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This research aimed to evaluate how curvature ratio affects the stress distribution and fatigue behavior of glass ceramic restorations.

Stress Distribution and Fatigue Behavior of Simplified Glass Ceramic Restorations: Effects of Curvature Ratio of Composite Resin Substrate and Restoration Assembly

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Investigates stress distribution and fatigue behavior of glass-ceramic restorations, indicating curvature affects performance.

This research aimed to evaluate how curvature ratio affects the stress distribution and fatigue behavior of glass ceramic restorations.
Finite element analysis was conducted on three preparation curvatures: flat, 2 mm radius, and 10 mm radius.
Resin composite discs were created to simulate different curvatures for bonding with glass-ceramic restorations.
Fatigue tests were performed with 10,000 cycles at varying loads to assess failure behaviors.
Flat preparations showed the least maximum principal stress (4.5 MPa) and the highest fatigue resistance (failure load of 632.50 MPa).
Curv1 and Curv2 had higher stress concentrations and lower fatigue resistance compared to flat, with no significant differences between them.
Curv1 had a fatigue failure load of 370.00 MPa and Curv2 had 340.00 MPa, showing lower cycles for failure than the flat group.

Arcila et al. (2025) studied this question.

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