title: Microleakage evaluation of a flowable polyacid-modified resin composite used as fissure sealant on air-abraded permanent teeth.
abstract: This study evaluated the microleakage of a flowable polyacid-modified resin composite used as a fissure sealant on air-abraded teeth in comparison to a resin-based fluoride sealant. Sixty extracted human third molars were divided into six subgroups (n = 10) under two main groups (fissure sealant materials). The occlusal surfaces of the teeth were air-abraded at 80 psi using 50 microm particles of aluminum oxide for 30 seconds, followed by rinsing and drying. Delton FS+ (Dentsply International) and Dyract Flow (Dentsply DeTrey) were applied to the teeth in subgroups following application of: a) an acid etching and bonding agent, b) bonding agent alone or c) air-abrasion alone, respectively. Acid etching (Delton EZ Etch, Dentsply International) and bonding agent application (Prime & Bond NT, Dentsply DeTrey) were done according to the manufacturers' instructions. The teeth were thermocycled for 500 cycles between 5 degrees C and 55 degrees C with dwell time of 15 seconds. Basic fuchsin (0.5%) staining followed by buccolingual sectioning was performed. Microleakage was evaluated at 20x optical magnification. Kruskal-Wallis test was used to make comparisons among six subgroups. Pairwise comparisons were done with the Mann-Whitney U test with the level of significance set as alpha = 0.05. Dyract Flow application as a fissure sealant on air-abraded permanent teeth in combination with acid etching and/or bonding agent provided microleakage results comparable to Delton FS+. Results also showed that the use of air abrasion, alone, resulted in significantly higher microleakage scores.
authors.affiliation: Department of Pedodontics, Hacettepe University, Faculty of Dentistry, Ankara, Turkey. cemgungor@hotmail.com
authors.forename: H Cem
authors.initials: HC
authors.lastname: Güngör
authors.forename: Melek D
authors.initials: MD
authors.lastname: Turgut
authors.forename: Nuray
authors.initials: N
authors.lastname: Attar
authors.forename: Nil
authors.initials: N
authors.lastname: Altay
mesh_terms: D000134:Acid Etching, Dental; D000537:Aluminum Oxide / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D003743:Dental Enamel / Q000473:pathology*; D003763:Dental Leakage / Q000145:classification*; D003777:Dental Prophylaxis / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D006801:Humans; D016555:Matched-Pair Analysis; D008422:Materials Testing; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D020770:Compomers; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C088486:Dyract; D010895:Pit and Fissure Sealants; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D017438:Bisphenol A-Glycidyl Methacrylate; D000537:Aluminum Oxide; D005459:Fluorides