Analysis of the time required for dissolving the pulp tissue according to different methods of sodium hypochlorite activation

Resumo

To analyze the time required to dissolute
the pulp tissue under different methods of sodium hypochlorite
activation. Material and methods: 30 bovine pulp fragments, with
an approximate volume of 45 ± 5 mg were divided into three
experimental groups (n = 10). In group 1, only the fragments were
immersed in 15 ml of 2.5%sodium hypochlorite. In group 2, the
irrigant was manually stirred with an endodontic instrument type
K size 40. In group 3, we used the ultrasonic insert n.39, driven
by ultrasound device Jet Sonic Total. The time required for total
dissolution of bovine tissue was measured and recorded for statistical
analysis. Results and Conclusion: According to analysis of variance
(Anova), with p<0.05, Group 1 showed significantly higher dissolution
time than Groups 2 and 3. Moreover, no difference between the
use of ultrasound and manual activation of the irrigating solution
was found.