Fig. 1From: Clinical and radiographic outcome of dynamic cervical implant (DCI) arthroplasty for degenerative cervical disc disease: a minimal five-year follow-upLateral radiograph showing evaluation of the cervical curvature index (CCI = (a1 + a2 + a3 + a4)/A), intervertebral height (H), the ROM of cervical spine (a + b), and the ROM of FSU (c + d)Back to article page