The goal of this observational study is to learn how four acetabular osteotomy techniques change the shape of the hip socket in children and adolescents with developmental dysplasia of the hip or residual acetabular dysplasia.
The main questions it aims to answer are:
How do virtual Salter, Dega, San Diego, and Pemberton osteotomies differ in acetabular volume and surface shape on participant-specific three-dimensional models? How closely does the virtual result of the osteotomy actually performed match the early postoperative magnetic resonance imaging (MRI)?
Participants will have a three-dimensional pelvis-acetabulum model created from preoperative MRI. Researchers will perform virtual Salter, Dega, San Diego, and Pemberton osteotomies on that model and measure the resulting acetabular morphology. The virtual result of the osteotomy actually performed will then be compared with the participant's early postoperative MRI.
Age 2 to 18 years
Developmental dysplasia of the hip or residual acetabular dysplasia
Primary Salter, Dega, San Diego, or Pemberton acetabular osteotomy planned at Istanbul University, Istanbul Faculty of Medicine
Preoperative hip MRI available within 6 weeks before surgery
Hip pathology not related to developmental dysplasia of the hip, including Perthes disease, slipped capital femoral epiphysis, neuromuscular dysplasia, or infection/trauma sequelae
Previous surgery on the same hip that significantly alters anatomy, including prior pelvic or femoral osteotomy or open reduction, or current metal implant/fusion
MRI contraindication or safety issue, including MR-incompatible implant/device, severe claustrophobia, or a medical barrier to sedation/anesthesia
MRI not compatible with protocol or inadequate for analysis