Effects of multilevel posterior ligament dissection after spinal instrumentation on adjacent segment biomechanics as a potential risk factor for proximal junctional kyphosis: a biomechanical study

Table 1 Absolute values of range of motion (ROM)

Segment	State	Treatment group		Control group
Segment	State	Mean (°)	SD (°)	Mean (°)	SD (°)
L1–L2	intact_cycl	9.88	3.68	9.51	1.18
	L4-L6_cycl	10.44	3.97	9.83	1.25
	L3-L6_cycl	10.73	4.07	10.29	1.23
	L2-L6_cycl	11.25	4.22	10.56	1.34
L2–L3	intact_cycl	10.47	2.56	11.27	1.65
	L4-L6_cycl	10.97	2.74	11.64	1.69
	L3-L6_cycl	11.24	2.83	12.02	1.74
	L2-L6_cycl	12.50	3.47	12.25	1.70
L3–L4	intact_cycl	1.53	0.73	1.71	0.26
	L4-L6_cycl	1.60	0.72	1.75	0.25
	L3-L6_cycl	1.66	0.75	1.82	0.24
	L2-L6_cycl	1.71	0.76	1.85	0.24
L4–L6	intact_cycl	2.58	0.81	3.16	0.84
	L4-L6_cycl	2.81	0.87	3.30	0.85
	L3-L6_cycl	2.87	0.89	3.43	0.83
	L2-L6_cycl	2.84	0.80	3.47	0.80

Absolute values of range of motion (ROM) in degrees during testing of segments L1–L2, L2–L3, L3–L4, and L4–L6 in the treatment and control groups

ISSN: 1471-2474