Comparison of remaining obturating material on canal walls using rotary and hand instrumentation techniques for endodontic re-treatment Dr. J. Ghoddusi*- Dr. P. Ghaziani*- Dr. Sh. Nazari** *Associate Professor of Endodontics Dept., Faculty of Dentistry, Mashhad University of Medical Sciences. **Assistant Professor of Endodontics Dept., Faculty of Dentistry, Hamedan University of Medical Science...
