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4Sagittal plane osteotomy

Intraoperatively the correction is visualized by placing 2 mm marker drill bits parallel with the proximal and distal joint surfaces and perpendicular to the long axis of the limb at the site of drill bit placement. The correction is then achieved with the osteotomy until the drill bits are parallel in all planes. At this point the fixation is placed perpendicular to the sagittal osteotomy and interfragmentary and axial compression used to create stability.