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According to the data of targeted examinations of workers with hazardous working conditions, in particular, in the presence of a radiation factor, the dental status in terms of the prevalence and intensity of major dental diseases does not differ significantly from those working in normal working conditions. At the same time, during interviews and clinical examination, workers in hazardous industries often reveal hypertonicity of the muscles of the maxillofacial region, which is especially noticeable in people with long work experience. One of the reasons for the hypertonicity of the muscles of the maxillofacial region can be chronic stressful loads associated with hazardous working conditions. However, this section of functional dentistry has not been sufficiently studied in relation to workers in hazardous industries. It is required to compare the results of electromyography of the muscles of the maxillofacial region and the data of psychological examination of workers. The aim of the study is to compare the psychological characteristics and the results of electromyography of the muscles of the maxillofacial region in workers with hazardous working conditions and normal working conditions in the 45-55 age group. Material and Methods: A comparative analysis of electromyography data of masticatory and temporal muscles, "Hamburg testing" of the masticatory apparatus and psychological characteristics was carried out in 50 workers of hazardous industries (radiation production factor) and in 53 workers in normal working conditions. Results of the study: the study revealed differences in the results of psychophysiological examination, "Hamburg testing" of the chewing apparatus and electromyography of the muscles of the maxillofacial region in workers with hazardous working conditions and working in normal conditions. Employees of hazardous industries, according to psychological examination, are subject to chronic stress, which leads to a distortion of the tone of the muscles of the maxillofacial region, which, in turn, causes more frequent detection of dysfunction of the masticatory apparatus in workers. Conclusion: the results of the study should be taken into account in the complex dental rehabilitation of workers in hazardous industries, including measures aimed at normalizing the muscle tone of the maxillofacial region.

The level of oral hygiene among many patients with implants is insufficient. In the absence of clinical examination and occupational hygiene, there is an averagely frequent development of inflammation in peri-implant tissuesperi-implantitis, which can cause implant disintegration. It is necessary to control hygiene indicators at the different stages of implantation. Objective: to analyze changes in hygiene and periodontal parameters during implant treatment. Materials and methods: At the stages before implantation, during osseointegration and the year after prosthetics on implants, the hygiene indicators and periodontal and microbiota status of 60 patients with dental implants were analyzed. Control methods used include Oral Hygiene Index Green J.C., Vermillion J.R. (OHI-S); gingivitis index Loe H., Silness J. (GI); Muhllemann index modified by Cowell; and PMA index modified by Parma. The level of halitosis was determined using the organoleptic index and the Halimeter instrument. Molecular genetic diagnosis of periodontopathogenic bacteria in the periodontal and peri-implant space was carried out. Results: Hygiene and periodontics after preimplantation tooth restoration, and periodontal deterioration by the time the implants open, then before replacing the temporary prostheses with permanent ones and after three months of functioning of the prostheses on the implants, which necessitates professional oral hygiene before these stages. Conclusion. Occupational hygiene every three months provides a stable adequate level of hygienic and periodontal indicators for users of prostheses on implants, and also reduces the detection of peri-implantitis.

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BACKGROUND: The practice of prosthetics on implants shows a fairly high percentage of removed implants over the specified period. The reasons can be both insufficient hygiene of the tissues around the implants and their overload. Regardless of the cause, bone resorption occurs from the apex of the alveolar ridge (part) of the jaw deep into contact with the implant in combination with chronic inflammation of the periimplant soft tissues. Removal of the implant in such cases is indicated for bone resorption at half the length of the implant. Microstructural analysis of the surface of implants is rarely reflected in publications, since high-resolution microscopy is only possible for removed implants. AIM: Microscopy and spectrometry of the surface of implants removed for periimplantitis. MATERIALS AND METHODS: The surface analysis of the five implants removed due to periimplantitis was carried out by scanning electron microscopy in high vacuum mode with electron probe microprobe analysis of the elemental composition. A FEI Teneo VolumeScope single-beam scanning electron microscope with a detector was used to perform XFlash 6/30 energy dispersive analysis. The research was carried out in the Skolkovo Technopark. RESULTS: The performed microscopic and spectrometric analysis, accompanied by micrographs and spectrograms of the cervical part of the implant in the area of bone tissue conservation, the presence of connective tissue and in the area of the exposed surface of the implant, demonstrate the process of disintegration of the implant due to periimplantitis, which consists in demineralization and resorption of bone tissue (in places up to the surface of the implant, in places with through defects to the surface of the implant) and its replacement with connective tissue. CONCLUSIONS: Disintegration of the implant due to periimplantitis is accompanied by the process of demineralization and resorption of bone tissue (in places up to the surface of the implant, in places with through defects to the surface of the implant) and its replacement with connective tissue.