OBJECTIVE: An in vitro study was conducted to determine the efficacy of 17% EDTA plus 1.25% sodium lauryl ether sulfate (EDTA-T), 10% citric acid, and 17% EDTA with respect to Ca(++) extraction. STUDY DESIGN: The root canals of 90 extracted human canines were instrumented by using the step-back technique. The teeth were randomly divided into 9 groups of 10 teeth each according to the solution and time intervals involved (ie, 3, 10, and 15 minutes). The Ca(++) concentration of the solution was determined by using atomic absorption spectroscopy. RESULTS: At 3 minutes, there was no significant difference between Ca(++) extraction by 10% citric acid and 17% EDTA (P >.05). EDTA-T had the least efficacy for Ca(++) extraction (P <.05). At 10 minutes and 15 minutes, there were no significant differences between 10% citric acid and 17% EDTA or between EDTA-T and 17% EDTA (P >.05). However, 10% citric acid was significantly better than EDTA-T in terms of Ca(++) extraction (P <.05). CONCLUSION: Both 10% citric acid and 17% EDTA are good decalcifying agents when the step-back technique is used.
OBJECTIVE: An in vitro study was conducted to determine the efficacy of 17% EDTA plus 1.25% sodium lauryl ether sulfate (EDTA-T), 10% citric acid, and 17% EDTA with respect to Ca(++) extraction. STUDY DESIGN: The root canals of 90 extracted humancanines were instrumented by using the step-back technique. The teeth were randomly divided into 9 groups of 10 teeth each according to the solution and time intervals involved (ie, 3, 10, and 15 minutes). The Ca(++) concentration of the solution was determined by using atomic absorption spectroscopy. RESULTS: At 3 minutes, there was no significant difference between Ca(++) extraction by 10% citric acid and 17% EDTA (P >.05). EDTA-T had the least efficacy for Ca(++) extraction (P <.05). At 10 minutes and 15 minutes, there were no significant differences between 10% citric acid and 17% EDTA or between EDTA-T and 17% EDTA (P >.05). However, 10% citric acid was significantly better than EDTA-T in terms of Ca(++) extraction (P <.05). CONCLUSION: Both 10% citric acid and 17% EDTA are good decalcifying agents when the step-back technique is used.
Authors: Miriam Zaccaro Scelza; Fernando de Noronha; Licinio Esmeraldo da Silva; Marcos Maurício; Marco Antonio Gallito; Pantaleo Scelza Journal: Iran Endod J Date: 2016-05-01
Authors: Ângelo José da Silva Beraldo; Rogério Vieira Silva; Alberto Nogueira da Gama Antunes; Frank Ferreira Silveira; Eduardo Nunes Journal: Iran Endod J Date: 2017
Authors: Juan Gonzalo Olivieri; Marc García Font; Eva Stöber; Joan de Ribot; Montse Mercadé; Fernando Duran-Sindreu Journal: J Dent Sci Date: 2016-05-13 Impact factor: 2.080