Management of Diastasis of inferior tibio-fibular articulation is one of the most important issues in ankle injuries. Recognition, and measurement of the quantum of displacement, is paramount for proper decision making. Anthropometric study in normal individuals is therefore of great importance. Antero-posterior neutral and 150 internal rotation radiographs of both ankles of twenty volunteers who had given informed consent were obtained. The width of ankle at Tibial plafond, maximum width of the ankle, the tibiofibular overlap and tibiofibular clear space were measured. Minimum width of ankle at tibial plafond was AP view – 53mm & in 150 internal rotation views – 57mm, while maximum was 72mm & 74mm respectively. The maximum width of the ankle measured was AP view – 74mm & 150 internal rotation – 74mm, while minimum is AP view - 63.95mm & 150 internal rotation view 68.8mm.The maximum Tibiofibular overlap measured was in AP view – 23mm & 150 internal rotation view – 7mm, while minimum measured was in AP view – 6mm & 150 internal rotation view – 1mm.The maximum clear space measured was in AP view – 6mm &150 internal rotation view – 8mm, while minimum measured was in AP view – 6mm &150 internal rotation view – 3mm.There was no statically significant difference between measurements on both sides (p>0.05). We conclude that identical radiographs of both ankles in (AP) neutral &150 internal rotation view should be obtained to assess quantum of diastasis on injured side.
