Deviant morphology of the root canal system in mandibular premolars: clinical cases.

Numerous cases of aberrant root and root canal morphology have been described, still diversion occurs more frequently in premolars and molars. To the dental researcher, the aberrations in the mandibular second premolars afford a vast field of interest. The current report presents a clinical case which demonstrates a simplified therapeutic protocol for re-treatment of Vertucci type V root canals. Endodontic access is gained by expanding the endodontic cavity. The instrumentation (preflaring and final preparation) of the root canal system is performed using predominantly hand files in order to preserve to the maximum the tactile feedback in the apical part of the ramification. Obturation is performed through hydraulic condensation. Postoperative radiographs show sufficient three-dimensional sealing of all portals of exit with excellent healing result.