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Surface roughness of composite filling materials.
Biomaterials, Medical Devices, and Artificial Organs
|January 1, 1975
Summary
This study found that composite filling materials with optimized filler particle size and hardness polish better and resist toothbrush wear more effectively. Better polishability directly correlates with improved durability for dental restorations.
Area of Science:
- Materials Science
- Dental Materials
Background:
- Composite filling materials are widely used in restorative dentistry.
- Surface smoothness and wear resistance are critical properties for the longevity of dental restorations.
Purpose of the Study:
- To evaluate the polishability and toothbrushing wear resistance of commercial composite filling materials.
- To determine the relationship between filler properties and surface characteristics.
Main Methods:
- Assessed surface smoothness using an electronic roughness gauge.
- Measured loss of smoothness after simulated toothbrushing.
- Investigated filler particle size and hardness in test formulations.
Main Results:
- Significant differences in polishability were observed among the seven materials.
- Polishability and the ability to retain a smooth surface are linked to filler particle size and hardness.
- Optimizing filler particles for polishability enhanced wear resistance.
Conclusions:
- Filler particle characteristics are key determinants of both initial polishability and long-term surface smoothness in composite fillings.
- Improved polishability of dental composites contributes to enhanced resistance against abrasive wear from toothbrushing.