1. The axis of a long bone can be deviated by using manual force to make a greenstick or incomplete fracture when a cross-section of the bone is reduced in size by the excision of a truncated wedge of bone.
2. An osteotomy by excision of a truncated wedge transversely from a long bone at the site of a deviation deformity will permit correction manually by an incomplete fracture of the bone.
3. In malunited fractures with angulation deformities, this osteotomy prevents separation of the fragments and danger of non-union after correction.
4. Healing after a truncated-wedge osteotomy requires immobilization in a plaster cast for a minimum length of time, because there is not a complete loss of continuity and the circulation in the bone is disturbed less than after a complete osteotomy.