hrvatski

Dugoročna apsorpcija vode i topljivost eksperimentalnih kompozitnih materijala s dodatkom dviju vrsta bioaktivnog stakla

Introduction: The aim of this study was to investigate mass changes of experimental composites over a long-term immersion in distilled water. Materials and methods: Two series of experimental composites were prepared by replacing their reinforcing fillers (total: 70 wt%) with 0, 5, 10, 20, and 40 wt% of either bioactive glass 45S5 or a low-sodium fluoride-containing bioactive glass. Three ion-releasing commercial materials were used as references. A gravimetric method adapted from the ISO 4049 protocol was used to evaluate mass changes of cured material specimens after water immersion for 1, 28, 42, 63, and 180 days. Results: Mass changes during immersion were generally more pronounced for the composite series functionalized with bioactive glass 45S5. Within both experimental composite series, the materials with the highest bioactive glass amount (40 wt%) showed a time- dependent mass decrease, indicating a solubilization that continued beyond the 180-day observation period. The final weight changes were as follows: 1.8% for the control composite, 1.4– 3.0% for the experimental composites containing bioactive glass 45S5, and 0.6– 2.1% for the experimental composites with low-sodium bioactive glass. Among the reference materials, the glass ionomer increased its mass for 5.6%, while the weight changes for the giomer and the alkasite were comparatively lower (1.1% and 0.7%, respectively). Conclusions: Both series of experimental composites demonstrated a higher extent of water sorption and solubility compared to the control composite, whereas the composite series with the low-sodium fluoride-containing bioactive glass showed lower extents of water sorption and solubility compared to the composites with bioactive glass 45S5. This study was supported by Croatian Science Foundation, project IP-2019-04-6183.

stomatološki materijali ; kompozitne smole ; topljivost ; staklo ; apsorpcija, fizikalno-kemijska

nije evidentirano

engleski

Long-term water sorption and solubility of experimental composites functionalized with two types of bioactive glass

Introduction: The aim of this study was to investigate mass changes of experimental composites over a long-term immersion in distilled water. Materials and methods: Two series of experimental composites were prepared by replacing their reinforcing fillers (total: 70 wt%) with 0, 5, 10, 20, and 40 wt% of either bioactive glass 45S5 or a low-sodium fluoride-containing bioactive glass. Three ion-releasing commercial materials were used as references. A gravimetric method adapted from the ISO 4049 protocol was used to evaluate mass changes of cured material specimens after water immersion for 1, 28, 42, 63, and 180 days. Results: Mass changes during immersion were generally more pronounced for the composite series functionalized with bioactive glass 45S5. Within both experimental composite series, the materials with the highest bioactive glass amount (40 wt%) showed a time- dependent mass decrease, indicating a solubilization that continued beyond the 180-day observation period. The final weight changes were as follows: 1.8% for the control composite, 1.4– 3.0% for the experimental composites containing bioactive glass 45S5, and 0.6– 2.1% for the experimental composites with low-sodium bioactive glass. Among the reference materials, the glass ionomer increased its mass for 5.6%, while the weight changes for the giomer and the alkasite were comparatively lower (1.1% and 0.7%, respectively). Conclusions: Both series of experimental composites demonstrated a higher extent of water sorption and solubility compared to the control composite, whereas the composite series with the low-sodium fluoride-containing bioactive glass showed lower extents of water sorption and solubility compared to the composites with bioactive glass 45S5. This study was supported by Croatian Science Foundation, project IP-2019-04-6183.

dental materials ; composite resins ; solubility ; glass ; absorption, physicochemical

nije evidentirano