Volume do corante rodamina b a 1% infiltrado na região apical, via forame, quando da obturação dos canais radiculares pelos cimentos ah plus, sealer 26 e N-rickert.

Abstract

This study aimed to evaluate in vitro the volume of the dye that penetrated into canals prepared with Protaper Universal rotary system, irrigated with 2.5% sodium hypochlorite, waterproofed externally with ethyl cyanoacrylate and filled by conventional technique with AH Plus, Sealer 26 and N-Rickert cements and gutta percha Protaper. Forty five upper and lower single-rooted human canines were used. The teeth were randomly divided into three groups of 15 teeth each: G1 - AH Plus, G2 - Sealer 26 and G3 - N-Rickert Sealer. The tooth crowns of the three groups were removed with carborundum disc at a 17 mm lenght and the teeth were weighed on a precision balance, setting the IW (initial weight). The specimens of the three groups were immersed in a 1% Rhodamine B solution for 72 hours in labeld ependorf tubes and vacuum environment. After the experimental period, the teeth were rinsed abundantly in tap water and weighed again, thus setting the FW (final weight). The difference between IW and FW determined the weight of the infiltrated dye in the three groups. That said, the weight of each tooth of the three groups were converted into volume of apical leakage through the following formula V = W/d, where W is the weight of the infiltrated volume (mean) of each tooth and d is the density of 1% Rhodamine B dye used in the experiment. The results showed no statistical difference between the groups analyzed.