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Background: The staff of the health area is constantly exposed to blood and / or fluids coming from patients during their workday. Therefore, dentistry personnel run the risk of contracting infectious diseases. Purpose: To know the frequency of occupational risk due to sharp objects in top-level dentists of the urban and rural Health Centers of the Health Services of Nuevo León. Methods: design of the non-experimental, descriptive, cross-sectional and prospective study. Study population: applicative dentists of the Health Services of Nuevo Leon with a probabilistic sampling 108 of dentists. A questionnaire designed with 12 questions related to sharps accidents with a reliability of a Cronbach's alpha of .832 was used. Results: 38.8% of the men reported having presented an accident at work and 67.2% of the women reported having suffered an accident with a sharp cut. In relation to knowing if they had suffered an infection due to an accident by sharp objects, 59.3% had suffered an accident and 40.7% had not suffered an accident; 49% were trained in biosecurity and 51% have not received training. Conclusion: Based on these results we can conclude that there is still a need to improve the training and expand the coverage of training to the dentist in matters of biosafety regulations and management of infectious biological dangerous wastes as well as to update the knowledge of puncture-borne infections. [ABSTRACT FROM AUTHOR]