What is the main benefit of using high filler content in dental composites?

The primary advantage of using high filler content in dental composites is better fracture resistance. Fillers enhance the mechanical properties of the composite by providing strength and durability. When a composite contains a higher amount of filler, it can better withstand the stresses that occur in the oral environment, such as biting and chewing forces. This improved resistance to fracture is especially important in areas subject to significant mechanical loads, making the restoration more reliable and longer-lasting.

While options such as bonding strength, setting time, and esthetics can also be factors in composite performance, they are not directly tied to the high filler content in the same way that fracture resistance is. Improved bonding strength generally relates more to the adhesive properties of the materials rather than the filler concentration. Setting time may be influenced by the formulation of the composite but is not specifically enhanced by a higher filler content. Similarly, while increased filler can contribute to esthetics through a smoother finish, the primary structural benefit is the enhancement of fracture resistance.