Albin Oppenheim (January 8, 1875 – November 20, 1945) was an American orthodontist who contributed significantly towards understanding in orthodontics about the biology of tooth movement.
One of his articles Tissue Changes, Particularly of the Bone, Incident to Tooth Movement was published in Angel Orthodontist in 1911.
In this publication, Dr. Oppenheim showed the movement of teeth happens due to complete reorganization of the involved bone tissue.
[1] He also showed that pull that happens from ligatures on a heavy base wire acts like a lever instead of a post in the ground.
[2] In subsequent publications later on, Dr. Oppenheim proposed that using gentle forces with long intervals of rest between had many advantages in Orthodontics.