• Guy Matgé, Peter Buddenberg, Marcus Eif, Holger Schenke, and Joerg Herdmann.
• National Neurosurgical Department, Centre Hospitalier de Luxembourg, 25 Rue de La Gare, Mamer, 8229, Luxembourg City, Luxembourg. matge@internet.lu.
• Eur Spine J. 2015 Dec 1; 24 (12): 2841-7.

PurposeThe dynamic cervical implant (DCI) is a novel motion-preserving concept for the treatment of degenerative cervical disorders. The aim of this prospective clinical study was to validate the concept and analyse clinical and radiological performance of the implant.Materials/MethodsOne hundred seventy-five consecutive patients with degenerative cervical disorders, median age, 47 years, were treated with discectomy and DCI, and followed for 2 years. Clinical outcome was evaluated with the Neck Disability Index (NDI), the SF-12, and visual analogue scale (VAS) assessment of arm and neck pain. Range of motion (ROM) and cervical alignment were analysed using radiographic imaging.ResultsAll clinical outcome measures--VAS neck and arm pain, NDI, and SF-12 mental and physical component summaries--improved significantly after surgery (each p < 0.001) and remained stable over the whole observation period. The ROM (flexion/extension) at the level treated with DCI was slightly reduced, but no significant changes could be verified at the adjacent levels. Six surgery or device-related adverse events were documented during the study.ConclusionsGood clinical and excellent radiological outcomes demonstrate that DCI is a safe and efficient treatment option in patients with degenerative cervical disorders.

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