Abstract
The present paper aims to survey the background and clinical implications of the dento-alveolar compensatory mechanism by which the teeth and alveolar arches are adapted to the varying jaw relationships. The background, a large individual variability in the growth pattern of the jaws, is presented in some detail. The operation of the system is described, and possible underlying factors outlined. The relation to the development of malocclusion is analysed, and some consequences for the interpretation of cephalometric analysis systems and for orthodontic treatment planning are discussed.