Fillers with particle sizes in the nano meter range („nanoparticles“) show a strong tendency of aggregation and agglomeration. Therefore they do not reach their full potential for improvements of the properties of the composite (e.g. shrinkage, modulus, mechanical strength). These aggregated and agglomerated nano particles are know for a long time and are used in dental materials (Impression materials, composites) for many years. The challenge is to provide these particles in separated morphology. With the technology used in Edelweiss Composites the particles can be separated to a great extend. This is shown in the left picture. Here the nano particles can reach their full potential for improvements of shrinkage, modulus and mechanical strength.