Ageing assessment of zirconia implant prostheses by three different quantitative assessment techniques
10.4047/jap.2019.11.5.253
- Author:
Phyu Phyu KYAW
1
;
Pong PONGPRUEKSA
;
Warangkana ANUCHITOLARN
;
Krongkarn SIRINUKUNWATTA
;
Kallaya SUPUTTAMONGKOL
Author Information
1. Faculty of Dentistry, Mahidol University, Rachathevi, Bangkok, Thailand. kallaya.sup@mahidol.ac.th
- Publication Type:Original Article
- Keywords:
Y-TZP ceramics;
Cyclic loading;
Phase transformation
- MeSH:
Prostheses and Implants;
Spectrum Analysis;
Titanium;
Water;
X-Ray Diffraction
- From:The Journal of Advanced Prosthodontics
2019;11(5):253-261
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To evaluate the influence of cyclic loading on phase transformation of zirconia abutments and to compare the effectiveness of three different quantitative ageing assessment techniques. MATERIALS AND METHODS: Thirty two Y-TZP prostheses fabricated from two brands, InCoris ZI and Ceramill ZI, were cemented to titanium bases and equally divided into two subgroups (n=8): control group without any treatment and aged group with cyclic loading between 20 N and 98 N for 100,000 cycles at 4 Hz in distilled water at 37℃. The tetragonal-to-monoclinic phase transformation was assessed by (i) conventional x-ray diffraction (XRD), (ii) micro x-ray diffraction (µXRD), and (iii) micro-Raman spectroscopy. The monoclinic-phase fractions (M%) were compared by two-way ANOVA. RESULTS: InCoris Zi presented significantly higher M% than Ceramill Zi in both control and aged groups (P<.001). Both materials exhibited significant phase transformation with monoclinicphase of 1 to 3% more in aged groups than controls for all thre e assessment techniques. The comparable M% was quantified by both µXRD and XRD. The highest M% was assessed with micro-Raman. CONCLUSION: Cyclic loading produced significant phase transformation in tested Y-TZP prostheses. The micro-Raman spectroscopy could be used as an alternative to XRD and µXRD.
