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MECHANICAL TESTING OF A PHOTOCURED CHOPPED FIBER REINFORCED DENTAL COMPOSITE
Richard C Petersen1, Edward G Wenski2
1R&D Faculty, Inc., Biomaterials Group, Kansas City, Missouri, 64112.
International SAMPE Symposium and Exhibition : [Proceedings]. International SAMPE Symposium and Exhibition
|December 5, 2017
Summary
Adding chopped quartz fibers to dental composites significantly improves strength and toughness. This breakthrough enhances dental materials over traditional particulate-filled options.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Commercial dental composites often use particulate fillers.
- Visible-light cured dental pastes are widely used.
- Improving mechanical properties of dental composites is crucial for longevity.
Purpose of the Study:
- To validate strength improvements in dental composites by adding chopped quartz fibers.
- To compare fiber-reinforced composites against commercial controls.
Main Methods:
- Chopped quartz fibers (35 wt%) were incorporated into two commercial composites (Z100, XRV).
- Specimens were prepared and cured using visible light.
- Mechanical properties (bending stress, flexural modulus, work of fracture, impact toughness) were evaluated using ASTM standards (C 1161-94, D 256-00).
Main Results:
- Fiber-reinforced composites showed statistically significant improvements (p=0.001) in all tested mechanical properties compared to controls.
- Enhanced maximum bending stress, flexural modulus, work of fracture, and Izod impact toughness were observed.
Conclusions:
- Photocured chopped fiber reinforcement offers significant improvements over particulate-filled dental composites.
- This approach represents a breakthrough in dental material technology.
- Fiber-reinforced composites demonstrate superior mechanical performance for dental applications.
