Innominate osteotomy

Abstract

This invention provides a surgical method to treat hip diseases, including Legg-Calve-Perthes disease or developmental hip dysplasia. This method includes several surgical techniques: a transverse osteotomy of the posterior portion of supraacetabular portion, an oblique and inclined osteotomy of the anterior portion of the supraacetabulum, detachment of a bone block from iliac crest, anterolateral displacement of the distal fragment, and insertion of the bone block into the distracted space of the osteotomy site.

Description

[0001] A. Field of the Invention[0002] The invention relates to a surgical method of treating hip diseases. More specifically, the invention provides an innominate osteomy for treating diseases such as Legg-Calve-Perthes Disease, developmental hip dysplasia, or hip dislocation.[0003] B. Description of the Prior Art[0004] Legg-Calve-Perthes disease is a self-limiting hip disorder caused by a varying degree of ischemia and subsequent necrosis of the femoral head. Signs of the disorder include avascular necrosis of the proximal femoral epiphysis nucleus, abnormal growth of the physis, and eventual remodeling of regenerated bone. Typically, avascular necrosis of the femoral epiphysis results in delayed occific nucleus. Articular cartilage is nourished by synovial fluid and continues to grow. Consequently, cartilage columns become distorted with some loss of cellular components and do not undergo normal ossification. This results in an excess of calcified cartilage in the primary trabecu...

AI Technical Summary

Benefits of technology

[0010] The procedure rotates the distal section of the osteotomy site laterally and anteriorly, increasing coverage of the acetabulum over the femoral head. The procedure also establishes better concentric reduction in hips with dysplasia or dislocation. It also increases coverage of the acetabulum over the femoral head in hips with Legg-Calve-Perthes diseases to achieve better stability and remodeling of the femoral head. Additionally, the technique reduces complications by providing stability without the use of metal pins or screws. Furthermore, a patient can undergo rehabilitation earlier than with a Salter osteotomy, in part because a secondary operation is not necessary.

Problems solved by technology

This results in an excess of calcified cartilage in the primary trabecular bone.

If detected and treated after 8 years of age, the prognosis tends to be poor.

Developmental hip dysplasia involves displacement of the femoral head from the acetabulum, which disrupts the normal development of the hip joint.

Although successful in many cases, the Salter technique has many complications, such as loss of fixation with displacement of the distal fragment, stiffness, and loss of hip flexion.

Images