2019-03-272019-02-22LOUREIRO, M. A. Z. Análise comparativa do volume de tecido dental removido no acesso endodôntico convencional e guiado em molares superiores. 2019. 34 f. Dissertação (Mestrado em Odontologia) - Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/tede/handle/tede/9393Objective: To compare the volume of dental tissue removed after guided and conventional endodontic access in maxillary molars. Material and Method: Twenty first and second upper human extracted molars were selected and submitted to cone beam computed tomography (CBCT). The teeth were divided into two groups: conventional endodontic access (G1) and guided endodontic access (G2). The DICOM files obtained by the CBCT examination were transferred to InVesalius® software to calculate the initial volume (IV) of each tooth. The teeth of the G2 were scanned with the 3SHAPE® device for the planning of the guides, and the same ones printed in Straumann® CARES® P30 3D printer. The accesses in the G1 group were realized with spherical diamond tips and Endo Z drill in high rotation, and in group G2 spherical diamond tips were used in high rotation and drills of 1,3mm in engine of implantology. New CBCT tests were performed after the endodontic accesses to calculate the final volume of each sample unit (FV). The volume of dental tissue removed (VR) was calculated by the formula: VR = IV-FV. Volumes between groups were compared by Student's T-test for independent samples. Results: There was a mean volume reduction of 62.526 mm³ (5.86%) in conventional access and 45.677 mm³ (4.11%) in guided access, with difference between groups (p = 0.004). Conclusion: Guided endodontic access in extracted human upper molars preserves a larger volume of dental tissue when compared to conventional endodontic access.application/pdfAcesso AbertoPreparo de canal radicularEndodontiaTomografia computadoriza de feixe cônicoRoot canal preparationEndodonticsCone beam computed tomographyCIENCIAS DA SAUDE::ODONTOLOGIADissertação