Stela achieves its ground-breaking properties through a tailored combination of BPA-free resin monomers, optimised ionglass™ fillers (SDI’s bioactive proprietary hybrid glass), and specially surface-modified amorphous silica. Stela’s outstanding mechanical properties come from a rapid curing reaction. The Stela monomers form polymeric chains and, simultaneously, these chains are rapidly and densely cross-linked to each other, forming a complex web that strongly binds the ionglass™ filler and the amorphous silica, resulting in a strong and resilient restorative material.