ABSTRACT
Objectives: The aim of this study was to investigate the effects of fiber-reinforced
resin burs on
the surface roughness of a nanofilled composite.
Methods: Average surface roughness values (Ra, �m) were measured using a surface profilometer
and surface textures after finishing procedures were evaluated using a scanning electron
microscope (SEM). Thirty cylindrical specimens were prepared using sectional teflon
molds. A nanofilled composite was chosen. After the preparation specimens were divided
into three subgroups randomly. After profilometric measurements, representative samples
of the mentioned finishing procedures were selected and SEM analyses were carried
out.
Results: Mylar strip group was statistically different from the other two groups (P<.05).
The smoothest surfaces occurred when composite resin samples were light cured against
the strips. On the other hand there was no statistical difference between fiber-reinforced
resin burs and Sof-Lex discs (P>.05). For fiber-reinforced resin burs scratches and
pitting which may be due to plucking of
the filler particles during finishing were observed on the surface topography of the
composite resin material. On the other hand, for the Sof-Lex discs although scratches
were noticed on the surface topography, no pitting was observed.
Conclusions: Fiber-reinforced resin burs can be preferred for the grinding of composite
surplus
in interproximal surfaces, where the use of Sof-Lex discs can be harmful to soft tissues.
(Eur J Dent
2008;2:96-101)
Key words:
Fiber-reinforced resin burs - Nanofilled composite - SEM - Sof-Lex discs; Surface
roughness.
