title: Degree of microleakage of some pit and fissure sealants: an in vitro study.
abstract: The purpose of this study was to evaluate and compare the degree of microleakage exhibited by five resin sealants (Concise, Helioseal, Durafil. Fissurit, Sci-Pharm) and a glass-ionomer sealant (Fuji Glass lonomer Type III). The fissure systems of the occlusal surfaces of freshly extracted teeth were opened using a pear-shaped bur; the preparations were confined to enamel. For each material, 14 teeth were prepared. From each group, seven teeth were thermocycled through 5 degrees, 37 degrees, 60 degrees and 37 degrees for 2000 cycles, and the other seven teeth were not thermocycled. All teeth were immersed in 0.5% solution of basic fuchsin dye for 48 hours. Each tooth was sectioned longitudinally in the buccolingual direction and three 1 mm-thick sections (distal, central and proximal) were obtained from each tooth. Each section was cleaned, examined, and photographed in a stereomicroscope. All the materials presented microleakage in both the thermocycled and non-thermocycled specimens; the degree of microleakage was greater in the thermocycled specimens. The results support the practice of opening up questionably carious fissures and removing caries (if present) before sealing.
authors.affiliation: Department of Operative Dentistry, Aristotle University of Thessaloniki, Greece.
authors.forename: S
authors.initials: S
authors.lastname: Theodoridou-Pahini
authors.forename: K
authors.initials: K
authors.lastname: Tolidis
authors.forename: Y
authors.initials: Y
authors.lastname: Papadogiannis
mesh_terms: D001641:Bicuspid; D003763:Dental Leakage / Q000517:prevention & control*; D005069:Evaluation Studies as Topic; D005899:Glass Ionomer Cements; D006801:Humans; D008963:Molar; D010895:Pit and Fissure Sealants; D019279:Resin Cements; D012117:Resins, Synthetic
chemical_list: D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D019279:Resin Cements; D012117:Resins, Synthetic