TI - Comparative study of techniques for the removal of root canal gutta-percha PY - 1996 AU - Ferreira, C M AU - Orsi, I A AU - Froner, I C AU - Pela, C A T2 - General Session and Exhibition of the International Association for Dental Research J2 - Journal of Dental Research VL - 75 IS - 5 SP - 1112 ER -