Purpose:
This study aimed to investigate the discoloration of four types of dental porcelain
systems (feldspathic, monolithic zirconia, lithium disilicate, and leucite glassceramic)
with various surface treatments (glazed and mechanically polished) after
undergoing chewing simulation against a natural tooth antagonist.
Materials and methods:
Disc-shaped porcelain groups (9x3mm) were produced for the following categories:
feldspathic glazed (FG), feldspathic mechanically polished (FM), zirconia glazed
(ZG), zirconia mechanically polished (ZM), lithium disilicate glazed (ExG), lithium
disilicate mechanically polished (ExM), leucite glass-ceramic glazed (EG), and leucite
glass-ceramic (EM). In vitro chewing simulation was conducted on all porcelain
groups, and a spectrophotometer was used to compare the color changes between
their initial states.
Results:
The ΔE values (discoloration) of all porcelain samples were statistically different
(p <0.05), and the ΔE values of the glazed samples were higher than those of the
mechanically polished samples.
Conclusion:
All the glazed samples are more likely to show more color change than the
mechanically polished sample groups.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.