no requirement

Cysts are common and the majority are inflammatory. Almost all true cysts and most benign neoplasms expand by hydrostatic pressure and are therefore frequently spherical or nearly spherical in shape. This shape is achieved in larger cysts and neoplasms by displacing the buccal and lingual cortices and presenting as buccolingual expansion. Odontogenic or non odontogenic lesions, arising within the jaws, if sufficiently large will displace the mandibular canal, create resorption of the adjacent teeth and expand the cortices. It is essential for a dental professional to be familiar with the radiological appearance of the most common well defined unilocular radiolucencies of the jaws and the importance of early detection and management of such lesions.