Abstract
Statement of problem
Although various surface sealant agents are available and recommended for chairside
polishing procedures, their effect on the surface roughness and color stability of
denture teeth is not clear.
Purpose
The purpose of this in vitro study was to evaluate the effect of sealant agents on
the surface roughness and color stability of various denture tooth materials.
Material and methods
Eighty disk-shaped specimens were prepared for each type of denture tooth material
(SR Vivodent, PMMA; Vitapan, reinforced-PMMA; SR Phonares II, composite resin). The
specimens were assigned to 4 groups according to the surface treatment used (n=20):
surface sealant agents (Palaseal; Heraeus Kulzer GmbH, Optiglaze; GC Corp Biscover;
Bisco Inc) and a conventional laboratory polishing technique (control group). A thermal
cycling procedure was applied for half of the specimens (n=10). The surface roughness
(Ra) values of thermocycled and nonthermocycled specimens were measured with a profilometer.
The CIELab color parameters of both thermocycled and nonthermocycled specimens were
measured with a spectrophotometer at baseline and after 7-day storage in a coffee
solution. The color differences were calculated from the CIEDE2000 (ΔE00) formula. Data were statistically analyzed with 3-way ANOVA and the Tukey HSD test
(α=.05).
Results
The type of tooth material, surface treatment technique, and their interactions were
significant for Ra values, and each variable and their interactions were also significant for ΔE00 values (P<.05). Thermal cycling had a significant effect only on ΔE00 values (P<.05).
Conclusions
Palaseal and Optiglaze sealant agents provided smoother and more color-stable denture
tooth surfaces than the conventional polishing technique. The use of the Biscover
agent with SR Vivodent and Phonares II teeth increased the Ra values. The color of conventionally polished SR Vivodent and Phonares II teeth changed
more with thermal cycling.
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Article info
Publication history
Published online: April 22, 2015
Identification
Copyright
© 2015 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.
