title: The effect of different enamel surface treatments on the microleakage of fissure sealants.
abstract: The aim of this study was to evaluate the effects of different techniques of surface treatment on the microleakage of a fissure sealant in molar teeth. A total of 50 freshly extracted noncarious human third molars were randomly assigned to one of five groups. Occlusal fissures were treated with one of the following: acid etching with 35% orthophosphoric acid (group 1); fissurotomy with a Fissurotomy Micro NTF metal bur (group 2); laser etching with an Er,Cr:YSGG laser at 2 W and 20 Hz (group 3); laser etching with an Er,Cr:YSGG laser at 2 W and 40 Hz (group 4); and air abrasion for 20 s with 30-µm Al(2)O(3) particles via a CoJet Prep device (group 5). After surface pretreatment, a resin-based sealant was applied to the fissures. The sample teeth were subjected to thermocycling and stored in distilled water at 37°C for 1 month. Following immersion in 0.5% basic fuchsin solution for 24 h, three buccolingual slices of each sample tooth were scored under a stereomicroscope, and the morphological appearance of the area between the enamel surface and fissure sealant was examined under a scanning electron microscope. The Kruskal-Wallis test and one-way ANOVA revealed significant differences in marginal leakage, as follows: group 1 showed significantly lower scores than groups 2 and 5, the scores of groups 1, 3 and 4 were not significantly different, and group 2 showed significantly higher scores than groups 3 and 4. Laser irradiation, the metal bur, and the CoJet Prep device did not eliminate the need for acid etching of the enamel prior to placement of a fissure sealant. Laser etching at 2 W (20 Hz or 40 Hz) may be an alternative to conventional acid-etching.
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey. dtozgul@gmail.com
authors.forename: Ozgul
authors.initials: O
authors.lastname: Baygin
authors.forename: Fatih Mehmet
authors.initials: FM
authors.lastname: Korkmaz
authors.forename: Tamer
authors.initials: T
authors.lastname: Tüzüner
authors.forename: Mehmet
authors.initials: M
authors.lastname: Tanriver
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D020906:Air Abrasion, Dental / Q000379:methods; D003737:Dental Cavity Preparation / Q000379:methods; D003743:Dental Enamel / Q000187:drug effects / Q000528:radiation effects; D003763:Dental Leakage; D006801:Humans; D053844:Lasers, Solid-State; D008963:Molar / Q000187:drug effects / Q000528:radiation effects; D010756:Phosphoric Acids / Q000627:therapeutic use; D010895:Pit and Fissure Sealants
chemical_list: D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants; C030242:phosphoric acid