PMID: 7083668Jun 1, 1982Paper

Angulation osteotomy. A trigonometric analysis

Clinical Orthopaedics and Related Research
M C Harper, S T Canale


An analysis of an angular deformity of a long bone and a corrective osteotomy is presented to demonstrate that the effective length of a long bone is significantly shortened by an angular deformity, and that this amount of shortening can be easily calculated. A comparison of proximal versus distal sites for corrective osteotomy is made to demonstrate that a proximal site is generally advantageous. A method of precisely calculating the length of the base of the appropriate corrective wedge is defined. It is shown that a closing wedge osteotomy can result in a significant increase in the effective length of an angulated bone.

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