Al-Rammahi H, Al-Huwaizi H. Evaluation of the Efficiency of Three Different Obturation Techniques to Obturate the Isthmus Area of Roots Canals Prepared by Two Different Instrumentation Techniques (An In Vitro Study). J Bagh Coll Dent [Internet]. 1 [cited 20Nov.2019];28(2):14-8. Available from: http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1138