discs were fabricated and divided into three groups (n=15) according to sintering time; group SS: super-speed sintering, group S: speed sintering and group CV: conventional long-term sintering. The specimens were tested for any changes in translucency, then subjected to a biaxial flexure strength test.
Results: Conventional, speed and superspeed sintering revealed no significant difference in the biaxial flexure strength of the zirconia discs. However, super-speed sintering produced the least translucent specimen followed by conventional sintering, and speed sintering gave the best results.
Conclusion: Zirconia can be used as a chairside material using the superspeed sintering protocols for restoration in the non-aesthetic zone. Longer sintering protocols are essential to obtain highly translucent restorations.
Keywords
zirconia; speed sintering; strength; translucency
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