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In modern dentistry etiology of pathogenesis of periodontal diseases is given great importance, as the knowledge of the mechanisms of these pathologies in many respects facilitated the treatment and prevention of data breaches. The low efficacy of periodontal pathology treatment is caused by lack of knowledge about the mechanisms of their development. Despite numerous studies of the problem many aspects of these disorders pathogenesis are staying unsolved. The poor hygiene of the oral cavity, dental defect and anomaly bite aren´t the only reasons that cause the occurrence of diseases of tissues of periodontium. The problem is still far from the final solution because of numerous etiologic factors and indistinctness of pathologic mechanisms of the periodontal disorders development. It remains unclear how different in their origin local and general factors result in the same narrowly localized periodontal disturbances. At the same time a lot of research works are devoted to this issue. Many authors think the primary cause to be the bacterial factor; other researchers consider oral microbe colonization is of the secondary importance. With the development of functional research reveal microcirculatory disturbances in the blood vessels of periodontal disease, which can be considered as the starting mechanism of the development of pathology. This scientific review presents the analysis of different investigations in the field of periodontal disorders etiological pathogenesis where vascular changes and micro-oxidant protection system disorders are of the primarily importance.

This article was the urgency of the considered subjects, ergonomic value for a person in the course of its work. Ergonomically considered unsatisfactory processes for maintenance and repair of motor vehicles. Also it provides a methodology for the implementation of ergonomic analysis in order to create a safe working environment in the service station.