[Oral leukoplakia. A clinicopathologic study of 190 cases].

In this study an attempt was made to correlate the causative factors of leukoplakia. Histologic criteria helped for the classification of our cases in three groups according to widely accepted standards. As final result it is that smoking and excess use of alcoholic drinks could be involved as causative agents. The clinical appearance of the leukoplakia lesions with their histological type is also correlated.