Correction of intraarticular component of Blount disease by osteotomy of epiphysis. A, Incision made into epiphyseal cartilage at its midportion medially. Curved osteotomy directed laterally and proximally to subchondral intercondylar region paralleling articular surface. B, Osteotomized tibial condyle elevated on its intercondylar cartilage hinge to position of congruity with femur; bone struts are placed into gap to maintain contact in all planes of motion and to tighten medial ligament. (From Siffert RS: Intraepiphyseal osteotomy for progressive tibia vara: case report and rationale of management, J Pediatr Orthop 2:81–85, 1982.) SEE TECHNIQUE 32.18.