摘要
目的:探讨安氏Ⅱ1错牙合不同骨面型的颅底形态特征。方法:选取恒牙初期的正常牙合和Ⅱ1错牙合均角型、高角型、低角型的X线头颅侧位片各30张,男女各半,通过X线头影测量分析,比较Ⅱ1错牙合3种骨面型和正常牙合的颅底形态变化。结果:Ⅱ1错牙合3种骨面型均表现为颅基底角(Ba-SE-FMS)增大,高角组尤其表现在颅前基底角(FMS-SE-PM)增大,均角组、低角组颅中基底角(Ba-SE-PM)增加更为明显。Ⅱ1错牙合颅底的有效垂直高度从低角组、均角组、高角组依次减小。结论:颅基底角可能更准确反映颅底的曲度,体现Ⅱ1错牙合不同骨面型形成的机制。
PURPOSE: To explore the morphology of the cranial base in Class Ⅱ1 malocclusions with different vertical types in adolescence. METHODS: The sample of 60 males and 60 females were divided into Class II1 high-angle group, average-angle group, and low-angle group and normal occlusion group. Each group had 30 cases. Cephalograms were analyzed for all subjects. Data were obtained to have analysis of variance and LSD mutiple range test. RESULTS: The cranial floor base angle(Ba-SE-FMS)of three groups with class II1 malocclusion was increased. The anterior cranial floor angle was more open in the high angle group, and the flexure of the middle cranial floor was increased in the low angle and average angle groups. The 'effective vertical growth' of cranial floor was decreased while the mandibular plane angle was increased. CONCLUSION: The cranial floor base angle(Ba-SE-FMS)was suitable to describe the flexure of the cranial base, and indicated the mechanism of the Class II1 malocclusion with different vertical types in adolescence.
出处
《上海口腔医学》
CAS
CSCD
2004年第6期484-486,共3页
Shanghai Journal of Stomatology
关键词
Ⅱ^1错He
头影测量
高角型
低角型
颅面形态
Class II division 1 malocclusion
Cephalometrics
High angle
Low angle
Craniofacial morphology
