Comparison Of The Clinical Outcomes Between The Artificial Disc Replacement And Anterior Fusion For Cervical Spondylosis

Objective:To evaluate the clinical results of cervical artificial disc replacement and for cervical degenerative disc disease, and to explore whether it can reduce the occurrence of adjacent segment degeneration(ASD).Methods:From January2006to January2010, a total of100cases of cervial spondylosis was retrospectively reviewed. All the patients were divided into Mobi-c group and fusion group.25case in Mobi-c group underwent Mobi-c cervical artificial disc replacement, while25case in fusion group underwented ACDF. The visual analogue scale (VAS), neck disability index (NDI), Odom scale, X-rays were used to evaluate the clinical and radiologic results. The operation time and intraoperative blood loss was also recorded.Results:All patients in fusion group and Mobi-c group were followed up after surgery for a mean of55.6±8.9and44.2±6.2months, respectively. The operation time in fusion group and Mobi-c group was135.2±49.3min,137.5±41.1min, respectively. And the blood loss in the two groups was189.5±32.2ml,163.2±55.1ml, respectively. No loosening, displacement or breakage of the implant was found in both groups and no significant difference was found between two groups (P>0.05). The VAS, NDI scores and Odom scores were improved significantly at the final follow-up visit. There is no significant difference between the two gourp. The sagittal alignment was well maintained in both groups. The total cervical spine range of motion (ROM) had no significant change for the Mobi-c group, whereas, it significantly decreased for the fusion group.Conclusions:The Mobi-c cervical artificial disc replacement can obtain the similar clinical outcomes to the anterior cervical discecctomy and fusion (ACDF) for cercical spondylosis. Compare with ACDF, it could better preserve physiological motion and biomechanics of cervical spine, and reduce the incidence of adjacent segment degeneration.