Hemijska industrija 2012 Volume 66, Issue 1, Pages: 59-66
https://doi.org/10.2298/HEMIND110406069J
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Profilometric and SEM analyses of composite surfaces after excess cement removal
Jevremović Danimir P. (Department of Prosthetic Dentistry, School of Dentistry, Pančevo)
Ajduković Zorica R. (Department of Dentistry, Clinic for Prosthetic Dentistry Medical Faculty, Niš)
Stanković Saša D. (Department of Dentistry, Clinic for Prosthetic Dentistry Medical Faculty, Niš)
Radosavljević Radivoje D. (Department of Dentistry, Clinic for Prosthetic Dentistry, Faculty of Medicine, Kosovska Mitrovica)
Composite cements are widely used in dentistry, due to their positive
characteristics (bond strength, color, low solubility etc.). However, removal
of the cement presents one of the drawbacks of their use, since incomplete
removal might cause bacterial adhesion, gingival irritation and subsequent
inflammation. The aim of this study was to investigate surface
characteristics of the composite cements after different ways of excess
removal, by means of profilometric and SEM analysis. Thirty leucite
reinforced ceramic specimens were divided into three groups, based on the
manner of excess cement removal: Group 1 (polished): excess was fully
polymerized for 40 s, then removed; Group 2 (cleaned): excess was removed
with a cotton roll, after which cement was fully polymerized for 40 s; Group
3 (pre-polymerized): excess was light cured for 5 s, after which cement
excess was broken with an instrument and then fully polymerized for 40 s.
Surface roughness was measured using a surface profilometer. Subsequently,
specimens were inspected by a scanning electron microscope. The data were
statistically analyzed. The examination of variants of average values proved
the statistically significant difference in the height of average values per
group, p<0.0001; the statistically significantly highest values were for the
pre-polymerized group, whereas the statistically significantly lowest values
were for the polished group. Results of this study show that utmost attention
has to be paid to the excess removal procedure, since surface roughness
parameters directly depend on the choice of the applied technique.
Keywords: profilometric analysis, SEM analysis, composite cement, dental materials