Effect of different surface treatment modalities on crystal structure and biaxial flexural strength of super translucent zirconia. | ||
| Egyptian Dental Journal | ||
| Article 26, Volume 67, Issue 2 - Serial Number 4, April 2021, Pages 1593-1599 PDF (592.74 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2021.64733.1523 | ||
| Authors | ||
| Lamia Dawood* 1; Mahy Hassouna2 | ||
| 1Associate Professor, Fixed Prosthodontics Dept., Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||
| 2Assistant Professor, Fixed Prosthodontics Dept., Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||
| Abstract | ||
| Objectives: To study the outcome of different surface treatments on X ray diffraction analysis (XRD) and flexural strength of super translucent zirconia. Materials and Methods: Forty identical discs were milled from presintered super translucent zirconia blank (VITA YZ ST, VITA Zahnfabrik, Germany). Specimens were classified into 4 groups according to the surface treatment used: Group C: no treatment (control group), Group S: discs were airborne particle, Group P: discs were treated with primer and Group SP: discs were airborne particle then, they were treated with primer. All specimens were subjected to XRD analysis and biaxial flexural strength test. Results: The highest biaxial flexural strength recorded value was for the C group (462.11±17.33 MPa) while the lowest one was recorded for S group (310.33±7.78 MPa). Applying one way ANOVA and Tukey test revealed a statistically significant difference among all tested groups. The XRD analysis of specimens that were treated with different surface treatments revealed the evolution of monoclinic phase transformation in groups S and SP. Conclusions: The airborne particle abrasion resulted in the evolution of tetragonal to monoclinic phase transformation on the zirconia surface which in turn negatively affected the flexural strength of super translucent zirconia. | ||
| Keywords | ||
| Super translucent zirconia; Biaxial flexure strength; Airborne particle abrasion; Primer; XRD | ||
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