RESUMO
Objetivo. Comprobar la capacidad de disolución de tejido pulpar vital de hipoclorito de sodio al 5.25% y Clorhexidina al 2% post instrumentación rotatoria. Material y método. Se analizaron treinta y dos primeros premolares superiores con vitalidad pulpar que se obtuvieron post exodoncia. Fueron agrupados en: grupo 1, irrigación con NaOCI 5,25%; grupo, 2, irrigación con CHX 2%; grupo 3 o control irrigación con suero fisiológico, seguidamente las piezas dentarias fueron instrumentadas con sistema de limas rotatorias, irrigadas con las soluciones descritas y posteriormente muestras histológicas fueron teñidas y finalmente observadas en microscopio óptico. Resultados. Mostraron que no hubo diferencia estadística significativa tanto en los grupos irrigados por NaOCI 5.25% y CHX 2% debido a que fueron encontrados tejido pulpar residual en todos los grupos. Los tercios coronarios fueron mayormente desprovisto de tejido pulpar que en los tercios apicales. La anatomía accesoria no fue desprovista de tejido pulpar. Conclusión. Aunque la CHX no tenga capacidad de disolver tejido pulpar y los resultados de este estudio no hayan demostrado diferencia estadística significativa en relación al NaOCI este resultado no se debe al efecto disolutorio de las soluciones irrigadoras sino a que el NaOCI no tuve suficiente tiempo de contacto con tejido pulpar (AU)
Aim. Of this study was to test the ability of vital pulp tissue dissolution of 5.25% sodium hypochlorite and 2% chlorhexidine after rotary instrumentation system. Material and methods. Thrity-two freshly extracted premolar teeth, with pulps vital at the time of extraction were assigned in groups. Group 1, 5.25% NaOCI irrigation, group 2, 2% CHX irrigtation, group 3 with distilled water irrigation as control. After to teeth were instrumented with rotary files system, irrigated with the solutions described and decalcified. Each root was divided in thirds and transverse histological sections were perfomed at four levels, then histological samples were stained and observed in microscope optical. Results. No statistically significant differences were found in both groups irrigated by 5.25% NaOCI and CHX 2% residual pulp tissue were found in all groups. Coronal parts were more frequently devoid of pulp tissue than the apical. The isthmus had residual pulp tissue less frequently in the NaOCI groups. Accessory anatomy was unaffected regardless of irrigant. Conclusions. Although CHX has no ability to dissolve pulp tissue and the results of this study were not statistically significantly compared to NaOCI. This results this is not due to the dissolving effect of irrigating solutions but that NaOCI did not have enough time contact with pulp tissue (AU)
