Naslov
Functionalizing Resin Composites with Bioactive Glass: The Effect on Microhardness

Autori
Panduric, Vlatko ; Par, Matej ; Marovic, Danijela ; Muradbegovic, Alen ; Tauböck, Tobias T ; Attin, Thomas ; Tarle, Zrinka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
PER IADR Abstract book / - , 2002, 275-275

Skup
2022 PER-IADR Oral Health Research Congress

Mjesto i datum
Marseille, Francuska, 15.-17-09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bioactive glass ; experimental composites ; microhardness

Sažetak
Objectives To evaluate the effect of functionalizing experimental composites with two types of bioactive glass on their microhardness. Methods Eight experimental composites were prepared by adding variable amounts of two bioactive glass types (conventional 45S5 formulation and a customized fluoride-containing bioactive glass) as functional fillers to experimental light-curable Bis-GMA/TEGDMA-based composites. A commercial composite was used as a reference, while the experimental composite containing only inert glass was used as a negative control. Light-cured specimens were aged for 1 day or 30 days in distilled water at 37 °C and Vickers microhardness was measured under a load of 100 g and a dwell time of 15 s. Eight specimens were used per experimental group, whereas five separate indentations were performed on different spots of the same sample and averaged to account for heterogeneity. The data were statistically analyzed using three-way ANOVA with the following factors: bioactive glass type, bioactive glass amount, and aging time (overall α=0.05). Results Microhardness values (VHN) of experimental composites ranged from 47.4–68.7 (1 day) and 46.8–64.0 (30 days). A statistically significant effect of bioactive glass type and amount was identified, with the customized fluoride-containing bioactive glass leading to statistically similar or significantly better microhardness compared to the 45S5 composition. All of the composites functionalized with the fluoride-containing bioactive glass performed similarly or better than the negative control material. For most of the materials, the 30-day artificial aging exerted no effect on microhardness, while a significant microhardness reduction due to artificial aging was identified for the composites with 10 wt% of the 45S5 composition and 40 wt% of the fluoride-containing bioactive glass. Conclusions Under the conditions of this short-term in vitro study, functionalizing experimental composites with a customized fluoride-containing bioactive glass led to improved surface microhardness compared to the traditional 45S5 composition.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

POVEZANOST RADA