Fig. 11
From: Apical termination of root canal procedures—ambiguity or disambiguation?
Dr. Bernhard Gottlieb—reproduced from Gutmann JL. Bernhard Gottlieb’s impact on contemporary endodontology. J Hist Dent 61:(2)85-106, 2013. Erratum 61:(3) 128, 2013. (http://www.alumni-meduniwien.at/news/medizin+im+bild/bernhard+gottlieb). (http://www.alumni-meduniwien.at/news/medizin+im+bild/bernhard+gottlieb)