Study of Nanophotocomposite Material Microhardness Under Various Hardening Conditions

Microhardness of fiberglass – reinforced photocomposite material under different conditions of light polimerization

“…Samples of fiberglass-reinforced photocomposite for the study of microhardness were made using a special detachable mold [8]. The test material was filled into the specified form, then in different modes, according to the division into groups, it was irradiated with a light flux of LED photopolymerizer, placing the LED at a minimum distance from the surface of the samples, then grinding and polishing to shine.…”

“…At the same time, there is no information regarding the mode of light exposure (constant high intensity or "soft start" with a gradual or sharp increase in intensity). However, it is well known that the specific light energy significantly affects the achievement of any photocomposite material a certain level of hardening, moreover, hardening continues for some time after light exposure, stretching for several days [8]. During this time, the physical and mechanical characteristics of the photocomposite improve, in particular, the microhardness, the indicators of which can give an idea of the degree of polymerization of the material.…”