A novel Z-shaped anti-rotation rod for atlantoaxial dislocation reduction: finite element analysis

Table 3 Comparison of the ROM in different models

Model	Flexion (°)	Extension (°)	Left Lateral bending (°)	Right lateral bending (°)	Left axial rotation (°)	Right axial rotation (°)
Intact model
C0-C1	7.24	16.11	3.81	3.90	4.97	4.96
C1-C2	13.16	6.16	2.07	1.96	25.97	26.05
C2-C3	3.20	2.06	4.10	3.90	1.39	1.38
Instability model
C0-C1	9.90	21.14	6.60	4.17	5.01	4.75
C1-C2	35.02	22.43	12.87	11.67	39.02	40.45
C2-C3	3.17	2.06	4.05	3.84	1.38	1.37
PS with CR
C0-C1	6.63	7.05	0.44	0.47	0.74	0.83
C1-C2	0.32	0.26	0.15	0.14	0.51	0.56
C2-C3	5.11	2.07	3.08	2.93	8.15	8.69
PS with ZR (2 mm)
C0-C1	6.63	7.05	0.44	0.46	0.75	0.83
C1-C2	0.32	0.26	0.15	0.14	0.50	0.55
C2-C3	5.11	2.07	3.08	2.29	8.15	8.69
PS with ZR (4 mm)
C0-C1	6.63	7.05	0.44	0.46	0.75	0.83
C1-C2	0.33	0.24	0.17	0.16	0.51	0.56
C2-C3	5.11	2.07	3.08	2.29	8.15	8.69
PS with ZR (6 mm)
C0-C1	6.64	7.05	0.44	0.46	0.75	0.83
C1-C2	0.34	0.24	0.18	0.16	0.51	0.56
C2-C3	5.11	2.07	3.08	2.29	8.15	8.69
PS with ZR (8 mm)
C0-C1	6.64	7.05	0.44	0.46	0.75	0.83
C1-C2	0.35	0.24	0.19	0.17	0.52	0.57
C2-C3	5.11	2.07	3.08	2.29	8.15	8.69

ISSN: 1749-799X