Abstract
Objective To evaluate clinical and radiologic outcome in patients treated with a dynamic cervical
implant (DCI) or anterior cervical diskectomy and fusion (ACDF).
Study Design A prospective comparative cohort study.
Methods The study included 60 patients with one- or two-level cervical degenerative disk
disease (DDD) undergoing treatment with either DCI (n = 30) or ACDF (n = 30). Clinical and radiologic outcomes were assessed 3 and 12 months after surgery.
Clinical scoring systems included the Visual Analog Scale for Neck (VAS-N) and Arm
pain (VAS-A), the Neck Pain and Disability Scale (NPAD), and the European Quality
of Life Scale (EQ-5D).
Results Both the DCI and ACDF group showed significant clinical improvement 12 months after
surgery using the VAS-N (p = 0.034 and p < 0.001, respectively), VAS-A (p < 0.001 and p < 0.001, respectively), NPAD (p < 0.001 and p < 0.001, respectively), and EQ-5D (p < 0.001 and p < 0.001, respectively). There were no significant differences in clinical outcome
comparing both groups at the 3- and 12-month follow-up. The fusion rate at 12 months
after surgery was 39.4% and 80.0% in the DCI and ACDF groups, respectively. Radiolucency
was found in 90.9% in the DCI group at 12-month follow-up.
Conclusion The clinical results for DCI treatment are equivalent to those for ACDF in the treatment
of one- and two-level cervical DDD at 12 months after surgery. Further studies are
necessary to investigate the high rates of radiolucency and fusion associated with
DCI treatment.
Keywords
dynamic cervical implant - anterior cervical diskectomy and fusion - cervical spine
- adjacent segment disease - cervical disk arthroplasty
