Resumo (EN)
The radiology is an essential tool to oral diagnosis and has presented technological evolutions that collaborate to planning and treatment in Dentistry. The volumetric cone beam computed tomography (CBCT) presents advantages related to low radiation dose e high definition to maxillary lesions. The Stafne's cyst or lingual bone defect of mandible is more frequent at the posterior region, below the mandibular canal, and may be visualized by the CBCT. Report of cases: two clinical radiographic cases from patients with diagnosis of lingual bone defect of mandible are analyzed. Case 1 - leucoderm, male, 52 years old, presenting solitary image close to the left second lower molar with depression of lingual cortical bone. Case 2 - xantoderm, male, 60 years old, solitary images, located to mandibular ramus. The authors concluded the CBCT has relevant importance to diagnosis of lingual bone defect of mandible that allows visualization of the relationship between the defect with the lingual bony cortical and its etiology. The CBCT increased the detailing, collaborating to planning, treatment and follow-up of cases.