Fig. 10

Distribution of the joint space obliteration owing to talar subluxation in ankle osteoarthritis. a Damage rates to the distal articular surface of the tibia and articular surface of the medial malleolus in stage 3a osteoarthritis and posterior subluxation (n = 5). The row with maximum damage of the distal articular surface was the posterior side, defined as the talar posterior subluxation. b Damage rates to the distal articular surface of the tibia and articular surface of the medial malleolus in stage 3b osteoarthritis and anterior subluxation (n = 22). The row with maximum damage of the distal articular surface was the anterior side, defined as the talar anterior subluxation. c Damage rates to the distal articular surface of the tibia and articular surface of the medial malleolus in stage 3b with posterior subluxation (n = 12). The row with maximum damage of the distal articular surface was the posterior side, defined as the talar posterior subluxation