The hip joint is made up of the acetabulum and the femoral head, which is equivalent to a “bowl” and the femoral head is equivalent to a “ball”, both of which are covered with a layer of smooth and wearable cartilage. In daily activities, this “bowl” wraps the “ball” so that it does not run out, and the “ball”, under the “bowl The “ball” can rotate in all directions under the “bowl”. In patients with hip dysplasia, the “bowl” of the acetabulum is not as well developed, and the “bowl” is not deep enough, and in some cases, the “bowl” has even become a “plate”. In some cases, the “bowl” even becomes a “plate”. Therefore, the “bowl” becomes shallow, the inclusion of the “ball” will certainly be reduced, the “ball” will have a tendency to “bowl”. tendency to run outside. In addition, when the “bowl” becomes shallower, the effective contact area between it and the “ball” is inevitably reduced, and in the case of supporting the same body weight, the pressure between the acetabulum and the femoral head of patients with hip dysplasia becomes greater, and the cartilage of the hip joint wears out more quickly. The cartilage in the hip joint wears out faster. What are the symptoms of adult developmental dysplasia of the hip (DDH)? Early stage: vague pain and soreness in the hip, joint pain after prolonged walking, soreness at the base of the thigh or deep side of the hip, hip joint pressure pain, rotational pain, the symptoms will disappear completely after resting Intermediate and late stage: shortening of limbs and limping due to subluxation of the femoral head, varying degrees of hip joint dysfunction and limitation of joint movement, increasing severity of symptoms, progressive increase in pain, unrelieved after resting, lumbar pain, radiating pain in the lower limbs, etc. Is it possible to cure adult hip dysplasia with conservative treatment? If you are a young patient with early hip dysplasia and the symptoms are not very serious at the beginning, conservative treatment is recommended, including taking more rest during the acute period, not climbing, running, walking for a long time, taking oral analgesic drugs, using topical creams and applying heat. However, all these non-surgical treatments are only “symptomatic treatment” to temporarily relieve the pain, which is not “root treatment” and does not completely solve the problem of anatomical abnormalities of hip dysplasia, and there is no medicine that can cure this disease. If the patient has obvious long and short legs and walks with a limp, it is highly recommended to use a high heel pad to keep both lower limbs of equal length, otherwise the limp of both lower limbs will lead to serious deformities of the lumbar spine, lumbar disc herniation and lumbar spinal stenosis and other symptoms. What are the surgical treatment methods for hip dysplasia? With increasing age, patients with hip dysplasia develop osteoarthritis of the hip joint (Figure A-B), resulting in significant hip pain, bilateral lower extremity inequality, and limitation of hip motion. If the pain is more pronounced and conservative treatment fails to provide relief, surgical treatment may be an option. Periprosthetic osteotomy: Indications: less than 40 years old, hip pain, mild subluxation, non-significant femoral head deformation, basically normal joint space, good correspondence between femoral head and true socket. Total hip replacement surgery: Indications: Over 40 years old, severe hip dislocation, severe femoral head deformation, narrow joint space, obvious osteoarthritis, poor correspondence between femoral head and true socket. Age is not an absolute factor limiting total hip replacement, but a comprehensive consideration of surgical treatment options based on symptoms, imaging performance, etc. is needed.