Frankenberger, Roland
Nassiri, Shiva
Lücker, Susanne
Lygidakis, Nikos N.
Krämer, Norbert
Article History
First Online: 6 December 2021
Conflict of interest
: RF has received research Grants from following companies: Dentsply, 3M, Ivoclar, GC, Kulzer. NK has received research grants from 3M, Pulpdent, GC, Dentsply. RF has received a speaker honorarium from Dentsply, Ivoclar, 3M, Kulzer, and ADS. NK has received speaker honorarium from Dentsply, Kulzer, GC, 3M, and ADS. SN and SL do not have any conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved with AZ 190/14 by the Ethics committee of the Justus-Liebig-University Giessen, Germany.
: Informed consent was obtained from all individual participants included in the study.