INTRODUCTION: The epidemiological survey of the maxillofacial pathologies is of fundamental importance to prevention and treatment of these lesions. OBJECTIVE: The aim of the present study was to collect and analyze histopathological reports of biopsies sent to the Pathology Department, School of Dentistry from EBMSP. METHODS: A retrospective study of biopsies realized from 2001 to 2019 was conducted and the diagnoses of oral neoplasms and epithelial dysplasias were collected and analyzed. Data

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... related to sex and age of the patients, location of the lesions, and clinical and histopathological diagnosis were recovered. RESULTS: From the total of 3.068 biopsies received in this period, the oral neoplasms corresponded to 7,31% of this total. Patients of the female sex (55,3%) and individuals between 25 and 64 years of age (60,3%) were most affected by neoplasms. The most common diagnosis among benign neoplasms was the ameloblastoma (20,3%) and the squamous cells carcinoma (67,2%) was the most frequent diagnosis in the group of malignant neoplasms. The anatomical location most affected by the neoplasms was the jaw (36,7%). The epithelial dysplasias corresponded to 3,8% of the sample, with a higher occurrence in the male sex (50,8%) and the age group between 25 and 64 years (61%); the anatomical location most affected was the palate (22,8%), and the mild epithelial dysplasia (68,6%) was the most common diagnosis. CONCLUSION: The present study highlights the importance of the epidemiological surveys to prevention and treatment of the maxillofacial lesions and emphasizes the necessity of the appropriate filling out of biopsies files.