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Comparative Evaluation of Surface Roughness of Different Composite Restorative Materials after Thermocycling and
Akanksha Malik1, Anjali K Kothari1, Riya Dave2
1Department of Conservative Dentistry and Endodontics, AMC Dental College, Ahmedabad, Gujarat, India.
Background:
Direct composite restorations face abrupt temperature changes, varying pH, and surface deterioration in the oral environment. Atomic force microscopy (AFM) provides visual and numerical data on surface roughness.
Aim:
This study evaluates and compares the surface roughness of composite restorative materials after simulating oral conditions.
Materials And Methods:
Three composite groups (n = 16 each) were tested. Group A: Microhybrid, Group B: Nanofilled, and Group C: Nanohybrid. Each group was divided into four subgroups (n = 4 each): distilled water (control), black coffee, Coca-Cola, and Red Bull. After thermocycling and immersion, surface roughness was measured using AFM.
Results:
Nanocomposites with uniform monomodal fillers showed the least surface disintegration and superior properties.
Conclusion:
Resin chemistry, including filler size and matrix composition, is crucial for composite properties and performance under function.
