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Properties of Nanohybrid Dental Composites-A Comparative In Vitro Study
Mihaela Păstrav1, Ovidiu Păstrav2, Andrea Maria Chisnoiu3
1Department of Orthodontics, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania.
Biomedicines
|January 26, 2024
Summary
The microstructural features of nanohybrid composites significantly impact their performance. Optimal filler distribution and lower surface roughness in materials like ClearfilMajesty (CM) and PS2 enhance color stability and strength compared to Harmonize (HU).
Area of Science:
- Materials Science
- Dental Materials
- Nanotechnology
Background:
- Investigated three nanohybrid composites: ClearfilMajesty (CM), Harmonize (HU), and an experimental PS2.
- Focused on evaluating material properties relevant to dental applications.
Purpose of the Study:
- To analyze the relationship between microstructural features and the performance of nanohybrid composites.
- To compare the surface roughness, color stability, and compression strength of commercial and experimental materials.
Main Methods:
- Fabricated disc and cylindrical specimens for testing.
- Assessed surface roughness and color stability using Atomic Force Microscopy (AFM) and CIELab tests after immersion in coffee and tea.
- Evaluated compression strength and investigated filler size/distribution via Scanning Electron Microscopy (SEM).
- Statistical analysis performed using Anova and Tukey's tests.
Main Results:
- Harmonize (HU) exhibited a mono-disperse filler system, while ClearfilMajesty (CM) and PS2 had both nano- and microfillers.
- Lower surface roughness and optimal filler lamination correlated with superior color preservation.
- Harmonize (HU) showed lower compression strength; CM and PS2 demonstrated higher strength due to complex filler systems.
Conclusions:
- The microstructural characteristics, including filler type, size, and distribution, are critical determinants of nanohybrid composite behavior.
- Materials with well-integrated nano- and microfillers offer enhanced mechanical properties and color stability.
