title: SEM analysis of smear layer removal after manual and automated handpiece root canal preparation.
abstract: Scanning electron microscopy was used to analyze the smear layer removal after root canal preparation by a manual technique and by an automated handpiece, the Canal Finder System (CFS). When 1% sodium hypochlorite was used as the irrigating solution, both manual and CFS techniques showed root canal walls with a dense smear layer obscuring the dentinal tubules entrance plus a large amount of debris. Root canal walls of the group of teeth treated with a chelating agent (EDTA) for 5 min and a final flush, after the preparation, with 1% sodium hypochlorite as an irrigating solution showed the cervical, middle and apical thirds extremely smooth and clear.
authors.affiliation: Departamento de Endodontia, Faculdade de Odontologia, Universidade Federal do Paraná, Curitiba, PA, Brasil.
authors.forename: G B
authors.initials: GB
authors.lastname: Sydney
authors.forename: A
authors.initials: A
authors.lastname: Batista
authors.forename: C
authors.initials: C
authors.lastname: Estrela
authors.forename: H F
authors.initials: HF
authors.lastname: Pesce
authors.forename: L L
authors.initials: LL
authors.lastname: de Melo
mesh_terms: D003754:Dental High-Speed Equipment; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D004492:Edetic Acid; D005069:Evaluation Studies as Topic; D006801:Humans; D007180:Incisor; D008855:Microscopy, Electron, Scanning; D012388:Root Canal Irrigants; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods*; D016369:Smear Layer; D012973:Sodium Hypochlorite; D014092:Tooth Root / Q000648:ultrastructure
chemical_list: D012388:Root Canal Irrigants; D004492:Edetic Acid; D012973:Sodium Hypochlorite