[A study on the correlation between facial growth pattern and posterior-anterior ratio].

OBJECTIVE This study aimed at finding sensitive indicators in diagnosing facial growth pattern by studying the relationship between the indicators which can reflect facial growth pattern according to the previous studies and posterior-anterior ratio. METHODS The cephalometric radiographs of 61 teenage children were measured, the posterior-anterior ratio and the other 12 indicators including Y-axis angle, facial axis angle, cranial basal angle, and the four angles (The sagittal horizontal planes were analyzed using statistic methods. RESULTS The MP-SN angle was significantly coincided with the posterior-anterior ratio and Pearson coefficient is -0.922, and little correlation was found between the angles of four sagital horizontal planes and the posterior-anterior ratio. The positive correlation was found between the length of mandibular ramus and posterior-anterior ratio. CONCLUSION The sensitive indicators for confirming facial growth pattern are the posterior-anterior ratio and the MP-SN angle.