Table 4.

Denis’ spine fracture classification and vertebral anterior/posterior wall involvement, n.

	Anterior wall∗					Posterior wall∗
	No frac	Up 1/3	Mid 1/3	low 1/3	Total segments	No frac	Up 1/3	Mid 1/3	low 1/3	Total segments	Both A&P frac
Compression (n = 152)	15	123	28	7	173	152	0	0	0	152	0
Burst (n = 62)	3	49	27	4	83	0	43	38	3	84	59
Flexion-distraction (n = 32)	1	24	22	9	56	0	16	24	5	45	31
Fracture-dislocation (n = 17)	1	14	16	0	31	0	14	17	5	36	16
Total (n = 263)	20	210	93	20	343	152	73	79	13	317	106

^∗Note fracture can involve one or more segments of anterior wall and posterior wall. frac: fracture; A&P: anterior and posterior wall.