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Table 3 COR mean values pre- and post-op: all patients—irrespective of implanted 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 7.9 − 5.1 7.7 − 4.1
SD 3.2 2.6 4.5 9.2 7.0 13.2
p    0.029 0.115 0.146 0.397
C5/6 Mean 4.8 − 4.0 6.9 − 5.9 8.3 − 5.2
SD 2.8 3.1 4.4 4.7 3.6 5.3
p    0.097 0.179 0.002 0.443
C4/5 Mean 4.8 − 3.8 6.9 − 5.7 7.1 − 7.6
SD 2.3 3.7 3.6 6.2 4.8 3.2
p    0.055 0.305 0.099 0.001
C3/4 Mean 4.8 − 5.8 7.8 − 8.6 7.5 − 8.3
SD 2.3 5.6 4.9 5.6 4.1 7.4
p    0.035 0.123 0.026 0.248