Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania
Marioara Moldovan
Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania
Stanca Cuc
Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania
Codruţa Sarosi
Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania
Ioan Petean
Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany János Str., 400028 Cluj-Napoca, Romania
Miuța Filip
Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania
Rahela Carpa
Department of Molecular Biology and Biotechnology, Faculty of Biology and Geology, Babes Bolyai University, 1 M. Kogalniceanu Street, 400084 Cluj-Napoca, Romania
Rami Doukeh
Department of Well Drilling, Extraction and Transport of Hydrocarbons, Faculty of Petroleum Refining and Petrochemistry, Petroleum-Gas University of Ploiesti, 39 Bucharest Blvd, 100680 Ploiesti, Romania
Ioana-Codruta Mirica
Department of Oral Health, Iuliu Hatieganu University of Medicine and Pharmacy, 15 Victor Babeș Str., 400347 Cluj-Napoca, Romania
The aim of this study was to obtain three experimental resin-based cements containing GO and HA-Ag for posterior restorations. The samples (S0, S1, and S2) shared the same polymer matrix (BisGMA, TEGDMA) and powder mixture (bioglass (La2O3 and Sr-Zr), quartz, GO, and HA-Ag), with different percentages of graphene oxide (0%, 0.1%, 0.2% GO) and silver-doped hydroxyapatite (10%, 9.9%, 9.8% HA-Ag). The physical–chemical properties (water absorption, degree of conversion), mechanical properties (DTS, CS, FS), structural properties (SEM, AFM), and antibacterial properties (Staphylococcus aureus, Enterococcus faecalis, Streptococcus mutans, Porphyromonas gingivalis, and Escherichia coli) were investigated. The results showed that the mechanical properties, except for the diametral tensile test, increased with the rise in the %GO. After 28 days, water absorption increased with the rise in the %GO. The surface structure of the samples did not show major changes after water absorption for 28 days. The antibacterial effects varied depending on the samples and bacterial strains tested. After increasing the %GO and decreasing the %HA-Ag, we observed a more pronounced antibacterial effect. The presence of GO, even in very small percentages, improved the properties of the tested experimental cements.
