Srpski arhiv za celokupno lekarstvo 2011 Volume 139, Issue 11-12, Pages: 722-727
https://doi.org/10.2298/SARH1112722J
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Influence of different bonding agents on marginal sealing quality of amalgam restorations
Jakovljević Ankica (Klinika za dentalnu patologiju i endodonciju, Stomatološki fakultet, Pančevo)
Pešić Dragana 
(Klinika za dentalnu patologiju i endodonciju, Stomatološki fakultet, Pančevo)
Popović Milica (Klinika za dentalnu patologiju i endodonciju, Stomatološki fakultet, Pančevo)
Melih Irena (Klinika za dentalnu patologiju i endodonciju, Stomatološki fakultet, Pančevo)
Introduction. Although advanced adhesive systems are in use, marginal
microleakage is one of the greatest problems of contemporary restorative
dentistry. Objective. The aim of this in vitro study was to evaluate the
influence of different bonding agents on the marginal sealing quality of
class II amalgam restorations. Methods. Forty freshly extracted human
premolar and molar teeth were divided into four groups with 10 teeth in each
one. Class II preparations were prepared and different adhesives were applied
as follows: group I - Amalgam Liner® (Voco); group II - ONE-STEP® PLUS
(Bisco); group III - PQ 1 (Ultradent). Group IV was used as a control,
without any bonding agent. Amalgam (Cavex Non Gamma 2, Cavex) was
hand-condensed into each preparation. Specimens were thermocycled 200 times
at the following temperatures: 5-7°C, 37°C and 57-59°C, and were then
immersed into 1% solution of gentian violet for 72 hours. The teeth were
sectioned longitudinally and microleakage was graded in the area of the
gingival and occlusal quantity rim using a binocular magnifying glass with 25
times magnification. Results. The highest microleakage was recorded in the
Amalgam Liner group; 1526.0 μm at the gingival wall and 694.5 μm at the
occlusal cavity wall. The lowest dye penetration was observed in the PQ1
group; 589.5 μm at the gingival wall, and 599.9 μm at the occlusal wall of
the restoration. ANOVA test showed that there was a statistically significant
difference of dye penetration values at the gingival wall among all
examination groups (p<0.01). No statistically significant differences were
found comparing microleakage values at the occlusal wall. Conclusion. Results
of this study showed that the best marginal sealing was accomplished by using
the PQ1 bonding agent.
Keywords: amalgam, microleakage, bonding agents