Dog's pulp histological evaluation after pulpotomies whith cyanoacrylate and calcium hydroxide

Objective: to evaluate histological aspects of dog´s pulp-dentin complex when covered right after pulpotomies using ethyl-cyanoacrylate (Super Bonder) and calcium hydroxide. Methods: 24 teeth were divided into 2 groups of 12. Group 1 was categorized as the test group (ethyl-cyanoacrylate) and group 2 as the control group (calcium hydroxide). The teeth involved in the study were the second and third incisors, canines, second and third premolars. The pulpotomies were done in one appointment and the histological evaluation after 30 days. Results: In group 1, 83,3% and in group 2, 100% presented a hard tissue barrier (P=0,478). A continuous hard tissue barrier was observed in 60% of ethyl-cyanoacrylate group and 75% of calcium hydroxide group (P=0,652). The pulpar aspect of both groups showed 100% of moderate chronic inflamatory process. The groups were compared statistically using the Fisher Exact Test. Conclusion: the presence of hard tissue barrier in the control group was higher than in the test group, but this difference was not significant; the difference observed between the histological structure of barrier, continuous or non-continuous, were similar when compared between groups. A moderate chronic inflamatory process was found in all teeth, which were treated within 30 days.