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, Page 170-174 PDF (319.74 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/adjalexu.2022.106257.1229 | ||||
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Authors | ||||
Yomna Ihab Rezeika 1; Yehia S. Aboushady2; Amir Azer 3 | ||||
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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