About this article
Published Online: Jan 19, 2024
Page range: 104 - 108
DOI: https://doi.org/10.2478/aoj-1973-0005
© 1973 William R. Proffit, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
William R. Proffit
Professor and Chairman, Department of Orthodontics,
University of Kentucky College of DentistryU.S.A.