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The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations

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  • Safoora Sahebi
  • Rashin Giti
  • Arian Sherafati

Abstract

Structural durability of screw-cement-retained implant-supported zirconia-based restorations is an important factor in choosing the best type of restoration for clinical use. This study aimed to evaluate the effects of thermocycling on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restoration. Two experimental groups (monolithic zirconia and porcelain-veneered zirconia) and a control group of porcelain-fused-to-metal restorations were fabricated via CAD-CAM (n = 14 per group). Half of the specimens of each group (n = 7) were subjected to 10000 thermal cycles. The compressive force was applied and the force leading to fracture was measured by using a Universal Testing Machine. The fractured modes were classified under a scanning electron microscope. The data were analyzed through two-way ANOVA, one-way ANOVA, and independent samples t-test (α = 0.05). Among the non-thermocycled subgroups, the monolithic zirconia specimens were significantly more fracture-resistant than the porcelain-veneered zirconia and porcelain-fused-to-metal groups (P 0.05). Thermocycling decreased the fracture resistance of all groups; however, the difference was not statistically significant (P

Suggested Citation

  • Safoora Sahebi & Rashin Giti & Arian Sherafati, 2022. "The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations," PLOS ONE, Public Library of Science, vol. 17(6), pages 1-16, June.
    • Handle: RePEc:plo:pone00:0270527
    DOI: 10.1371/journal.pone.0270527
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