发育性髋关节异常(Developmental Dysplasia ofthe Hip,简称DDH)是婴幼儿骨骼系统最常见的疾病之一,约1%~10%的新生儿出生时有髋关节发育不良、脱位及半脱位倾向,它是成年人退化性髋关节炎的主要原因[1]。为了解我区婴儿DDH现状,我院于2008-2009年对出生后42d体检婴儿进行DDH检 Developmental Dysplasia of the Hip (DDH) is one of the most common diseases of the skeletal system in infants. About 1% to 10% of newborns have hip dysplasia, dislocation and subluxation at birth. Is the main cause of adult degenerative hip arthritis [1]. In order to understand the status quo of infant DDH in our district, our hospital conducted DDH tests on babies born at 42 days after birth from 2008 to 2009