[Changes in the value of the mandibular angle and its segments during growth]

The mandibular angle, an important roentgenocephalometric parameter, undergoes marked changes during growth and development. The dynamics of alterations of the entire mandibular angle and its two segments was studied in a sample of 200 roentgenograms of eugnathic subjects divided into homologous age groups at 10-year scale intervals to the adult age. For each age group, three roentgenocephalometric variables were statistically processed. Results, presented numerically and graphically, led to a conclusion that the size of the mandibular angle and its superior segment decreased considerably in a defined period of time. A decrease in the values of all variables was clearly seen in both adolescence and postadolescence.