The subgroups represent a variation within the group and the one illustrated is indicated with red in the text.
A1 Extra-articular fracture, of the ulna, radius intact
.1 styloid process
.2 metaphyseal simple
.3 metaphyseal multifragmentary
A2 Extra-articular fracture, of the radius, simple
and impacted
.1 without any tilt
.2 with dorsal tilt (Pouteau-Colles)
.3 with volar tilt (Goyrand-Smith)
A3 Extra-articular fracture, of the radius,
multifragmentary
.1 impacted with axial shortening
.2 with a wedge
.3 complex
B1
Partial articular fracture, of the radius, sagittal
.1 lateral simple
.2 lateral multifragmentary
.3 medial
B2 Partial articular fracture, of the radius,
dorsal rim (Barton)
.1 lateral simple
.2 lateral multifragmentary
.3 medial
B3 Partial articular fracture, of the radius,
volar rim (reverse Barton, Goyrand-Smith II)
.1 simple, with a small fragment
.2 simple, with a large fragment
.3 multifragmentary
C1 Complete
articular fracture, of the radius, articular simple, metaphyseal simple
.1 postero-medial articular fragment
.2 sagittal articular fracture line
.3 frontal articular fracture line
C2 Complex articular fracture, of the radius,
articular simple, metaphyseal multifragmentary
.1 sagittal articular fracture line
.2 frontal articular fracture line
.3 extending into the diaphysis
C3 Complete articular fracture, of the radius,
multifragmentary
.1 metaphyseal simple
.2 metaphyseal multifragmentary
.3 extending into the diaphysis