Table 1 Stages of Hallux Valgus as defined by Root et al 1977

Stage 1

Lateral displacement of the great toe (hallux) at the metatarsophalangeal joint

Minimal sesamoid displacement

Stage 2

Hallux abductus deformity (great toe pressing against the 2^nd toe)

Sesamoid displacement apparent

Stage 3

Increased intermetatarsal angle

Sesamoid displacement to level of partial disarticulation with the metatarsal head

Possible associated 2^nd hammertoe and bony adaptation of metatarsal head

Stage 4

Partial/complete dislocation of hallux at metatarsal phalangeal joint.

Hallux under-riding or over-riding lesser toes