Journal of Isfahan Dental School

Effect of Repeated Firing on the Color Changes of Lithium Di-silicate with High and Low Translucency: An In-vitro Study

Document Type : مقاله‌های پژوهشی

Authors

1 Dental Materials Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

2 Department of Prosthodontics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran

3 Dental Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

4 Postgraduate, Student Research Committee, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Abstract

Introduction: Increasing patients' expectations about restorative therapies and the beauty of researchers encourages researchers to study more about materials and methods that have the desired appearance for patient satisfaction. The purpose of this study was to evaluate theeffect of repeated firing on color changes of lithium disilicate (with high and low translucency).
Materials and Methods: In this in-vitro study, 20 samples of high and low lithium disilicate were prepared forboth groups (n = 10). Samples were sectioned and polished to provide a thickness of 1mm. The specimens were subjected to firing for three times. The color coordinationafter the first and second firing were measured using spectrophotometer. Delta E was calculated between first and second firing.the data were analyzed by SPSS (version 16) stastical software (α = 0.05).
Results: The mean and standard deviation of low translucency was 1.342 ± 0.88 and high transcendental was 0.757 ± 0.49.Pair- wise comparison of color change prepared by three  times firing in lithium dicliate samples caused higher ΔE of LDS with low translucent significantly (p value = 0.019).
Conclusions: Multiple firing casued significantly higher color changes in lithium disilicate with low translucency than that of with high translucent.
Key Words: Color, Ceramics, Dental restoration, CAD/CAM

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Journal of Isfahan Dental School
Volume 15, Issue 1 - Serial Number 1
March 2019
Pages 9-16