ABSTRACT
Objectives: The effects
of three different surface finishing methods and aging on the surface roughness and optical properties of zirconia-reinforced
lithium silicate (ZLS) glass-ceramic were investigated.
Materials and
Methods: Rectangular specimens (0.6 mm thickness) were sliced
from ZLS blocks (N=36). Three different types of surface finishing [glazing combined
with crystallization (ZLS-CF) or after crystallization (ZLS-G) and polishing
(ZLS-P)] (n=12) and 5000 thermocycles were applied. Three sets of measurements were
performed before and after aging to determine the color coordinates and surface roughness (Ra) by using a colorimeter and
profilometer, respectively. The mean surface roughness (Ra) values were
calculated. Color differences and translucency parameter (TP) values were
calculated using the color difference ΔEab and TP formulas. ANOVA
was used to analyze the color difference, translucency, and surface roughness values
(α=.05).
Results: Significant
differences in the ΔE values were not observed (P=.736) for specimens with different types of surface finishing. A
significant difference was observed between the translucency values for different
surface finishing groups before aging (P<.001).
A significant difference in the surface roughness data between samples with different
kinds of surface finishing was observed both before and after aging (P<.001). The ZLS-P group exhibited lowest
surface roughness values before and after aging (P<.001). A positive significant correlation between the ΔE and
translucency change values was observed in both the ZLS-G (P=.005) and ZLS-P (P<.001)
groups.
Conclusions:
The surface finishing type did not affect the color change of ZLS
glass-ceramic. The translucency values for different surface finished ZLS glass-ceramic
specimens changed before aging. After aging, the surface finishing did not
affect the translucency of ZLS glass-ceramic. All tested groups exhibited surface
roughness values higher than the plaque accumulation threshold (Ra=0.2 mm).
Primary Language | English |
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Subjects | Health Care Administration |
Journal Section | Original Research Articles |
Authors | |
Publication Date | March 13, 2019 |
Submission Date | December 25, 2018 |
Published in Issue | Year 2019Volume: 22 Issue: 1 |
Cumhuriyet Dental Journal (Cumhuriyet Dent J, CDJ) is the official publication of Cumhuriyet University Faculty of Dentistry. CDJ is an international journal dedicated to the latest advancement of dentistry. The aim of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of dentistry. First issue of the Journal of Cumhuriyet University Faculty of Dentistry was published in 1998. In 2010, journal's name was changed as Cumhuriyet Dental Journal. Journal’s publication language is English.
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