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Table 4 COR mean values pre- and post-op after implantation of a Bryan prosthesis compared with COR in healthy volunteers (COR-HV)

From: In cervical arthroplasty, only prosthesis with flexible biomechanical properties should be used for achieving a near-physiological motion pattern

Segment COR-HV COR pre-op COR post-op
x y x y x y
C6/7 Mean 4.9 − 1.1 7.7 − 6.3 5.7 − 1.7
SD 3.2 2.6 3.6 11.4 7.2 4.2
p    0.049 0.101 0.684 0.676
C5/6 Mean 4.8 − 4.0 5.1 − 8.1 8.5 − 5.6
SD 2.8 3.1 5.5 4.4 3.6 6.0
p    0.832 0.014 0.010 0.389
C4/5 Mean 4.8 − 3.8 6.3 − 6.8 6.5 − 7.9
SD 2.3 3.7 3.1 7.1 3.1 3.2
p    0.173 0.182 0.139 0.010
C3/4 Mean 4.8 − 5.8 9.9 − 7.3 7.4 − 7.0
SD 2.3 5.6 6.8 8.1 3.1 10.9
p    0.012 0.587 0.028 0.720