What year did Lischers publish their significant work?

Lischer's significant work was published in 1933, and this year is notable for several reasons in the field of orthodontics. This publication contributed to the understanding of tooth movement and the biological response of oral tissues during orthodontic treatment. It provided insights that helped refine treatment methods and techniques, enhancing the overall practice and scientific foundation of orthodontics.

The relevance of this year extends beyond just the publication itself; it marked a time of evolving theories about orthodontic mechanics and the biological underpinnings of tooth movement. The research and findings discussed by Lischer laid the groundwork for future innovations and practices, influencing subsequent generations of orthodontists and researchers.

In contrast, while the other years listed may correspond to other significant works or developments in orthodontics or related fields, 1933 is specifically tied to Lischer's research and contributions, which have had a lasting impact on orthodontic methodologies and theories.