Boyd and Knight classification of fractures of the body of talus divides them into two basic groups that can be further divided according to displacement.
| Type | Description |
|---|---|
| Type I - Coronal or sagittal shear fracture | |
| Type Ia | undisplaced |
| Type Ib | displacement at ankle joint |
| Type Ic | displacement at ankle and subtalar joint |
| Type Id | total displacement |
| Type II - Horizontal shear fracture | |
| Type IIa | undisplaced |
| Type IIb | displaced |
1. Boyd HB, Knight RA. Fractures of the astragalus. South Med J. 1942;35:160–167.
2. Ebraheim NA, Patil V, Owens C, Kandimalla Y. Clinical outcome of fractures of the talar body. Int Orthop. 2008 Dec;32(6):773–7.