• Arch Orthop Trauma Surg · Jan 1992

    The natural course of osteoarthritis of the hip due to subluxation or acetabular dysplasia.

    • Y Hasegawa, H Iwata, M Mizuno, E Genda, S Sato, and T Miura.
    • Department of Orthopaedic Surgery, Nagoya University School of Medicine, Japan.
    • Arch Orthop Trauma Surg. 1992 Jan 1; 111 (4): 187-91.

    AbstractIn 59 patients, 86 hips with subluxation or hip dysplasia were examined to determine the natural course of the condition and select suitable treatment. Thirty-three percent of the joints (13/39 hips) developed early osteoarthritis from pre-osteoarthritis within an average term of 9.2 years, while the remaining, sixty-six percent (31/47 hips) developed advanced-stage osteoarthritis from early osteoarthritis within an average term of 7.8 years. Patients were classified into advanced and non-advanced groups according to radiographic analysis of the advanced groups according to radiographic analysis of the advance of the disease and statistical analysis was performed. In pre-osteoarthritis, centre-edge angle, slope of the acetabular roof, acetabular head index, acetabular depth ratio and Japanese Orthopaedic Association (JOA) hip score were significant predictors, while in early osteoarthritis, a broken Shenton's line, cranial joint space and JOA score were significant. On the basis of multiple parameters, formulas for predicting development in patients with pre-osteoarthritis, those with early osteoarthritis, and all patients together were established, with an accuracy of 87%, 71%, and 68%, respectively.

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