Estudo do sistema de canais radiculares em dentes com hipercementose

Abstract

The hypercementosis is an excessive deposition of cementum on the normal layer, promoting the thickening of the root, maintaining intacts the periodontal ligament space and hard plate. It is known that the inability to locate and promote the complete removal of organic debris and bacteria from the canal system is the major cause of failure in endodontic treatment. Therefore, this research contributes to increase the knowledge regarding the canal system in teeth with hypercementosis.The aim of this research is to describe the canal system in teeth with hypercementosis through clearing and scanning electron microscopy (SEM) techniques, where we observed some of the anatomical characteristics of the canal system and the presence of accessory foramina. Among the findings, the most affected group by hypercementosis was mandibular premolars. The secondary canals were found in 60% of maxillary first molars, 88.8% of maxillary second molars, 62.5% of mandibular first premolars, 75% of mandibular canines and 71.4% of mandibular incisors. The apical deltas were seen in 50% of mandibular first premolars. In the samples studied in the SEM many accessory foramina were observed. It is suggested that the hypercementosis results in considerable increase in the number of secondary canals in all studied tooth groups, increases the frequency of apical deltas in mandibular canines and mandibular premolars and increase the number of accessory foramina in all tooth groups studied.