[Classification of benign tumors and cysts of the jaws].

On the basis of 324 cases of maxillary tumours, the authors review the classification of these neoplasms. The most frequent tumours are benign epithelial odontogenic tumours, which represent 55% of all tumours. The most common of these tumours is the ameloblastoma, followed by the odontomas. Most of the tumours of non-dental origin are benign (72% of this group). Amongst the malignant tumours, osteosarcomas are much more common than chondrosarcomas. The authors also discuss the various types of cyst and their respective relative frequency.