title: Protective influence of ossific nucleus.
authors.forename: M H
authors.initials: MH
authors.lastname: Xu
mesh_terms: D002648:Child; D002675:Child, Preschool; D005260:Female; D005271:Femur Head Necrosis / Q000517:prevention & control*; D006618:Hip Dislocation, Congenital / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery*; D006801:Humans; D008297:Male; D010006:Osteoblasts; D010012:Osteogenesis; D012680:Sensitivity and Specificity