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Orthop Clin North Am. 1994 Jul;25(3):425-65.

Deformity planning for frontal and sagittal plane corrective osteotomies.

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  • 1University of Maryland Center of Limb Lengthening and Reconstruction, Baltimore.


The authors have developed a universal system of geometric deformity planning based on the mechanical or anatomic axes. The place where the axes intersect is the center of rotation angulation (CORA) of a deformity. Osteotomy level and type should be considered relative to the CORA to avoid creating secondary deformities. This type of planning is applicable to both frontal and sagittal plane deformities.

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