Pilon fractures frequently lead to ankle arthritis. However, the risk and severity of posttraumatic subtalar arthritis is not well documented. This is relevant considering the evolving trend of acute of tibiotalocalcaneal (TTC) arthrodesis as a treatment option. Study design To better understand subtalar arthritis after pilon fractures, researchers conducted a retrospective review of 473 patients with pilon fractures treated by open reduction internal fixation. Patients were