IADR Abstract Archives

Water Sorption and Solubility of Composites Containing Bioactive Glass

Objectives: Experimental composites based on copper-doped mesoporous bioactive glass nanospheres (Cu-MBGN) were developed as functional restorative materials serving as a source of antimicrobial and remineralising ions. The aim of this study was to investigate the influence of Cu-MBGN on the mass change of an experimental composite material during 180 days of water storage and to compare it with conventional bioactive glass (BG) and inert fillers.
Methods: The experimental composites contained 35 wt% Bis-GMA/TEGDMA base (60/40), 55 wt% silanised barium-glass fillers and 10 wt% of either Cu-MBGN (10-CuBG), 45S5 bioactive glass (10-BG) or inert silica nanofillers (10-Si). Composite specimens were prepared and polymerised in Teflon moulds (d=5 mm, h=2 mm). Water sorption and solubility were measured by a modified ISO 4049 gravimetric method for up to 180 days. Mass change at each time point during water immersion was expressed as a percentage of the initial mass of the specimen (mean±s.d.). The results were statistically analysed using one-way ANOVA with Tukey post-hoc correction.
Results: Both composites containing bioactive glass demonstrated significantly higher mass change at all measured time points compared to the inert control material 10-Si (p<0.001), in the decreasing order 10-BG>10-CuBG>10-Si. 10-BG showed the peak of mass increase after 30 days (4.02±0.21%), followed by a decrease until the end of the measurement after 180 days. At the same time, after 30 days, the mass of 10-CuBG increased to 1.67±0.10%. 10-Si had a similar trend in mass increase (1.19±0.07% after 30 days). 10-CuBG and 10-Si showed a gradual mass increase until the measurement's end after 180 days.
Conclusions: Composite material containing copper-doped nanospherical particles of bioactive glass had a lower mass increase during water immersion than the composite with the commercial bioactive glass 45S5 but higher values than the inert control.

2024 Continental European and Scandinavian Divisions Meeting (Geneva, Switzerland)
Geneva, Switzerland
2024
0021
Dental Materials 2: Polymer-based Materials
  • Gajski, Petra  ( University of Zagreb School of Dental Medicine , Zagreb , Croatia )
  • Par, Matej  ( University of Zagreb School of Dental Medicine , Zagreb , Croatia )
  • Tarle, Zrinka  ( University of Zagreb School of Dental Medicine , Zagreb , Croatia )
  • Haugen, Håvard J.  ( University of Oslo , Oslo , Norway )
  • Zheng, Kai  ( Nanjing Medical University , Nanjing , China )
  • Boccaccini, Aldo R.  ( University of Erlangen-Nuremberg , Erlangen-Nuremberg , Germany )
  • Marovic, Danijela  ( University of Zagreb School of Dental Medicine , Zagreb , Croatia )
  • NONE
    Poster Session
    Poster Session 1.3
    Thursday, 09/12/2024 , 08:00AM - 06:00PM