Ball and socket ankle joints.
D000842:Ankle / Q000601:surgery; D000843:Ankle Joint; D000844:Ankylosis / Q000150:complications; D001174:Arthrodesis; D005531:Foot Deformities, Acquired / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D005532:Foot Deformities, Congenital; D006801:Humans; D011859:Radiography; D013580:Synostosis / Q000150:complications / Q000000981:diagnostic imaging; D013628:Talus / Q000002:abnormalities* / Q000000981:diagnostic imaging