@misc{misc496840cf,
title   = {Apical preparation for retrofill with ultrasonic},
author = {Betti, Luciana Viti and Bramante, Clóvis Monteiro and Bramante, Alexandre Silva and Bernardineli, Norberti},
year = {1999},
booktitle   = {Annual Meeting of the Brazilian Society for Dental Research - Brazilian Division of the IADR}
}