Hardcastle

(JBJS, 64B:349, 1982)
Type A – total incongruity
A1 – homolateral
A2 – homomedial

Type B – partial incongruity
B1 – partial medial displacement; 1 st metatarsal displaced medially and/or in combination with metatarsals 2-4
B2 – partial lateral displacement; Lateral displacement of one or more lesser metatarsals

Type C – divergent
C1 – partial displacement; 1 st metatarsal displaced medially with any combination of metatarsals 2-4 displaced laterally
C2 – total displacement; 1 st metatarsal displaced medially with metatarsals 2-5 displaced laterally