Figure 5From: A simplified guide ruler from numeric table method in doing rotational osteotomy Use of the ruler in least curve change strategy in small radius region. Assuming that the cross-section of the bone is perfect ellipse, when we decide to fix the osteotomized bone with least curve change across bones, the chord distance (t) would be smaller that is accompanied by a larger regional curvature, i.e., a smaller regional radius (r).Back to article page