Abdelrahman El Sokkary1, Jylan Elguindy2* and Omnia El Shihi2
1Assistant Lecturer at Fixed Prosthodontics Department, Faculty of Oral and Dental Medicine, Egyptian Russian University, Egypt
2Professor at Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Egypt
*Corresponding Author: Jylan Elguindy, Professor at Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Egypt.
Received: December 13, 2017; Published: February 06, 2018
Citation: Jylan Elguindy., et al. “Effect of Surface Finish and Acidic pH Media on the Surface Roughness and the Color Stability of Zirconium Reinforced Lithium Silicate Glass Ceramics (An In-Vitro Study)”. Acta Scientific Dental Sciences 2.3 (2018).
Purpose: The aim of this study was to determine the effect of surface finish (Polishing and Auto-glazing) and the effect of acidic pH media on the surface roughness and color stability of Vita Suprinity.
Materials and Methods: A total of 76 Vita suprinity plates of 3mm thickness were cut by an isomet cutting machine. All specimens were sintered and auto-glazed according to manufacturer’s instructions. Half of the specimens was finished using a coarse grit diamond stone and then polished using the special polishing kit for Vita Suprinity. The other half was left with its glazed surface without any surface treatment. The samples were stored in 2% citric acid solution and artificial saliva as a control for 8 hours and 14 days respectively in an incubator at 37oC where the saliva was changed every 2 days. Color stability and surface roughness were measured before storage as baseline readings and after storage where the color stability was measured by using spectrophotometer. Surface roughness was calculated by using stylus profilometer.
Results: It was found that: Glazed samples stored in artificial saliva have lower mean value of ΔE and higher mean of surface roughness than polished samples stored in artificial saliva; Glazed samples stored in citric acid have higher mean value of ΔE and higher mean of surface roughness than polished samples stored in citric acid.
Conclusions: From the findings of our study, Ageing of Vita suprinity in acidic pH media (Citric acid solution) negatively affected both the color stability and surface roughness of Vita Suprinity. Surface finish was greatly affecting the surface roughness of Vita Suprinity.
Keywords: Vita Suprinity; Color Stability; Surface Roughness; Citric Acid; Surface Finish
Copyright: © 2018 Jylan Elguindy., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.