Color and translucency of repressed lithium disilicate glass ceramic subjected to multiple firings and aging
Color and translucency of ceramics
DOI:
https://doi.org/10.4322/bds.2022.e3226Abstract
Objective: The aim of this study is to evaluate the effect of multiple firings and aging on color and translucency of
repressed lithium disilicate glass ceramic (IPS e.max press). Material and Methods: A total of 42 lithium disilicate
discs (15 mm x 1 mm) were fabricated using heat press technique following the manufacturers’ instructions.
They were divided into three groups according to the number of pressing cycles (n=14): Group P1 (pressed
once), Group P2 (pressed twice) and Group P3 (pressed thrice). Each group was subdivided into two subgroups
according to the number of firing cycles (n=7): Subgroup (F2): 2 firing cycles, Subgroup (F4): 4 firing cycles.
Then all specimens were subjected to thermocycling. Color and translucency parameter (TP) were evaluated by
spectrophotometer; after pressing, firing (E1: color difference between pressing and firing) and aging (E2:
color difference between pressing and aging). Results: E1 for subgroup F2 (3.38) showed statistically significant
lower value than E1 for subgroup F4 (3.94). After aging, group P3 showed the statistically significant highest
E2 (6.41). A statistically significant lower E2 was found with group P2 (5.55). Group P1 showed the statistically
significant lowest E2 (4.28). TP for subgroup F2 (18.27) showed higher value than subgroup F4 (17.78). There
was a statistically significant decrease in TP after aging for all tested groups. Conclusion: Increasing the number
of firing cycles and aging affected color and translucency of repressed lithium disilicate.
KEYWORDS
Aging; Ceramics; Color; Repressing; Translucency.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.
=================
COPYRIGHT TRANSFER AND RESPONSIBILITY STATEMENT
(PDF)
For all articles published in the BDS journal, copyright is retained by the authors. Articles are licensed under an open-access Creative Commons CC BY 4.0 license, meaning that anyone may download and read the paper for free. In addition, the article may be reused and quoted, provided that the original published version is cited. These conditions allow for maximum use and exposure of the work while ensuring that the authors receive proper credit. All metadata associated with published articles is released under the Creative Commons CC0 Universal Public Domain Dedication.
Before the submission, authors must obtain permission to reproduce any published material (figures, schemes, tables, or any extract of a text) that does not fall into the public domain or for which they do not hold the copyright. Permission should be requested by the authors from the copyright holder (usually the Publisher, please refer to the imprint of the individual publications to identify the copyright holder).
The authors hereby attest that the study is original and does not present manipulated data, fraud, or plagiarism. All names listed made a significant scientific contribution to the study, are aware of the presented data, and agree with the final version of the manuscript. They assume complete responsibility for the ethical aspects of the study.
This text must be printed and signed by all authors. The scanned version should be submitted as supplemental file during the submission process.
