Options for processing enamel before manufacturing an adhesive splinting structure

Relevance. The durability of a splint depends on a number of factors: the level of oral hygiene, the degree of tooth mobility, the presence of occlusal trauma, and the strength of adhesion of the splint-dental interface. In turn, the issues of adhesion are inextricably linked to the anatomical features of the structure of hard tissue, particularly enamel. The correct execution of the cleaning, removal of the aprismatic layer and acid etching steps in the fabrication of an extracoronal splint determines the quality of adhesion at the tire-tooth interface.The aim of the study is to study the enamel surface structure in preparation for extracoronal splinting of teeth.Material and research methods. The 40 teeth were divided into 4 groups depending on the chosen method of preparation for fixation of the reinforcement structure in the extracoronal splint: brushing with paste, treatment with air-abrasive and ultrasonic methods, preparation with a fine-dispersed diamond boron.Results of the study. The preparation of enamel surface with fine diamond boron with particle size of 20 µm and acid etching with 37 % orthophosphoric acid determined a uniform character of microstructure, in the full volume the etched areas of enamel prisms amounted to 98.55±0.51 % of the total surface area of the treated enamel.Conclusion. The preparation of the enamel surface with a fine diamond boron removes the aprismatic layer, ensuring the longevity of the fabricated splint by creating a high-quality "hybrid" layer at the splint-dental interface.