Fig. 2

a, b Right knee ROM was 0°ā40° at 1Ā year after first surgery; c no bone destruction observed in radiograph at follow-up; d frontal and lateral radiographs of right knee after fixation with a Ilizarov frame; e Ilizarov ring external fixation was implanted into the right tibia and femur, with the external fixation connected by hinges; f, g follow-up at 7Ā weeks after external fixation removal, right knee maintained ROM of 0°ā130°