Fig. 23 Fig. 22 “Extracting the 4 first bicuspids as was proposed by another practitioner would have been disastrous in this case. Thank goodness her parents sought out a second opinion.” correctly diagnose and treatment plan an orthodontic case. I have found it to be a reliable predictor of treatment response to proposed treatment. Fig. 24 Fig. 25 References 1. Gerber, Jay W., D.D.S., Beistle, Richard T., D.D.S., Magill, Thomas S. Orthodontic Diagnostics: a Modified Sassouni + Cephalo-metric Analysis. 2. Greenfield, Raphael L. DDS, MSCD. Non Ex Factors. 98.5% Nonextraction Therapy Using Coordinated Arch Development. DaehancNarae Publishing, Inc. Seoul, South Korea; 2010. 3. Levandoski, Ronald R. D.M.D., The TMJ Institute of America. Intermediate Work-shop September 25 and 26, 1992. 4. Newby, Randy K. DDS. Sassouni + Archial Analysis, Part 1. JAOS Winter 2023. 5. Newby, Randy K. DDS. Sassouni + Archial Analysis, Part 2. JAOS Spring 2023. 6. Newby, Randy K. DDS. Sassouni + Archial Analysis, Part 3 . JAOS Summer 2023. 7. Witzig, John W., Spahl, Terrance J. The Clinical Management of Basic Maxillofacial Orthopedic Appliances. Volume II Diag-nosics, 1989. 18 Fall 2023 JAOS