Efficacy of removing calcium hydroxide deposits from endodontic instruments prior to sterilization using different cleaning methods

Introduction. Endodontic instruments during root canal treatment come into contact with dentinal debris, irrigation solutions and medication agents, which reminants should be eliminated before sterilization. The aim of the study was to verify effectiveness different cleaning methods for removing calcium hydroxide paste residues from surfaces working parts hand instruments, as well propose an effective protocol endodontic Material methods. Forty-two new were used remove filled canals extracted teeth. After contamination medication, they divided four groups subjected individual decontamination - mechanical, chemical ultrasonic, a combined protocol. then observed under light microscope. evaluated based on amount residual matter surface instruments. Results. showed statistically significant difference in achieved level cleanliness compared mechanical (?2 = 12.00 p < 0.05) 0.05), but there no ultrasonic disinfectant solution 2.4 > 0.05). By applying protocol, completely clean found, lowest values at entire group (8.33%). Conclusion. that consisted sponge soaked chlorhexidine gluconate, soaking sodium hypochlorite, best efficiency residues.