Abstract

BREDA, Polianna et al. In vitro analysis of the internal anatomy of lower premolars inserted in human mandibles through radiographs and Cone Beam computed tomography. RGO, Rev. gaúch. odontol. (Online) [online]. 2011, vol.59, n.3, pp. 405-409. ISSN 1981-8637.

Objectives The aim of this study was to analyze the root anatomy of lower pre-molars through X-ray and computed tomography scan (cone well). Methods The sample comprised ten premolars embedded in four human mandibles from the collection of the Anatomy section of the Federal University of Espírito Santo. The jaws were first photographed and the teeth were then submitted to radiographic examination via the periapical technique. The images were digitized, stored on computer files and analyzed by three examiners. The computed tomography-scanning of the specimens was made using the cone beam technique. Results The results showed that the mean ratings of the radiographic examination were 50%, 43% and 7% for one, two and three root canals, respectively. The computed tomography scan detected one single root canal (type I) in 40% of teeth assessed and V-type root canals in 60% of the teeth. In other words, root canals starting out as one at the level of the pulp chamber split before reaching the apex. Conclusion The conclusion is that the three-dimensional image provided by the the cone beam technique represents a major advance as a method of establishing endodontic diagnosis.

Keywords : Anatomy.; Endodontics.; Radiography dental.; Tomography; X-Ray computed..