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Sialography of the submaxillary gland in the diagnosis of radiolucent areas in the mandible.

A radiolucent area in the mandible can sometimes be found on routine radiographic examination. There are various reasons for such areas. Stafne (14) described 35 such lesions in the mandible in 1942 and collected 113 until 1958. The defect is characterised by its location at the lower border of the mandible below the second and third molar. The radiolucent area is round or oval, measuring 1 to 3 cm in diameter. It is always located below the mandibular canal, which may be displaced upwards. Most often the lesion is below the molars and only rarely in the region of the first premolar or canine. Its borders are very similar to the ones of an epithelium lined cyst: distinct and opaque. Clinical signs are missing and the size of the lesion does not change.