[Rotational diaphyseal osteotomy (description of surgical technique).]

The article describes oblique rotational osteotomy in the region of diaphysis. The surgery is indicated in the treatment of angular deformities in this region. The principle of this method developed by O. Cech consists in the performance of partial oblique osteotomy at the level of the deformity. Subsequently, lag screw is inserted through the osteotomy. However, the screw is not fully tightened. After the insertion of the screw the osteotomy is finished and deformity corrected by rotation of fragments on the pivot represented by the screw. As soon as the correction is adequate, the lag screw is fully tightened and stabilization finished by the application of a neutralization plate. Key words: diaphyseal osteotomy, oblique rotational osteotomy, surgical technique, angular deformities of diaphysis.