Radiographic and microbiologic evaluation of posttreatment apical and periapical repair of root canals of dogs' teeth with experimentally induced chronic lesion

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dc.contributor.authorLeonardo, Mário Roberto [UNESP]
dc.contributor.authorAlmeida, Walter Autonio [UNESP]
dc.contributor.authorIto, Izabel Yoko
dc.contributor.authorda Silva, Léa Assed Bezerra
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:17:57Z
dc.date.available2014-05-27T11:17:57Z
dc.date.issued1994-08-01
dc.description.abstractThe objective of the present study was to evaluate radiographically and bacteriologically apical and periapical repair in dogs' teeth with induced chronic periapical lesions with the use of two different operative techniques (techniques 1 and 2). The study was conducted on 40 root canals of upper and lower premolars from two dogs aged approximately 12 months. Periapical lesions were induced by leaving the root canals exposed to the oral environment for 5 days and then sealing them with zinc oxide-eugenol for 45 days. After this period, radiographic examination revealed the occurrence of a radiolucent lesion and endodontic treatment was started. The two techniques did not differ in terms of chemomechanical preparation, final filling, or type of cement, but differed in terms of irrigating solution and the presence of an antibacterial dressing. Thus 4% to 6% hypochlorite and hydrogen peroxide (10 volumes) were used in technique 1 during chemomechanical preparation and an antibacterial dressing based on calcium hydroxide was applied between sessions, whereas Dakin's fluid (0.5% sodium hypochlorite solution) and a final filling with no antibacterial dressing were used in technique 2. After chemomechanical preparation, the root canals were filled with gutta-percha cones and Sealapex (Sealapex-Sybron, Kerr, Sao Paulo, Brazil), and the animals were killed 270 days after the final filling. Blocks were cut into 6-μm sections and stained by the Brown and Brenn method. Radiographic, histomicrobiologic and statistical analysis permitted us to conclude the following: radiographically there was a marked reduction or even the disappearance of the radiolucent area present before treatment with greater success in the group treated with technique 1 (group I) than in the group treated with technique 2 (group II); the extent of bacterial invasion of dentinal tubules was greater and more intense in group II than in group I; and the amount of microorganisms detected in the ramifications of the apical delta and in the lumen of the root canal was intense in group II and mild or absent in group I. © 1994.en
dc.description.affiliationDiscipline of Endodontics School of Dentistry of Araraquara UNESP. Araraquara
dc.description.affiliationDiscipline of Endodontics School of Dentistry of Barretos UNESP. Araraquara
dc.description.affiliationDiscipline of Microbiology Faculty of Pharmaceutical Sciences of Ribeirão Preto USP. Araraquara
dc.description.affiliationDepartment of Clinical Pediatrics School of Dentistry of Ribeirão Preto USP. Araraquara
dc.description.affiliationUnespDiscipline of Endodontics School of Dentistry of Araraquara UNESP. Araraquara
dc.description.affiliationUnespDiscipline of Endodontics School of Dentistry of Barretos UNESP. Araraquara
dc.format.extent232-238
dc.identifierhttp://dx.doi.org/10.1016/0030-4220(94)90153-8
dc.identifier.citationOral Surgery, Oral Medicine, Oral Pathology, v. 78, n. 2, p. 232-238, 1994.
dc.identifier.doi10.1016/0030-4220(94)90153-8
dc.identifier.issn0030-4220
dc.identifier.scopus2-s2.0-0028488393
dc.identifier.urihttp://hdl.handle.net/11449/64495
dc.language.isoeng
dc.relation.ispartofOral Surgery, Oral Medicine, Oral Pathology
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectAnti Infective Agents
dc.subjectantiinfective agent
dc.subjectbiomedical and dental materials
dc.subjectcalcium hydroxide
dc.subjectcamphor
dc.subjectcamphorated parachlorophenol
dc.subjectchlorophenol
dc.subjectendotoxin
dc.subjecthydrogen peroxide
dc.subjecthypochlorite sodium
dc.subjectanimal
dc.subjectbacterial infection
dc.subjectcementum
dc.subjectchi square distribution
dc.subjectchronic disease
dc.subjectcomparative study
dc.subjectdentin
dc.subjectdog
dc.subjectdrug combination
dc.subjectendodontics
dc.subjectGram positive bacterium
dc.subjectisolation and purification
dc.subjectmethodology
dc.subjectmicrobiology
dc.subjectradiography
dc.subjecttooth periapical disease
dc.subjecttooth pulp
dc.subjectAnimal
dc.subjectAnti-Infective Agents
dc.subjectBacterial Infections
dc.subjectCalcium Hydroxide
dc.subjectCamphor
dc.subjectChi-Square Distribution
dc.subjectChlorophenols
dc.subjectChronic Disease
dc.subjectComparative Study
dc.subjectDental Cementum
dc.subjectDental Pulp Cavity
dc.subjectDentin
dc.subjectDogs
dc.subjectDrug Combinations
dc.subjectEndotoxins
dc.subjectGram-Positive Bacteria
dc.subjectHydrogen Peroxide
dc.subjectPeriapical Periodontitis
dc.subjectRoot Canal Irrigants
dc.subjectRoot Canal Therapy
dc.subjectSodium Hypochlorite
dc.titleRadiographic and microbiologic evaluation of posttreatment apical and periapical repair of root canals of dogs' teeth with experimentally induced chronic lesionen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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