恒牙早期安氏Ⅱ类前牙开[牙合]的三维颅面结构特征  

The three-dimensional craniofacial structure of classⅡ anterior openbite in early permanent dentition stage

作　　者：陈辉[1] 王邦康[1] 

机构地区：[1]首都医科大学附属北京口腔医院,北京100050

出　　处：《现代口腔医学杂志》2000年第6期391-393,共3页Journal of Modern Stomatology

摘　　要：目的　系统描述年轻恒牙期前牙开牙合的三维颅面结构特征。方法　 2 7例 11～ 16岁开牙合少年作为实验对象 ,通过三维头影测量系统 ,计算出各指标的实际测量值 ,与同年龄段正常牙合、安氏Ⅱ1分类非开牙合少年采用同一技术所得的测量均值进行比较。结果与结论　①长度方向 :Ⅱ类开牙合中Ⅱ类牙合关系的产生主要是因为下颌的后缩。同时下前牙的前突在Ⅱ类开牙合中表现明显。②宽度方向 :Ⅱ类开牙合的宽度发育不足。③高度方向 :Ⅱ类开牙合的前面部垂直向发育过度。Objective To systematically describe the three-dimensional craniofacial structure of class Ⅱ openbite in cerly permanent dentition stage.Methods Twenty-seven juvenile subjects were evaluated as the experimental group.By a three-dimension cephalometry system,the spacewise of each landmark was established in order to get the true value of each variable.The results were compared with the control groups at same age:the normal occlusion group and the class Ⅱ 1 malocclusion without openbite group.Results & Conclusion ①In a length direction,the cause of Class Ⅱ openbite is mainly the mandibular retrusion.And the protrusion of mandibular incisors is significantly shown.②In a width direction,the width of Class Ⅱ openbite is underdevelopment.③In a height direction,the anterior facial height of Class Ⅱ openbite is highly developed.And the female group even has a high-angle facial type.

关 键 词：恒牙 安氏Ⅱ类前牙[牙合] 

分 类 号：R783.5[医药卫生—口腔医学]