%0 Journal Article %T Atypical situations in root canals anatomy of human mandibular premolars %A Fabr¨ªcio SCAINI %A Fabio Leal BRAGA %A Irdival Cristino FIGUEIREDO J¨²NIOR %A Rafael Brand£¿o FERREIRA %J RSBO %D 2005 %I University of Joinville %X The knowledge of the teeth internal anatomy that will receive endodontic treatment is very important for the success of the treatment and prognosis of those teeth. In this study, the morphological variations that may occur in relation to the number of root canals present in the premolar mandibular teeth group were discussed, as well as the most efficient methods to diagnose the existence of these variations, in order to have a clearer diagnosis of the number of root canals to be treated.A case of an endodontic treatment of a mandibular premolar with 4 root canals was reported and some cases of endodontic treatment in mandibular premolars with 1, 2 and 3 root canals were shown. %K mandibular premolars %K internal anatomy %K root canal %U http://univille.edu.br/community/depto_odontologia/VirtualDisk.html?action=downloadFile&file=condicoes_atipicas_anatomia_canais.pdf¤t=%2FODONTOLOGIA%2FRSBO%2FRSBO_v.2_n.1_maio_2005