Capacidad de disolución de tejido pulpar vital del hipoclorito de sodio al 5, 25% y clorhexidina al 2% / Dissolution capacity of pulp vital tissue by sodium hypochlorite 5, 25% and 2% chlorhexidine

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)

Disturbio neurosensorial del nervio dentario inferior asociado al tratamiento endodóntico de una tercera molar: reporte de caso / Neurosensory disturbances of mandibular nerve associated with endodontic treatment of a third molar: a case report

El disturbio neurosensorial del nervio dentario inferior es una complicación que puede ocurrir luego de realizar algunos procedimientos odontológicos como: exodoncia de dientes retenidos, colocación de implantes, y tratamientos endodónticos quirúrgicos y no quirúrgicos. Puede haber daño por injuria mecánica (sobrepase de instrumentos), injuria química (pasaje de hipoclorito o selladores endodónticos) e injuria térmica (sobrecalentamiento por procedimientos quirúrgicos). Los disturbios neurosensoriales del nervio dentario inferior pueden ocurrir aproximadamente 19,6% de procedimientos odontológicos, de los cuales, el 35,3% de debe a tratamientos endodónticos. Se presenta un caso de disturbio neurosensorial del nervio dentario inferior por un procedimiento endodóntico a una tercera molar inferior derecha. Debemos tener especial cuidado cuando se realizan estos tratamientos en molares inferiores por la proximidad del ápice radicular al nervio dentario inferior.

Neurosensory disturbance of the inferior alveolar nerve is a complication that can occur after performing some dental procedures such a extraction of impacted teeth, implants and surgical endodontic treatment and nonsurgical. There can be damage by mechanical injury (excess of instruments), chemical injury (passage of hypochlorite or endodontic sealers), and thermal injury (overheating for surgical procedure). Neurosensory disturbances of the mandibular nerve can occur in approximately 19.6% of dental procedures, of which 35.3% were due to endodontic treatment. A case of neurosensory disturbance of the inferior alveolar nerve due to an endodontic procedure of the right lower third molar was presented and the special care that must be taken when performing endodontic treatment on lower molar and its proximity to the root apex to the inferior alveolar nerve.