1. Institute
of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt
9/163 MC, 1060 Vienna, Austria
2. Christian-Doppler-Laboratory
for Photopolymers in Digital and Restorative Dentistry, Getreidemarkt 9, 1060 Vienna, Austria
3. Institute
of Physical and Theoretical Chemistry, NAWI Graz, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
4. Ivoclar Vivadent
AG, 9494 Schaan, Liechtenstein