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High-temperature x-ray diffractometry was used to establish the presence of a reversible polymorphic transformation both of synthesized leucite with stoichiometric composition and of leucite precipitated as a result of the crystallization of glass. The temperature limit determined for this transition for leucite in a crystal-glass material shifts to lower temperatures as compared with a modification transition of synthetic leucite.

The characteristics of dental materials of diverse nature are briefly described and their advantages and disadvantages are analyzed. A promising direction in dental materials science is development of silicate materials, which have gained increasingly wider popularity and recognition in the last few years. Such materials are used to fabricate dental prostheses from monolithic blanks and by layer-wise deposition of their fine powders on metallic substrates.

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Composite stomatological light-cured materials with a polymer matrix, bonding layer and inorganic filling (glass) are examined. The requirements imposed on these materials by modern therapeutical stomatology are indicated. The composition and some technological aspects of the production of the new material are presented. An investigation of the physical-mechanical properties of the new composite material (strength, water absorption, polymerization depth) showed that these indices are on par with the best foreign analogs.