1. Institute of Applied Synthetic Chemistry and Christian-Doppler-Laboratory for Photopolymers in Digital and Restorative Dentistry; Technische Universität Wien; Getreidemarkt 9/163 MC 1060 Vienna Austria
2. Institute of Chemical Technology and Analytics; Technische Universität Wien; Getreidemarkt 9/164 1060 Vienna Austria
3. Ivoclar Vivadent AG; Bendererstrasse 2 9494 Schaan Liechtenstein