National Dental Assisting Examining Board (NDAEB) Practice Exam

Which type of composite is known for containing the largest filler particles and provides the greatest strength?

1. Microfilled Composites

2. Macrofilled Composites

3. Hybrid Composites

4. Universal Composites

The correct answer is: Macrofilled Composites

Macrofilled composites are characterized by their utilization of the largest filler particles among the types of composites, which contributes to their strength and durability. The significant size of the filler particles enhances the mechanical properties of the composite, allowing it to withstand greater stresses compared to composites with smaller filler particles. These materials are particularly effective in areas where high strength is of paramount importance, such as posterior teeth restorations, where the forces from biting and chewing are greater. While macrofilled composites may have a rougher texture and a more challenging polishing process compared to microfilled composites, their strength advantage makes them a preferred choice for certain clinical applications requiring durability. The other types of composites mentioned typically have smaller filler particles, which enhance esthetic properties like smoothness and polishability, but do not provide the same level of strength as macrofilled composites.