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- Title
Effect of Water Temperature on Cyclic Fatigue Properties of Glass-fiber-reinforced Hybrid Composite Resin and Its Fracture Pattern After Flexural Testing.
- Authors
Kuroda, Soichi; Shinya, Akikazu; Vallittu, Pekka K.; Nakasone, Yuji; Shinya, Akiyoshi
- Abstract
Purpose: To evaluate in vitro the influence of dynamic loading applied to a glass-fiber-reinforced hybrid composite resin on its flexural strength in a moist, simulated oral environment. Materials and Methods: Three-point flexural strength specimens were subjected to cyclic loading in water at 37°C and 55°C to investigate the influence of immersion temperature on impact fatigue properties. Specimens were subjected to cyclic impact loading at 1 Hz for up to 5 × 105 cycles to obtain the number of cycles to failure, the number of unbroken specimens after 5 × 105 cycles, and the residual flexural strength of unbroken specimens. Maximum loads of 100, 200, and 300 N were chosen for both the non-reinforced and the glass-fiberreinforced hybrid composite resins. Results: The mean residual flexural strength for 100 N impact loading at temperatures of 37°C and 55°C was 634 and 636 MPa, respectively. All specimens fractured at fewer than 5 × 105 cycles for loads of 200 and 300 N. Conclusion: Reduced numbers of cycles to fracture and lower fatigue values were observed as both the maximum load and immersion temperature increased.
- Subjects
WATER temperature; CYCLIC fatigue; GLASS fibers; FRACTURE mechanics; FLEXURAL strength testing; DYNAMIC loads; IMPACT (Mechanics); COMPOSITE materials; BENDING strength
- Publication
Journal of Adhesive Dentistry, 2013, Vol 15, Issue 1, p19
- ISSN
1461-5185
- Publication type
Article
- DOI
10.3290/j.jad.a28884