Fabrication and Characterization of Dental Implants with Yttria- Stabilized Zirconia

Mohamad   Khodaei; Alireza  Valanezhad

doi:10.18502/ijds.v17i1.5909

Mohamad Khodaei Department of Materials Science and Engineering, Golpayegan University of Technology, Golpayegan, Iran.
Alireza Valanezhad Department of Dental and Biomedical Materials Science, Nagasaki University, Nagasaki, Japan

DOI: https://doi.org/10.18502/ijds.v17i1.5909

Keywords: Zirconium, Dental implant, Mechanics

Abstract

Introduction: Zirconium oxide or zirconia have been used for the fabrication of dental implants due to their biocompatibility, hardness, toughness, compressive strength and chemical stability. The aim of this study is investigating the effect of sintering time on the properties of zirconia dental implant.

Materials and Methods: In this research, which was performed at Department of Dental and Biomedical Materials Science, Nagasaki University, Nagasaki, Japan, at 2019, zirconia-yttria mol.% 3 powder was pressed and sintered at 1450^°C at different times (5 samples for each condition) and the effect of time on the phase, structural and mechanical properties of the sintered samples was investigated. One-way ANOVA statistical analysis was performed with the 0.05 level of significance using Graph Pad Prism 6 software.

Results: The results of XRD phase analysis show that sintering time change has a significant effect on the phase changes of the samples and the Vickers hardness of the samples shows a significant increase with increasing sintering time due to shrinkage and decrease in porosity of the samples. But the 12 hour times of sintering caused phase changes in the samples which is not desirable.

Conclusion: Therefore, for the fabrication of zirconia parts with minimum porosity and optimum hardness, a moderate sintering time (6 hours) is recommended.