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Ceramic surface conditioning, resin cement viscosity, and aging relationships affect the load-bearing capacity under fatigue of bonded glass-ceramics
- Source :
- Dapieve, K S, Velho, H C, da Rosa, L S, Pivetta, J P, Maidana, F C, Venturini, A B, Kleverlaan, C J, Pereira, G K R & Valandro, L F 2023, ' Ceramic surface conditioning, resin cement viscosity, and aging relationships affect the load-bearing capacity under fatigue of bonded glass-ceramics ', Journal of the Mechanical Behavior of Biomedical Materials, vol. 139, 105667, pp. 1-10 . https://doi.org/10.1016/j.jmbbm.2023.105667, Journal of the Mechanical Behavior of Biomedical Materials, 139:105667, 1-10. Elsevier BV
- Publication Year :
- 2023
- Publisher :
- Elsevier BV, 2023.
-
Abstract
- This study aimed to evaluate the influence of ceramic surface treatments, resin cement viscosities, and storage regimens on the fatigue performance of bonded glass-ceramics (lithium disilicate, LD; feldspathic, FEL). Ceramic discs (Ø = 10 mm; thickness = 1.5 mm) were allocated into eight groups per ceramic (n = 15), considering three factors: “ceramic surface treatment” in two levels – 5% hydrofluoric acid etching and silane-based coupling agent application (HF), or self-etching ceramic primer (E&P); “resin cement viscosity” in two levels – in high or low viscosity; and “storage regimen” in two levels – baseline, 24 h to 5 days; or aging, 180 days + 25,000 thermal cycles. Adhesive luting was performed onto glass fiber-reinforced epoxy resin discs (Ø = 10 mm; thickness = 2 mm) and the bonded assemblies were subjected to cyclic fatigue tests: initial load = 200 N; step-size = 25 N (FEL) and 50 N (LD); 10,000 cycles/step; 20 Hz. Scanning electron microscopy (SEM) inspections were performed. Regarding the LD ceramic, the fatigue behavior was reduced after aging for HF_HIGH and E&P_LOW conditions, while stable performance was observed for HF_LOW and E&P_HIGH. Regarding the FEL results, aging negatively affected HF_HIGH, E&P_HIGH, and E&P_LOW, being that only the HF_LOW condition presented a stable behavior. The failure initiated from defects on the etched surface of the ceramics, where the cross-sectional analysis commonly revealed unfilled areas. Long-term aging might induce a decrease in mechanical behavior. The ‘ceramic microstructure/surface conditioning/resin cement viscosity relationships’ modulate the fatigue performance of lithium disilicate and feldspathic glass-ceramics.
Details
- ISSN :
- 17516161
- Volume :
- 139
- Database :
- OpenAIRE
- Journal :
- Journal of the Mechanical Behavior of Biomedical Materials
- Accession number :
- edsair.doi.dedup.....5ba6fb46814d54a2e0435810bd746d9c