 The objective of this study was to investigate the structural arrangement of a commercially available dental paste, cupral, when mixed with a hydrosol of copper nanoparticles and copper, two, oxide. The resulting mixture was found to form a complex nanosized composite structure, where nanoparticles from the hydrosol penetrated the surface layers of the CCH particles. This discovery could potentially lead to the development of a new technology for nano impregnating the tooth root dentin during endodontic and periodontal treatments without requiring additional electrophoresis. This article was authored by V.A. Rumiancev, G.A. Frolov, A.V. Blanova, and others.