Effects of the addition of titanium dioxide and silaned silica nanoparticles on the color stability of a maxillofacial silicone elastomer submitted to artificial aging
Abstract
Objectives: Silicone elastomers require replacement due to degradation of mechanical
properties and deterioration in color over time. Recently, various nanoparticles have been
incorporated into the silicones to reinforce their physical and mechanical properties. The
purpose of this study was to evaluate the effect of nanosized particle addition on the color
stability of a commercial RTV maxillofacial silicone elastomer submitted to an accelerated aging.
Materials and Methods: The nanosized particles (titanium dioxide and silaned silica) were
added, 10% by volume, into a maxillofacial elastomer. The samples (n=10) were polymerized in an
oven according to the manufacturer’s recommendations. Color measurements were performed
using digital spectrophotometry according to the CIE L*a*b* color system. The samples were
subsequently placed into an aging chamber for 168 h. The second color measurement of the
samples was performed after the aging process. Data obtained from the measurement was
recorded and assessed by (ANOVA) (α=0.05).
Results: The highest color stability was obtained with the silica and the TiO2 group samples;
the lowest color stability was obtained with the control group samples in this study. However;
no statistically significant difference in discoloration was observed in the ΔE values between the
groups (p > 0.05).
Conclusions: The results of this pilot study revealed that the addition of nanosized TiO2
and silica particles used as reinforcing agents did not cause any color degradation of an
A-2000 silicone during the first 2 months. Further studies should be done on the effect of such
nanoparticles in long term aging procedures on the color stability of maxillofacial elastomers.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Authors
Pinar Cevik
GAZI UNIV
Publication Date
January 3, 2016
Submission Date
December 6, 2016
Acceptance Date
November 19, 2015
Published in Issue
Year 2016 Volume: 19 Number: 1