title: Microleakage and micromorphology of the resin-dentin interface in primary molars following different endodontic irrigation regimens.
abstract: The aim of this study was to evaluate the effect of two endodontic irrigants (2.5% sodium hypochlorite and 17% Ethylenediamintetraacetic acid) on the microleakage and micromorphology of the resin-dentin interface in pulpectomized primary molars. Standardized Class-II cavities were prepared in extracted, non-carious primary molars after which chemo-mechanical preparation of the root canals were performed in conjunction with K-Files and 2.5% sodium hypochlorite (NaOCl) between each file size. Final irrigation of the specimens were made with either 2.5 NaOCl, 17% Ethylenediamintetraacetic acid (EDTA) or with saline (control). The root canals were filled with a calcium hydroxide paste and the cavities were sub-grouped to be restored with one of the following materials: a: Amalgam, b: Prime&Bond NT (with prior total etch) and TPH resin-based composite, c: Prime&Bond NT and Dyract d: Prime&Bond NT (with Non-Rinse Conditioner pre-treatment); and e:Prompt L-Pop and F2000. Following thermocycling and 90-day water storage, the occlusal and gingival microleakage of restorations were assessed with dye penetration and image analysis. Separate specimens were processed for scanning electron microscopic investigation of the resin-dentin interface. The occlusal and gingival microleakage of the tested restorative systems was not affected by different irrigation regimens (p>0.05), while final restoration with Prime&Bond NT+TPH and Prompt L-Pop+F2000 resulted in the lowest microleakage values (p<0.05). Following the use of 17% EDTA for final flush, the latter two groups produced relatively thicker hybrid zones, when compared to the saline-irrigated specimens.
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
authors.forename: Burcu
authors.initials: B
authors.lastname: Togay
authors.forename: Atila
authors.initials: A
authors.lastname: Ataç
authors.forename: Zafer C
authors.initials: ZC
authors.lastname: Cehreli
mesh_terms: D000134:Acid Etching, Dental; D002126:Calcium Hydroxide / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003723:Dental Amalgam / Q000737:chemistry; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000648:ultrastructure*; D004202:Disinfectants / Q000737:chemistry; D004492:Edetic Acid / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008298:Maleates / Q000737:chemistry; D008422:Materials Testing; D008963:Molar / Q000648:ultrastructure*; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012388:Root Canal Irrigants / Q000737:chemistry*; D018915:Root Canal Preparation / Q000295:instrumentation; D012973:Sodium Hypochlorite / Q000737:chemistry; D013499:Surface Properties; D014094:Tooth, Deciduous / Q000648:ultrastructure*
chemical_list: D002614:Chelating Agents; D020770:Compomers; D003188:Composite Resins; D004202:Disinfectants; C088486:Dyract; C118368:F2000 cement; D005899:Glass Ionomer Cements; D008298:Maleates; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; C408584:Prompt L-Pop; D019279:Resin Cements; D012388:Root Canal Irrigants; C113300:TPH hybrid; C444699:non-rinse conditioner; D003723:Dental Amalgam; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D002126:Calcium Hydroxide