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Study reveals most accurate technique to determine center of femoral head in dysplastic hips
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This study of pediatric patients with hip dysplasia showed the modified Mose technique was the most accurate method investigated to determine of the center of the femoral head in both subluxated hips and dislocated hips.
To determine the most accurate marker to identify the center of the femoral head and to study the position of the ossific nucleus relative to this location in skeletally immature patients, researchers retrospectively analyzed 19 patients with an average age of 35.5 months who had untreated idiopathic hip dysplasia. The center of the femoral head was defined by three radiographic markers including the center of the proximal physis, the center of the ossific nucleus and a modification of Mose’s concentric circles. The true center of the head on an arthrogram was used compare each of the three points. Recorded information included age, gender and dysplasia laterality.
Results for the 22 hips showed the modified Mose technique was the most accurate method to determine the center of the femoral head. Results using the center of the femoral physis and the modified Mose technique were not significantly different in subluxated hips, indicating that both techniques were equally accurate in this subgroup.
The investigators determined the poorest indicator for the center of the femoral head in both subluxated and dislocated hips was the center of ossific nucleus. Arthrogram results revealed the ossific nuclei were located lateral and cephalad from the center of the femoral head.‒ by Monica Jaramillo
Disclosures: Cuomo reports she is part of the board or a committee member of the Pediatric Orthopaedic Society of North America. Please see the full study for a list of all other authors’ relevant financial disclosures.
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