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Braz. dent. j ; 18(4): 281-288, 2007. ilus, tab
Article in English | LILACS | ID: lil-474465

ABSTRACT

The purpose of this study was to evaluate the influence of coronal leakage on the healing of dogs' periapical tissues after root canal filling, post space preparation and protection or not with a temporary sealer plug. Forty root canals of dogs' teeth were instrumented and filled by the lateral condensation technique with gutta-percha points and Endomethasone or CRCS sealers. After post space preparation, the remaining filling material was protected or not with a plug of temporary Coltosol sealer and exposed to the oral environment for 90 days. Thereafter, the animals were sacrificed and the specimens were removed and prepared for histomorphological and histobacteriological analysis. The findings revealed 35 percent of microbial leakage in the groups without plugs and 15 percent of leakage in the groups with plugs. Statistical analysis showed that the use of a Coltosol plug improved significantly the histomorphological results regardless of the type of root canal sealer (p=0.05) and that CRCS and Endomethasone sealers showed similar results (p>0.05).


O propósito deste trabalho foi avaliar a influência da infiltração coronária no reparo dos tecidos periapicais após obturação dos canais radiculares, preparo para pino e proteção ou não de um "plug" de cimento temporário. Quarenta canais de dentes de cães foram instrumentados e obturados pela técnica da condensação lateral ativa com cones de guta-percha e os cimentos Endomethasone e CRCS. Após preparo para pino os remanescentes do material obturador foram protegidos ou não com um "plug" do cimento temporário Coltosol e expostos ao meio oral por 90 dias. Decorrido este período, os animais foram mortos e os espécimes foram removidos e preparados para análises histomorfológica e histobacteriológica. Foi observado 35 por cento de casos de infiltração bacteriana nos grupos sem "plug" e 15 por cento nos grupos com "plug". Concluiu-se estatisticamente que o "plug" de Coltosol foi eficiente no controle da infiltração coronária de microorganismos (p=0,05), e que os cimentos CRCS e Endomethasone apresentaram resultados semelhantes (p>0,05).


Subject(s)
Animals , Dogs , Dental Pulp Cavity/pathology , Post and Core Technique , Periapical Tissue/pathology , Protective Agents/therapeutic use , Root Canal Obturation/methods , Calcium Hydroxide/therapeutic use , Calcium Sulfate/therapeutic use , Drug Combinations , Dental Cementum/pathology , Dental Leakage/microbiology , Dental Pulp/pathology , Dentin/pathology , Dexamethasone/therapeutic use , Formaldehyde/therapeutic use , Gram-Negative Bacteria/isolation & purification , Gram-Positive Bacteria/isolation & purification , Gutta-Percha/therapeutic use , Hydrocortisone/therapeutic use , Periodontal Ligament/pathology , Root Canal Filling Materials/therapeutic use , Root Canal Preparation/instrumentation , Root Canal Preparation/methods , Thymol/analogs & derivatives , Thymol/therapeutic use , Tooth Apex/pathology , Wound Healing/physiology , Zinc Oxide/therapeutic use , Zinc Sulfate/therapeutic use
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