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Assessing the effect of composite formulation on polymerization stress.
1Department of Biomaterials and Biomechanics, School of Dentistry, Oregon Health Sciences University, Portland 97201, USA.
Journal of the American Dental Association (1939)
|April 19, 2000
Summary
Dental composites with lower filler content reduce polymerization stress. A novel monomer, methacrylated derivative of styrene-allyl alcohol (MSAA), significantly lowered stress by 30% in experimental materials.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Polymerization stress in dental composites causes restoration failures, leading to postoperative sensitivity, marginal staining, and recurrent caries.
- Understanding and mitigating polymerization stress is crucial for improving the longevity and success of adhesive dental restorations.
Purpose of the Study:
- To measure the polymerization stress of various dental composite materials.
- To investigate the efficacy of a novel monomer, methacrylated derivative of styrene-allyl alcohol (MSAA), in reducing polymerization stress.
Main Methods:
- Evaluated eleven commercial and several experimental composite materials using a mechanical testing machine.
- Measured the maximum stress generated during material placement in a confined setting to quantify polymerization stress.
Main Results:
- A direct correlation was observed between higher filler volume and increased polymerization stress in commercial composites.
- Incorporation of MSAA into an experimental composite resulted in a significant 30% reduction in polymerization stress.
Conclusions:
- Dental composites with lower inorganic filler content exhibit reduced polymerization stress.
- Modifying traditional composite formulations with novel monomers like MSAA can effectively lower polymerization stress, enhancing restoration performance.