关键词: 颅底, 垂直骨面型, 形态特征, 错牙合, X线头影测量

Abstract: Objective    Compare  the cranial base morphology of different vertical facial types and explore their regularity. Methods    The analysis was carried out in 69 patients who were recruited in Department of Orthodontics，Stomatological Hospital，China Medical University，from 2008 to 2010， including high angle group of 22 patients （12 males and 10 females），average angle group of 24 patients （11 males and 13 females）and low angle group of 23 patients （14 males and 9 females）. The related data were obtained by measuring their X-rays of cranial bases. Results    Cranial base angle，sella angle and cranial base angle increased from low angle to average angle and to high angle；Ba-S-FH angle and SO-Ar distance decreased from low angle to average angle and to high angle；in high angle group，the length of the post-cranial base of the high angle was the shortest，and the anterior cranial base angle of high angle increased，there being no significant statistical difference between the average angle group and the low angle group. Conclusion    Different vertical facial types and their skull structures present a certain regularity；cranial base growth is involved in the formation of different vertical facial types，and especially，post-cranial base is involved in the formation of the different vertical facial types.

Key words: cranial base, vertical facial types, morphological character, malocclusion, cephalometrics