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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

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

Fig. 2

Determination of the COR. a Graphically illustrates the determination of the COR. b The respective mathematical algorithm. c An example how the vertebral bodies in lateral flexion/extension x-rays are covered with quadrangles, the respective quadrangles of the lower vertebral body are matched, and the quadrangles of the next cranial vertebral body allow graphical or mathematical determination of the COR. d An example how the COR C6/7 can be determined using this technique

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