Abstract
Introduction: Sealing pits and fissures was introduced as an approach to prevent occlusal caries
for more than two decades. The aim of this study was to compare the microleakage of flow able
resin reinforced glass ionomer (Ionoseal) with other materials used as fissure sealants.
Methods: In this in vitro study, 50 premolar teeth of human free of any caries were selected.
Fissurotomy was done with fissure bur. The samples were randomly categorized into five groups
(Fissurit FX, Fuji II light-cured,Grandio flow, Ionoseal). Ionoseal was assessed by using two
methods: with and without etching and bonding agent prior to sealant application. After sealant
placement, all surfaces of the teeth except 2 mm area around the sealant margins were covered
with two layers of nail polish. The specimens were thermocycled, and they were sectioned after
immersing into a 0.5 % basic fuchsine solution. The amount of microleakage was examined by
stereomicroscope.
Results: The microleakage comparisons of groups indicated that Ionoseal without etching and
bonding application had significantly greater microleakage than the other groups (p0.05).
Conclusions: By considering isolation difficulties in children and observing high amount of
Ionoseal microleakage (without etching and bonding application), the samples need to be etched
and bonded like other resin-based materials before Ionoseal placement in order to achieve
clinically desirable microleakage outcomes.
Keywords: Dental leakage, Pit and fissure sealants, Glass ionomer cements