Eficacia del chitosan en la remoción del hidróxido de calcio de conductos radiculares en dientes bovinos

Abstract

Objective: To compare the efficiency of Chitosan at 0.2% and EDTA at 17% in the removal of calcium hydroxide prepared in different vehicles. Materials and methods: 132 bovine incisors were prepared, the teeth were divided longitudinally and in the apical portion a groove was made that was filled with calcium hydroxide in oily or viscous vehicle according to the corresponding randomization, later they were reassembled and incubated to 37 ° C and 100% relative humidity for 7 days, then the specimens from each group were subdivided into two for irrigation with: 0.2% Chitosan and 17% EDTA. The evaluation of removal efficiency was performed with two observers using a scoring system described by van der Sluis. The tabulation and data analysis was performed in "SPSS vs.21" and the statistical test "Chi Square". Results: There was a significant difference between the two chelators when they were used to remove calcium hydroxide associated with propylene glycol (Calen), with Chitosan being 0.2% more effective (p<0.0001). But there was no significant difference for the removal of calcium hydroxide prepared with silicone oil (Metapex) (p=0.462). Conclusions: No chelator was sufficient to completely eliminate calcium hydroxide. However, 0.2% Chitosan performs best for the removal of the calcium hydroxide associated with propylene glycol. And calcium hydroxide mixed with silicone oil results in the most difficult and unstable medication to remove.