Fig. 3
From: Apical termination of root canal procedures—ambiguity or disambiguation?

Dr. Chapin Harris—reproduced from Prinz H. Dental Chronology, Lea & Febiger, Philadelphia, 1945
From: Apical termination of root canal procedures—ambiguity or disambiguation?
Dr. Chapin Harris—reproduced from Prinz H. Dental Chronology, Lea & Febiger, Philadelphia, 1945