The advanced Activa Restorative System is a tooth-colored bioactive material that mimics the physical and chemical properties of natural teeth. This progressive has a rubberized patented resin, which helps to absorb stress and shock, it is tough and not brittle, and to chipping, crumbling and fracture. With its ability to react to the changes in the mouth, Activa chemically bonds to teeth to help seal them against bacterial leakage. In addition, it does not cause sensitivity problems and is ideal for multiple indications or restorations.