Variabilidade das àreas transversais do canal e da raiz de pré-molares superiores com três raízes através da microtomografia computadorizada e da tomografia de feixe cônico

• Autor(a) principal: Marca, Caroline
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional PUCRS
• Texto Completo: http://hdl.handle.net/10923/412
• topic: ODONTOLOGIA; ENDODONTIA; TOMOGRAFIA COMPUTADORIZADA; CANAL RADICULAR

Introduction: This study analyzed variations in canal and root cross-sectional area in three-rooted maxillary premolars between high-resolution computed tomography (μCT) and cone beam computed tomography (CBCT).Methods: Sixteen extracted maxillary premolars with three distinct roots and fully formed apices were scanned using μCT and CBCT. Photoshop CS software was used to measure root and canal cross-sectional areas at the most cervical and the most apical points of each root third in images obtained using the two tomographic computed (CT) techniques, and at 30 root sections equidistant from both root ends using μCT images. Canal and root areas were compared between each method using the Student t test for paired samples and 95% confidence intervals. Results: Images using μCT were sharper than those obtained using CBCT. There were statistically significant differences in mean area measurements of roots and canals between the μCT and CBCT techniques (p<0. 05) Root and canal areas had similar variations in cross-sectional μCT images and became proportionally smaller in a cervical to apical direction as the cementodentinal junction was approached, from where the area then increased apically. Conclusion: Although variation was similar in the roots and canals under study, CBCT produced poorer image details than μCT.