Alexandre Roberto Heck

Avaliação da capacidade de dissolução de tecido pulpar bovino pelo hipoclorito de sódio em diferentes concentrações

Introductionsodium hypochlorite is the most used auxiliary chemical substance in endodontic treatment due to its antimicrobial action and its ability to dissolve organic matter.Objectivethe objective of the present study was to compare the dissolution speed of bovine pulp tissue fragments in different concentrations of sodium hypochlorite.Material and methodbovine pulp tissue fragments, with determined weight, were immersed in Becker bottles filled with 20 ml of sodium hypochlorite and placed in an incubator/stirrer. Concentrations of 1%, 2.5% and 5%, with pH of 11, at 36°C. Each sample was evaluated visually during the stirring, with the aid of magnifying glass, until its complete dissolution. The speed of dissolution of each fragment was determined in milligrams per minute and by the average speed of each group was analyzed by Kruskal-Wallis and Dunns Multiple statistical methods.ResultThere were statistically significant differences between the concentration of 1%, with the lowest speed, and others.ConclusionThe dissolution speed of sodium hypochlorite of tested concentrations, becomes faster with the increasing of the concentration.