Table 2 Hartofilakidis classification [5]
From: Current concepts in developmental dysplasia of the hip and Total hip arthroplasty
Congenital hip diseases | Description | Subtypes |
|---|---|---|
Dysplasia | The femoral head is contained within the original acetabulum despite the degree of subluxation or proximal femoral migration | A |
Low dislocation | The femoral head articulates with a false acetabulum that partially covers the true acetabulum to varying degrees | B1 The false acetabulum covers more than 50% of the true acetabulum; resembling dysplasia |
B2 The false acetabulum covers less than 50% of the true acetabulum; resembling high dislocation | ||
High dislocation | The femoral head is completely out of the true acetabulum and migrated superiorly and posteriorly to varying degrees | C1 The femoral head articulates with a false acetabulum |
C2 No false acetabulum; the femoral head is free-floating within the gluteal musculature |