Abstract
Stafne's bone defect (SBD) or Stafne's bone cavity (SBC) is an uncommon bony defect occurred especially only at the lingual cortex of mandible. Clinically, patients with SBD are usually asymptomatic. In most cases, the defect is observed accidentally via X-ray panorama during other dental treatments. Here we presented a female with SBD and we reviewed relevant literatures on SBD, summarized the clinical characteristic and radiographic features with our experiences.