Protective effect of experimental bioactive composites on enamel – a pilot study (CROSBI ID 706614)
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Podaci o odgovornosti
Španović, Nika ; Par, Matej ; Attin, Thomas ; Tarle, Zrinka ; Tauböck, Tobias T.
hrvatski
Protective effect of experimental bioactive composites on enamel – a pilot study
Aim: Bioactive glasses (BGs) can be used to render resin composites anti-cariogenic. This pilot study aimed to investigate the protective effect of experimental BG-composites on enamel immersed in a repeatedly replenished acidic solution. Materials and methods: Three experimental composites based on a photo-curable resin (60:40 wt% bisphenol-A- glycidyldimethacrylate and triethylene glycol dimethacrylate) and a total filler ratio of 70 wt% were prepared by replacing 0, 10, and 20 wt% of silanized reinforcing fillers (barium glass and silica) with unsilanized BG 45S5. Enamel blocks (3x3x1 mm, n=9) were prepared from intact human third molars. Light-cured composite specimens (diameter=7 mm, thickness=2 mm, n=3 per material) were immersed with enamel blocks in a lactic acid solution (5 mL, pH=4.0). The immersion medium was replenished every four days. Knoop microhardness (MH ; load=100 g, dwell time=20 s ; n=5 per measurement) and pH of the immersion medium were assessed at the following time points (days): 0, 4, 8, 12, 16, and 20. Statistical analysis was performed using a nonparametric one-way ANOVA on ranks (Kruskal–Wallis). Results: The enamel blocks immersed with the 0 wt%-BG composite showed a statistically significant MH decline after 4 days, whereas the MH of enamel blocks immersed with the 10 wt%-BG composite remained unchanged up to 8 days. The enamel blocks immersed with the 20 wt%- BG composite showed no statistically significant MH change throughout the whole observation period. The pH value of the immersion medium was unchanged by the 0 wt%-BG composite, for the 10 wt% BG composite a transient pH increase was observed, while the 20 wt%-BG composite showed an extensive increase up to pH=9.8, which was maintained throughout the whole observation period. Conclusions: A dose-dependent protective effect against repeated acid attacks was identified for experimental composites functionalized with 10–20 wt% of BG 45S5.
bioactive composites ; bioactive glass ; microhardness ; remineralization ; pH
nije evidentirano
engleski
Protective effect of experimental bioactive composites on enamel – a pilot study
Aim: Bioactive glasses (BGs) can be used to render resin composites anti-cariogenic. This pilot study aimed to investigate the protective effect of experimental BG-composites on enamel immersed in a repeatedly replenished acidic solution. Materials and methods: Three experimental composites based on a photo-curable resin (60:40 wt% bisphenol-A- glycidyldimethacrylate and triethylene glycol dimethacrylate) and a total filler ratio of 70 wt% were prepared by replacing 0, 10, and 20 wt% of silanized reinforcing fillers (barium glass and silica) with unsilanized BG 45S5. Enamel blocks (3x3x1 mm, n=9) were prepared from intact human third molars. Light-cured composite specimens (diameter=7 mm, thickness=2 mm, n=3 per material) were immersed with enamel blocks in a lactic acid solution (5 mL, pH=4.0). The immersion medium was replenished every four days. Knoop microhardness (MH ; load=100 g, dwell time=20 s ; n=5 per measurement) and pH of the immersion medium were assessed at the following time points (days): 0, 4, 8, 12, 16, and 20. Statistical analysis was performed using a nonparametric one-way ANOVA on ranks (Kruskal–Wallis). Results: The enamel blocks immersed with the 0 wt%-BG composite showed a statistically significant MH decline after 4 days, whereas the MH of enamel blocks immersed with the 10 wt%-BG composite remained unchanged up to 8 days. The enamel blocks immersed with the 20 wt%- BG composite showed no statistically significant MH change throughout the whole observation period. The pH value of the immersion medium was unchanged by the 0 wt%-BG composite, for the 10 wt% BG composite a transient pH increase was observed, while the 20 wt%-BG composite showed an extensive increase up to pH=9.8, which was maintained throughout the whole observation period. Conclusions: A dose-dependent protective effect against repeated acid attacks was identified for experimental composites functionalized with 10–20 wt% of BG 45S5.
bioactive composites ; bioactive glass ; microhardness ; remineralization ; pH
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Podaci o prilogu
448-448.
2020.
nije evidentirano
objavljeno
Podaci o matičnoj publikaciji
Acta stomatologica Croatica
Karlović, Zoran ; Matijević, Jurica
0001-7019
1846-0410
Podaci o skupu
IV. kongres s Zavoda za endodonciju i restaurativnu stomatologiju Stomatološkog fakulteta Sveučilišta u Zagrebu = 4th International Congress of the Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb
predavanje
23.10.2020-24.10.2020
Zagreb, Hrvatska
Povezanost rada
Dentalna medicina