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

目的研究安氏Ⅱ类1分类错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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部相似者多。结论①安氏Ⅱ类1分类错有家庭聚集性；②安氏Ⅱ类1分类错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部的作用更大。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.PubMed中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)02143-1453