Effect of Short-Term Aging on the Flexural Strength of a Novel Experimental CAD/CAM Fiber-Reinforced Composite Material: A Pilot Study

Int J Prosthodont. Sep/Oct 2020;33(5):523-526. doi: 10.11607/ijp.6428.


Purpose: To investigate the three-point flexural strength of a novel CAD/CAM fiber-reinforced composite (FRC) material following different aging conditions.

Materials and methods: The specimens were randomly assigned to one of five groups based on aging condition: (1) control (no treatment); (2) short-term water storage; (3) thermal degradation with autoclaving; (4) chemical degradation with hydrochloric acid; and (5) chemical degradation with citric acid (n = 10 per group). The specimens in the control group received no treatment. Following each treatment protocol, the three-point bending test was used to calculate the flexural strength. Data were statistically analyzed (α = .05), and scanning electron microscopy (SEM) analysis of the specimens was conducted.

Results: No significant differences in flexural strength were observed among the groups (P = .199). In addition, no distinct morphologic differences were detected in the SEM images of the specimens.

Conclusion: The flexural strength of this novel CAD/CAM FRC material was unaffected by different aging methods.

MeSH terms

  • Composite Resins*
  • Computer-Aided Design
  • Flexural Strength*
  • Materials Testing
  • Microscopy, Electron, Scanning
  • Pilot Projects
  • Pliability
  • Stress, Mechanical
  • Surface Properties


  • Composite Resins