Abstract
The results of a comparative analysis of dental glass ionomer cements are compared: "AHfil +" (AHL, United Kingdom), "Ketac Molar Easymix" (3M ESPE, USA), "Fuji IX GP" (GC, Japan), "ProGlass Nine" (Silmet , Israel), "Polyacrylin" (TechnoDent, Russia), "Cemion" (VladMiVa, Russia), "Kemfil" (StomaDent, Russia) and "Glassin Rest" (Omega-Dent, Russia) in terms of working time, hardening time, strength compression, radiopacity, microstructure and chemical composition. It is shown that the main component of the powders of these GICs is crushed calcium ("Kemfil"), strontium ("AHfil +", "Cemion" and "Fuji IX GP"), calcium-strontium ("ProGlass Nine", "Polyacrylin" and "Glassin Rest") and lanthanum-calcium aluminofluorosilicate glass ("Ketac Molar Easymix"). All of them contain phosphorus. Differences in powder granulometric composition indicate a difference in the technology of glass grinding during their production. The working time of the studied GICs is from 1 to 3.5 minutes. The requirements of GOST 31578-2012 and ISO 9917-1:2007 do not correspond to "ProGlass Nine" (36 ± 3 MPa), "Kemfil" (68±6 MPa) and "Glassin Rest" in terms of strength, and "ProGlass Nine" in hardening time. "Fuji IX GP" has the highest strength (201 ± 33 MPa), the rest of the GIC - 142-169 MPa. All studied GICs, with the exception of the non-radiopacity "ProGlass Nine", have a radiopacity corresponding to 1 mm of aluminum. According to the results of the tests, "AHfil +", "Ketac Molar Easymix", "Fuji IX GP", "Polyacrylin" and "Cemion" are recommended for clinical use by dentists
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