The radiation has an antitumor effect and causes radiation reactions and damage to surrounding tissues within the framework of combined antitumor treatment of patients with cancer of maxillofacial region. It also has an irreversible effect on the production of saliva by large and small salivary glands, and this must be taken into account when planning radiation therapy for this group of patients.

Introduction. The theme of a healthy lifestyle remains relevant at the present time. The function of the dentofacial system is an integral and important component of human health in general, is responsible for speech formation, respiration and nutrition. The goal of orthodontic treatment is to preserve the health of ones own teeth, to establish the correct function of the masticatory apparatus, to create a smile aesthetics, to exclude or facilitate other dental procedures without resorting to more invasive methods of treatment. Orthodontic treatment directly affects the quality of human life, so it is important to understand the need for its timely implementation. A large number of people seek orthodontic care in connection with raising awareness among the population and its availability.Results. The fast pace of development of dentistry and modern technologies allow us to correct both congenital and acquired defects of the dentition. For the adult population, one of the main means of orthodontic treatment is a fixed orthodontic technique, in the form of a bracket system. The average duration of treatment with this method is 1.5-2 years. But already in the first month, the orthodontist dentist observes the presence of plaque in his patients, which occurs due to insufficient oral hygiene.Conclusion. Studies have shown that a low level of hygiene entails the growth of carious and periodontopathogenic microflora, as a result of which irreversible changes occur on the surface of the teeth, leading to enamel demineralization and hypersensitivity, the occurrence of gingivitis and periodontitis. These changes, or the risk of their occurrence, force the dentist to prematurely remove orthodontic equipment without achieving the desired result. An analysis of the causes of this problem and the coverage of research results indicate the need to improve the methodology of individual oral hygiene in order to avoid the side effects of orthodontic treatment.

Head and neck cancer is the sixth most common cancer worldwide. It is a complex problem due to the high incidence, which is increasing. Disturbances in the oropharyngeal region lead to persistent morphological and functional disorders, affect food intake, speech, breathing, hearing, vision, facial expressions and the appearance of patients. However effective treatment is available only in the early stages of the disease. Treatment of locallY., relapsing and disseminated tumors unsatisfactory despite the interdisciplinary approach. Invalidation of patients causes irreparable psychological damage to person and leads to rejection of the necessary surgical treatment. In this connection the choice of treatment is based on the maximum preservation of the form and function of the organ, localization and spread of the process, pathomorphological examination, the age of patients, and concurrent general diseases. However the combined method of treatment is the most effective regardless the morphological variant of malignant tumor of oropharyngeal region.