Guided Growth for the Treatment of Moderate Leg-length Discrepancy

May 2013
Orthopedics;May2013, Vol. 36 Issue 5, pe575
Academic Journal
The purpose of this study was to evaluate the effectiveness and complication rate of guided growth for the treatment of patients with a moderate leg-length discrepancy. The authors retrospectively reviewed all patients treated with guided growth for a moderate leg-length discrepancy at their institution between October 2004 and December 2010. Thirty-four patients met the inclusion criteria from an initial cohort of 105 patients. All patients were followed until screw removal or maturity occurred. Nine patients had a developmental leg-length discrepancy, and 25 had a congenital leg-length discrepancy. Average age was 12.6 years (range, 7-16 years). Average leg-length discrepancies, as measured on standing long-leg radiographs from the top of the pelvis, the top of the femoral heads, and the center of the ankle to the top of the femoral heads, were 22, 19, and 17 mm, respectively. Average discrepancies at screw removal or maturity were 13, 10, and 11 mm, respectively. Twenty of 33 patients had a leg-length discrepancy of less than 1 cm at maturity or screw removal. The leg-length discrepancy change in patients who underwent guided growth of the tibia was minimal. Leg-length discrepancies in patients who underwent guided growth of the femur or both the femur and the tibia changed by an average of 10 mm. One patient had a mechanical axis change greater than 1 zone, and 1 patient required treatment for angular deformity after being treated for a leg-length discrepancy. Guided growth is a safe and effective technique for treating moderate leg-length discrepancies.


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