Abstract. The prospects and relevance of the optical spectroscopy method for study of modern stomatological restoration material are shown. A brief description of test sample is given. Technical characteristics of the automated spectral device UV-1280 are listed. Spectral dependences of optical transmittance of Omnichroma Blocker composite material are obtained. Transmission spectra are measured for ten samples with a thickness of 0.3; 0.5; 0.9 and more than 1 mm. It was determined that a layer thickness of 0.3–0.5 mm of this composite is sufficient to mask discolorations and make restorations opaque when restoring through cavities in the anterior teeth. It is shown that for a sample layer thickness of 0.3 mm, the transmission coefficient in the visible wavelength range does not exceed 10 %.

Keywords: spectroscopy, transmittance, therapeutic dentistry, restoration, composite material, blocker, inorganic filler

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