[Dentigerous cysts: apropos of 40 cases].

The study of 40 cases of voluminous odontogenic cysts has made evident the general characteristics of these current odontogenic tumors always tied-in with a tooth without any pathognomonic sign. The diagnosis is made by reasoning, combining clinical information, age, localisation, development, x-ray's information and anatomo-pathological parameters. The treatment is surgical enucleation of the cyst and it's generally easy.