Influence of polymerization time of different composites on water sorption


  • Fabrício Barbosa Rocha Guimarães
  • Hugo Rocha Gomes
  • Rosimeire Silva Fonseca
  • Letizia Monteiro de Barros
  • Vítor Alexandre Marinho
  • Amanda Beatriz D. Aniceto de Freitas


Light curing, composites, water sorption


Purpose: The aim of this study was to evaluate the influence of polymerization time of different composites on water sorption. Methods: Composites used in this study were: multipurpose Z-250, packable P-60, and microfilled A-110. The specimens (n=5 per group) were build up using a cylinder Teflon matrix and grouped according composite type and polymerization time (one group as indicated by the manufacturer, half time, and double time). Water sorption was measured by specimen mass variation immediately after building up and after 24 hours for 10 days, and in 15 and 30 days. Results: Water sorption of composites was modified as a function of polymerization time. The microfilled composite showed the best performance while the multipurpose composite had the largest water sorption values when polymerization time decreased (P < 0.05). Conclusion: The results suggest that the polymerization time indicated by the manufacturer should be followed to assure good material properties independently from composite type. Key words: Light curing; composites; water sorption




Original Article