安氏Ⅱ类1分类错患者亲子间相似性的个体研究

目的 研究安氏Ⅱ类1分类错he患者亲子间的相似性。方法 以家庭为单位，比较58个家庭172人的面部结构曲线多角型图及亲子间的重叠图。结果 ①安氏Ⅱ类1分类错he患者亲代的颅面结构有明显的安氏Ⅱ类凸面型倾向；②84%的家庭中子代与亲代一方或双方均值曲线相似，骨骼部相似的家庭较牙he部相似者多。结论 ①安氏Ⅱ类1分类错he有家庭聚集性；②安氏Ⅱ类1分类错he患者亲子间的相似有遗传作用的可能且骨骼部受遗传作用更强，环境对牙he部的作用更大。

Individual studies of parent-offspring similarity in class Ⅱ division 1 malocclusion

OBJECTIVE: To study the parent-offspring similarity of class II division 1 malocclusion. METHODS: On the basis of family units, the polygonic curves and superimposed graphs of parents with those of the offspring were compared. RESULTS: (1) Craniofacial structure of most parents of the class II division 1 patients have class II convex tendency. (2) The curves of the offspring resemble one or two of the parent's in 84% of the families, and the resemblance mainly concentrates in skeleton. CONCLUSIONS: (1) Class II division 1 malocclusion is characterized by familial aggregativity. (2) High probability of heredity exists in parent-offspring similarity, and we believe that hereditary factors dominate in skeletal area while in dental area there is a higher probability that environmental factors dominate.