One of the key modern orthopaedic dentistry problems related to rehabilitation of patients with complete edentulism is the process of their adaptation to artificial orthopaedic constructions. According to fundamental and modern scientific research, the biological factor, i.e. the complex of all reactions of the organism to the prosthesis including psychological reactions that is individual for each user, is the most important one. Development of new conditioned-reflex connections and formation of cortical inhibition of active stimulus, that a full removable denture is, depends directly on the balance and dynamics of patient’s neural processes despite having several common characteristics including chronometric ones that can be revealed in the majority of patients of this category. Furthermore, previous experience of full removable denture usage is of great importance, specifically its presence or absence and whether it was positive or negative etc., which in its entirety influences the degree and intensity of phases in patient’s adaptation to a new artificial construction. In this connection, it is important to note the role of patients’ psychological preparation, their familiarisation with corresponding illustrative material, establishment of the psychological contact aimed to form positive but at the same time realistic view on the provided prosthetic care in terms of functional and aesthetic optimum restoration, which is an essential part of successful rehabilitation for this category of patients. On the grounds of many years’ practical experience, a number of most frequent complaints and questions of patients provided with rehabilitation using full removable dentures which frequently accompany adaptation process and demand careful doctor’s attention while performing explanatory work has been developed. Thereafter, it is necessary to make a corresponding note in patient’s medical record with signature confirmation in order to prevent further conflicts associated with the process of adaptation to dentures and its peculiarities related to this specific patient.

Based on literature data, this article reviews a range of problems associated with hygienic care after obturation prostheses and the oral cavity after combined treatment of malignant neoplasms. At the present time, replacing prosthetic care after maxillary resection due to malignant neoplasms using obturator prostheses is the main method for rehabilitation of oncological patients. Such methods as dental prosthetic care based on dental implants and removable dentures for elimination of partial and complete edentulism is impossible in such conditions. A defect in the maxilla, an oronasal fistula, post-operative and post-radiation jaw contracture as well as hyposalivation, impair the hygiene of the oral cavity. Acrylic plastics used for production of obturator prostheses have such substantial flaws leading to development of inflammation and progression of atrophy in the supporting tissues of the basal seat. This reduces short-term and long-term efficacy of orthopaedic dental rehabilitation procedures after replacing dental prosthetics. A conclusion has been drawn on the necessity of development and practical introduction of a special complex of dental hygienic procedures — professional and individual — adapted for oncological patients that would be implemented within the framework of dynamic dispensary observation in the setting of a dental polyclinic.

BACKGROUND: The relevance of this study is that in many countries around the world, and in Russia in particular, the increasing trend toward an aging of population makes problems in dentistry urgent, among which the significant increase in the use of removable dentures is important. The probability of the complete or partial loss of their own teeth is increasing, therefore, the number of removable dentures and the problem of stabilization, adaptation and fixation arises. Factors such as the stabilization and fixation of removable dentures depend on certain anatomical conditions of the denture bed, but due to the lack of optimal conditions, especially in patients with a complete lack of teeth, the latter have to resort to additional means (adhesives) that are used to improve the fixation of removable dentures. AIM: The purpose of this study was to evaluate the adhesive properties of the preparation for fixation during prosthetics with removable structures, depending on the area of the base adjacent to the prosthetic bed. MATERIAL AND METHODS: Was used a device consisted of a laboratory tripod, a coil, a metal cylinder and a plastic disc are presented in the aricle. However, the bottom of a cylinder is lined with bioskin that simulates oral mucosa tissues. A dynamometer with an option to measure maximum results was used to measure the adhesion force. The adhesive properties of adhesive cream, containing carboxymethyl cellulose and Poly (methyl vinyl ether-alt-maleic acid) were evaluated in 3 stages. Adhesion was examined on a dry surface, on a surface moistened with distilled water, and on a surface moistened with artificial saliva. First, the adhesion value was determined immediately after application of the fixation cream and then after 2 minutes of exposure to the adhesive cream. RESULTS: It was found that the contact area of the denture base and oral mucosa equal 55,6%, is the limit percentage of the nonconformity, that can be compensated by using Corega adhesive cream (GSK, UK) only with sufficient moisture content of the oral mucosa and a two-minute exposure of the denture adhesive. CONCLUSIONS: The adhesion strength of the means for fixing removable prostheses increases after wetting the studied surfaces. It is established that the symmetry of non-congruent sections on the basis of the prosthesis can increase the adhesive stability of the entire removable structure.