Roentogenological Study of Mechanical Alignment of the Lower Extremity in Children with Coxa Vara

DOI 3 References
  • Higo Masaru
    Kagoshima Prefectural Crippled Children's Hospital, Kagoshima, Japan
  • Yoshino Shinji
    Kagoshima Prefectural Crippled Children's Hospital, Kagoshima, Japan
  • Nakamura Masahiro
    Kagoshima Prefectural Crippled Children's Hospital, Kagoshima, Japan

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  • 小児の内反股遺残変形例の下肢ａｌｉｇｎｍｅｎｔのＸ線学的検討

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Abstract

This study was undertaken to reveal radiographically each alignment of the lower extremity in 16 children with unilateral coxa vara by full-length standing anteroposterior roentogenograms. Residual coxa vara included 13 Perthes' disease, two congenital dislocation of the hip and one purulent arthritis of the hip. The average age at presentation was 13 years (range 8 to 15 years). The width of the proximal tibial epiphysis was divided equally into five zones with mechanical axis of the lower extremity. The mid-zone is normally in 13 lower extremities, the zones of physiologic range including the adjacent mid-zone were considered to be normal variance in two lower extremities, and the lateral zone was considered to be pathologic in one lower extremity. Fifteen lower extremities with mechanical axis in normal and physiologic range had no angular deformity of the knee. One patient with congenital dislocation of the hip had lateral shift of the mechanical axis line and genu valugum deformity. We believe that malalignment of the lower extremity rarely developes in children with residual coxa vara after treatment of hip disease.

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