Miwa S, et al. - Objectives of this study were to ascertain the accuracy of measuring the gonial angle on an orthopantomogram (GAO), as defined by the anatomic relationship between the inferior and posterior borders of the mandible and to examine the association between GAO and maximum occlusal force (MOF) in the premolar and molar regions of healthy young adults. The authors measured GAOs accurately on the orthopantomograms taken in this study and were a reliable predictor of MOF between the second premolar and first molar teeth. A smaller GAO was correlated with a greater MOF at the second premolar and first molar teeth.