青少年正常及安氏Ⅱ类1分类错不同生长型的颌骨旋转类型  

Maxillary and mandibular rotation type in normal and Ⅱ~1 malocclusion adolescents with different growth patterns

作　　者：吴浩[1] 周力[1] 周蕾[1] 黎佶[1] 王艳民[1] 

机构地区：[1]四川大学华西口腔医院正畸科,四川成都610041

出　　处：《华西口腔医学杂志》2010年第1期48-51,56,共5页West China Journal of Stomatology

摘　　要：目的探讨青少年正常及安氏Ⅱ类1分类错不同生长型的上下颌骨旋转类型及特征。方法选取青少年正常头影侧位片158张及安氏Ⅱ类1分类错头影侧位片246张,利用线性回归法分析正常不同生长型的面高指数(FHI)与腭平面、平面及下颌平面倾斜度的相关性,建立浮动正常值表,分析正常及安氏Ⅱ类1分类错不同生长型的上下颌骨的旋转类型。结果除传统的下旋型、上旋型、离散型和聚合型4种颌骨旋转类型外,还发现有其他类型,其特点为腭平面和下颌平面中有一个平面未发生旋转,另一个发生了旋转,或2个平面均未发生旋转。在158例正常中,5种颌骨旋转类型在不同生长型中所占的比例无明显差别;而在246例安氏Ⅱ类1分类错中,5种旋转类型在不同生长型中所占的比例差别明显,垂直生长型中的下旋型及水平生长型中的聚合型显著增加。结论上下颌骨旋转除了传统的4种类型外,还存在其他类型。安氏Ⅱ类1分类错患者不同生长型中旋转类型所占比例存在差异,临床诊治时应加以考虑。Objective To investigate maxillary and mandibular rotation type and characteristics in normal and Ⅱ^1 malocclusion adolescents with different growth patterns.Methods 158 cephalometric films of normal occlusion and 246 cephalometric films of Ⅱ ^1 malocclusion aged between 10 and 13 years old were selected.Linear regression method was used to analyze the correlation between facial height index and inclination of palatal plane,occlusal plane and mandibular plane in normal occlusion,and to establish floating norm diagram.Then maxillary and mandibular rotational types in normal occlusion and Ⅱ^ 1 malocclusion with different growth patterns was clarified and their proportion was counted respectively.Results Another type was found beside from traditional ones,which was characterized by that one of the palatal plane and mandibular plane remained unchanged while the other rotated either anteriorly or posteriorly,or both planes remained unchanged.In normal occlusion with different growth patterns,the proportion of five types showed no marked difference,while in Ⅱ^1 malocclusion with different growth patterns,they displayed remarkable distinction：The proportion of downward rotation type in vertical growth pattern and converging type in horizontal growth pattern increased remarkably.Conclusion A new rotation type was put forward and the difference of five rotation types in Ⅱ^1 malocclusion would provide reference to clinical diagnosis and treatment.

关 键 词：颌骨旋转 面部生长型 浮动正常值 

分 类 号：R783.5[医药卫生—口腔医学]