Table 2.

AO classification of fracture pattern in trauma frames

AO classification	Number of patients	Further breakdown
41 – Proximal tibial (knee)
A (Extra-articular)	1	A1 – 0 A2 – 1 A3 – 0
B (Partial articular)	0	B1 – 0 B2 – 0 B3 – 0
C (Complex articular)	58	C1 – 1 C2 – 5 C3 – 52
42 – Diaphyseal
A (Simple)	25	A1 – 7 A2 – 4 A3 – 14
B (Wedge)	28	B1 – 9 B2 – 6 B3 – 13
C (Complex)	25	C1 – 6 C2 – 7 C3 – 12
43 – Distal tibial (ankle)
A (Extra-articular)	16	A1 – 9 A2 – 1 A3 – 6
B (Partial articular)	1	B1 – 1 B2 – 0 B3 – 0
C (Complex articular)	68	C1 – 16 C2 – 36 C3 – 16