Fig. 2From: Prevalence of and risk factors for hallux rigidus: a cross-sectional study in JapanSeverity of hallux rigidus. Grade 0: Normal. Grade 1: Preservation of joint space, mild osteophyte formation. Grade 2: Mild to moderate joint-space narrowing, moderate osteophyte formation, subchondral sclerosis and cysts. Grade 3: Severe joint-space narrowing, significant osteophyte formation, loose bodies, subchondral sclerosis and cystsBack to article page