Akademik Veri Yönetim Sistemi
The 7th International Congress on Adhesive Dentistry, Konya, Türkiye, 1 - 03 Haziran 2023, cilt.1, sa.1, ss.114
Abstract
Objective
The aim of
this study was to evaluate the roughness of the surface of composite resins
applied with different finishing techniques and their color stability after coloring
with coffee.
Methods
A
total of 100 disc-shaped samples prepared from nanohybrid composite (Polofil
NHT, Voco [N]) and microhybrid composite (Herculite Classic, Kerr [M]) resin
were divided into 5 subgroups (n=10). One of the groups served as control group (no surface treatment).
Experimental groups were divided according to the surface finishing
protocol: bur+polishing (BP), arkansas+polishing (AP), bur+polishing
with paste (BPP), and discs+polishing (DP). The initial color of the samples was
detected with a spectrophotometer (VITA Easyshade V, VITA Zahnfabrik, Germany),
and the surface roughness (Ra) of the samples was quantified by a profilometer
(Mitutoyo SJ-210, Japan). Then the samples were exposed to the coloration
process with freshly prepared coffee solution every day. After 2 days, color
measurements were made again. Color change (∆E) was calculated using the
CIEDE2000 system. Mann-Whitney U test, Kruskal Wallis test and One-way analysis
of variance were used for statistical analysis. The correlation between Ra and
∆E was statistically evaluated.
Results
DP
treatment on the M surface and DP and BPP treatments on the N surface produced
significantly less Ra than the other treatments and the control group
(p<0.05). Although the BPP treatment in the M group had the lowest E value
compared to other treatments, there was no statistically significant difference
between this value and that of the BP and DP treatment groups (p>0.05). BPP
treatment demonstrated a significantly lower E value in the N group compared to
the other groups (p< 0.05). A statistically significant correlation was
found between Ra and ∆E values (p<0.05).
Conclusions
Composite
finishing techniques affected the surface roughness and color stability of
composites. The use of discs and polishing paste in the finishing of both
nanohybrid and microhybrid composites can reduce surface roughness and
discoloration due to coffee consumption.