Table 2 Grade of 1^st metatarsophalangeal joint degeneration as defined by Regnauld 1986

Grade 1

Functional limitation of dorsiflexion, mild dorsal spurring, acute/subacute pain joint enlargement, slight joint space narrowing, no structural sesamoid disease

Grade 2

Limitation of motion (75%), broadening and flattening of the metatarsal head and base of proximal phalanx, joint space narrowing, structural first ray elevatus, osteochondral defect, metatarsalgia, sesamoid hypertrophy

Grade 3

Severe loss of joint space, ankylosis, extensive dorsal medial and lateral spurring, osteophytes may bridge the joint space, osteochondral defects of metatarsal head +/- proximal phalanx +/- joint mice, extensive sesamoid hypertrophy