What is the filler percentage in flowable resins?

Flowable resins typically have a filler percentage ranging from 45% to 70%. This range is essential because the filler content impacts the viscosity, handling characteristics, and mechanical properties of the material. Flowable composites are designed to be less viscous than traditional composites, allowing them to adapt well to various cavity preparations and to flow into small spaces. The filler particles within this range provide sufficient strength and wear resistance while still maintaining the necessary flowability that characterizes these materials. A lower filler percentage would hinder the physical characteristics needed for effective use in dental applications, while a higher percentage would increase viscosity, countering the flowable nature that is essential for their application.