Common causes of OA hip
• Primary osteoarthritis of the hip, with no apparent cause
• Developmental Dysplasia of the Hip, DDH, caused by abnormal formation of the hip joint during early stages of fetal development
• Osteonecrosis of Femoral Head, ONFH
• Post-traumatic OA Hip
• Septic Arthritis of Hip Joint
• Arthritis of various types such as Rheumatoid Arthritis and Ankylosing Spondylitis