Table 1.

Hattrup and Johnson radiographic classification of hallux rigidus

Grade	Radiographic findings
I	Preservation of joint space, mild osteophyte formation
II	Mild to moderate joint-space narrowing, moderate osteophyte formation, subchondral sclerosis and cysts
III	Severe joint-space narrowing, significant osteophyte formation, loose bodies, subchondral sclerosis and cysts