Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics
Abdallah, S., Motawea, I., Abdel Ghany, M., Amin, R. (2020). Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics. EKB Journal Management System, 7(2-C), 213-227. doi: 10.21608/adjg.2020.14226.1189
Shahenda A. Abdallah; Inas T. Motawea; Mostafa M. Abdel Ghany; Rania A. Amin. "Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics". EKB Journal Management System, 7, 2-C, 2020, 213-227. doi: 10.21608/adjg.2020.14226.1189
Abdallah, S., Motawea, I., Abdel Ghany, M., Amin, R. (2020). 'Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics', EKB Journal Management System, 7(2-C), pp. 213-227. doi: 10.21608/adjg.2020.14226.1189
Abdallah, S., Motawea, I., Abdel Ghany, M., Amin, R. Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics. EKB Journal Management System, 2020; 7(2-C): 213-227. doi: 10.21608/adjg.2020.14226.1189

Phase Transformation, Surface Topography and Mechanical Properties of Hydrothermal Aged Laser treated Cubic Versus Tetragonal Zirconia Ceramics

Al-Azhar Dental Journal for Girls
Article 8, Volume 7, 2-C, April 2020, Page 213-227  XML PDF (1.58 MB)
Document Type: Original Article
DOI: 10.21608/adjg.2020.14226.1189
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Authors
Shahenda A. Abdallah email 1; Inas T. Motawea2; Mostafa M. Abdel Ghany3; Rania A. Amin4
1Assistant Lecturer of Dental Biomaterials, Faculty of Dental Medicine for Girls, Al-Azhar University, Egypt.
2Professor of Dental Biomaterial, and Vice Dean of Post Graduated studies and Researches, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.
3Professor of Removable Prosthodontics, and Dean of Faculty of Dental Medicine for Girls Al-Azhar University, Cairo, Egypt.
4Assistant Professor of Crowns and Bridges, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.
Abstract
Purpose: This study was carried out to compare the effect of laser surface treatment on cubic and tetragonal zirconia ceramics regarding; phase transformation tetragonal-monoclinic (T-M), surface topography, mechanical properties and biaxial flexural strength before and after low thermal degradation (LTD) aging. Materials and Methods: sixty discs (N=60) of CAD/CAM zirconia were used in this study. These specimens were divided into two main groups according to type of zirconia. Group I: (n=30) Cubic Zirconia (DD cubeX2), while Group II: (n=30) Tetragonal zirconia (Superfect-Zir). Then each group further subdivided into two subgroups according to surface treatment, subgroup (1): control without surface treatment, subgroup (2): laser surface treatment .Specimens form each subgroups were tested for the following; Phase transformation, surface topography, and mechanical properties before and after Low Thermal Degradation (LTD) aging test. Results: Statistical analysis revealed that there was a statistical significant difference between the two tested groups regarding the surface topography, biaxial flexural strength, and surface hardness. Also there was a statistical significant difference regarding the surface treatment and before/after LTD and laser among the tested zirconia ceramics. Conclusions: laser surface treatment improved the properties of tetragonal / cubic zirconia, and increases their resistance to low thermal degradation LTD aging.
Keywords
Cubic Zirconia; Thermal Degradation; Laser Surface Topography; Biaxial Flexural Strength
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