Evaluation of different irrigation solutions and activation methods on removing calcium hydroxide

Abstract

Background/purpose Dual Rinse HEDP is a soft chelator which can be used simultaneously with sodium hypochlorite (NaOCl). The aim of this study is to evaluate the efficacy of Dual Rinse HEDP with different irrigation systems on removing calcium hydroxide [Ca(OH) 2 ]. Materials and methods Eighty maxillary central incisor teeth were shaped and a standard groove on the apical third of the root canal surface was prepared. The root canals were filled with Ca(OH) 2 . Samples were divided into two groups according to the solution and these two groups were divided into three subgroups based on the activation technique. In group 1 (n = 10) Ca(OH) 2 was removed using conventional irrigation with NaOCl whereas in group 2 (n = 10) conventional irrigation with NaOCl – Dual Rinse HEDP mixture was used. Group 3 (n = 15) and group 4 (n = 15) received sonic activation with the same irrigants as groups 1 and 2 respectively. In group 5 (n = 15) passive ultrasonic irrigation (PUI) was used with NaOCl while in group 6 (n = 15) the irrigant was the mixture. The amount of remaining Ca(OH) 2 in the artificial grooves were evaluated under a light microscope. Results None of the procedures managed to completely remove the Ca(OH) 2 from artificial grooves. There was no significant difference between the groups (p = 0.053). The scores were significantly lower in PUI group compared to the other techniques between NaOCl groups (p = 0.021). Conclusion Dual Rinse HEDP does not make a difference on elimination of Ca(OH) 2 . PUI is more efficient than both methods when NaOCl solution is used.

Removal of Calcium Hydroxide Intracanal Medicament With Four Different Techniques (A Cone Beam Computed Tomography in Vitro Study)

“…This outcome was supported by the findings of Silva et al (10), Kucukkaya et al (18) and Lins et al (19). On the contrary, PUI was reported to have no significant difference on calcium hydroxide removal by Dias-Junior et al (20) and Harzivartyan et al (21). The outcome of these two studies could be attributed to the lack of a final rinse with EDTA, or any other chelating agent in their irrigation protocol.…”

Efficacy of Phytic Acid as an Endodontic Chelator on Removing Calcium Hydroxide from Root Canals: An In Vitro Study

“…Kök kanal dolgu patının, kanal duvarlarına adezyonunu sağlamak ve sızdırmazlık kapasitesini artırmak için KH, kök kanallarından tamamen uzaklaştırılmadır. 22,23 Ancak KH'yi kök kanal sisteminden tamamen uzaklaştıran bir irrigasyon solüsyonu veya irrigasyon yöntemi rapor edilmemiştir. 20,23,24 Kök kanal tedavisinin ayrılmaz bir parçası olan şelasyon ajanlarının smear tabakasını kaldırmada etkili olması ve biyouyumlu olması beklenmektedir.…”

“…22,23 Ancak KH'yi kök kanal sisteminden tamamen uzaklaştıran bir irrigasyon solüsyonu veya irrigasyon yöntemi rapor edilmemiştir. 20,23,24 Kök kanal tedavisinin ayrılmaz bir parçası olan şelasyon ajanlarının smear tabakasını kaldırmada etkili olması ve biyouyumlu olması beklenmektedir. Nassar ve ark., IP6'nın kök kanallarında kullanımının, EDTA'ya kıyasla daha temiz kök kanalları ve geniş açık dentin tübülleri ile sonuçlandığını göstermiştir.…”

Efficacy of Various Laser-Assisted Irrigation Activation Techniques on Calcium Hydroxide Removal

“…This method had also been used in many studies. [36][37][38] However, pixel counting provides more sensitive evaluation compared to the scoring method.…”