Table 5.

Displacement of vertebrae in the four models (mm)

Model	Vertebrae	Flexion	Extension	Left bending	Right bending	Left rotation	Right rotation
Si-segment
OLIF + BPS	L4	0.33	0.27	0.14	0.14	0.24	0.24
OLIF + LPS	L4	1.83	1.31	0.47	0.51	0.78	0.84
Do-segment
OLIF + BPS	L3	5.53	2.56	3.70	3.72	1.83	1.80
	L4	0.44	0.27	0.13	0.13	0.25	0.24
OLIF + LPS	L3	6.79	3.86	4.13	3.89	2.39	2.35
	L4	2.23	1.31	0.56	0.58	0.73	0.83