Simple bone cyst, also called traumatic bone cyst, haemorrhagic bone cyst, solitary bone cyst, or idiopathic bone cavity, is a benign intrabony cavitation that most commonly occurs in the body of the mandible in patients between 10 and 20 years of age. No true epithelial lining exists, so idiopathic bone cavity (IBC) is the more appropriate term. Ibcs are usually incidental radiographic findings. IBC’s can be large, multilocular, and exhibit impressive expansion but do not demonstrate radiographic features of local anatomic destruction such as displacement of teeth, resorption of tooth roots, creation of periodontal pathology, cortical bony erosion, or displacement of the inferior alveolar nerve.