Monteiro, M.R., Ferraz, C.C.R., Silva, E.J.N.L. and Almeida, J.F.A. 2013. Diagnosis of a horizontal root fracture during retreatment of a maxillary canine utilizing an electronic apex locator and monitoring with CBCT: a case report. Brazilian Dental Science. 16, 4 (Dec. 2013), 99–104. DOI:https://doi.org/10.14295/bds.2013.v16i4.923.