title: Evaluation of microleakage of root canal fillings irradiated with different output powers of erbium, chromium:yttrium-scandium-gallium-garnet laser.
abstract: This study evaluated the root canal seal achieved by irradiation with an erbium, chromium:yttrium-scandium-gallium-garnet laser, and the optimal output power to remove debris and the smear layer were determined. One hundred mandibular premolar teeth were prepared and divided into four groups. Group 1 was not lased but was irrigated with 5 mL of 5.25% NaOCl and 5 mL of 17% ethylenediaminetetraacetic acid. Group 2 was irradiated at a panel setting of 1 W, group 3 at 2 W and group 4 at 2.5 W, with a 50% water level and 48% air-cooling level. Root canals were obturated by cold lateral compaction, and apical microleakage was measured using a fluid filtration model. The remaining debris and smear layer were evaluated via scanning electron microscopy. Statistically significant differences were detected between groups. Irradiation at 1 and 2 W using an erbium, chromium:yttrium-scandium-gallium-garnet laser produced a seal superior to that of the other treatments.
authors.affiliation: Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Dicle, Diyarbakir, Turkey. senemygt@hotmail.com
authors.forename: Senem Yiğit
authors.initials: SY
authors.lastname: Özer
authors.forename: Emine
authors.initials: E
authors.lastname: Basaran
mesh_terms: D003763:Dental Leakage / Q000145:classification*; D003786:Dental Pulp Cavity / Q000528:radiation effects / Q000648:ultrastructure; D003804:Dentin / Q000528:radiation effects / Q000648:ultrastructure; D004492:Edetic Acid / Q000627:therapeutic use; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000295:instrumentation*; D008855:Microscopy, Electron, Scanning; D011879:Radiotherapy Dosage; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000295:instrumentation*; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D019227:Tooth Apex / Q000473:pathology
chemical_list: D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D006171:Gutta-Percha; D004492:Edetic Acid; D012973:Sodium Hypochlorite