T he purpose of this manuscript is to provide current information regarding the examination, conservative treatment, and surgical treatment for individuals with posttraumatic arthritis. The 3 major categories of arthritis are inflammatory, osteoarthritis, and posttraumatic arthritis. Rheumatoid arthritis is the most common form of inflammatory arthritis; however, it does not always affect the ankle.35 It has been reported that 10% to 50% of individuals with rheumatoid arthritis have ankle involvement. 8,16,48,60,83 The mechanical properties of the tibiotalar articular cartilage make it durable and efficient at equalizing stress. These properties may reduce the risk of osteoarthritis at the ankle. 7,37,75,77,80,86 Posttraumatic arthritis is more common than osteoarthritis at the ankle. Saltzman et al 71 reported that osteoarthritis and posttraumatic arthritis accounted for 12% and 70% of ankle arthritis cases, respectively.