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

• Published in: Archives of orthopaedic and trauma surgery Vol. 111; no. 4; p. 187
• Main Authors: Hasegawa, Y, Iwata, H, Mizuno, M, Genda, E, Sato, S, Miura, T
• Format: Journal Article
• Language: English
• Published: Germany 1992
• Subjects: Acetabulum - diagnostic imaging; Activities of Daily Living; Adolescent; Adult; Aged; Female; Hip Dislocation - complications; Hip Dislocation, Congenital - complications; Hip Joint - diagnostic imaging; Humans; Male; Middle Aged; Osteoarthritis, Hip - diagnostic imaging; Osteoarthritis, Hip - etiology; Osteoarthritis, Hip - physiopathology; Radiography; Range of Motion, Articular
• ISSN: 0936-8051
• DOI: 10.1007/bf00571474

In 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.