From: Cervical disc prostheses need a variable center of rotation for flexion / extension below disc level, plus a separate COR for lateral bending above disc level to more closely replicate in-vivo motion: MRI-based biomechanical in-vivo study
Study
ROM o (SD)
C2/C3
C3/C4
C4/C5
C5/C6
C6/C7
White and Panjabi [25]
5
5,5
4
3,5
Panjabi et al. [6]
4.8 (0.9)
4.5 (1.0)
4.7 (0.9)
3.3 (0.8)
2.7 (0.8)
Ishii et al. [14]
3.7 (2.0)
3.5 (1.4)
3.3 (1.0)
4.3 (1.4)
5.7 (1.9)
Our study
–
3.9 (2.0)
4.2 (2.9)
4.1 (3.0)
4.1 (2.8)
