This book investigates the fundamental physiological mechanisms underlying the application and efficacy of functional orthodontic appliances. Authored by T. M. Graber, a recognized figure in orthodontics, the text draws upon established physiological principles and clinical observations to elucidate how these appliances influence craniofacial growth and tooth movement. The core argument centers on the biomechanical and biological responses of the stomatognathic system to functional stimuli, providing a framework for understanding treatment outcomes.

This text is recognized as a foundational work in the field of orthodontics, particularly for its in-depth exploration of the physiological underpinnings of functional appliance therapy. It is often cited for its comprehensive approach to understanding the complex interactions between biology, biomechanics, and clinical application. The book serves as a key resource for orthodontists and students seeking to grasp the scientific basis of treatment strategies.