This study evaluated the safety and effectiveness of Dynamic Cervical Implants (DCI) as a form
of dynamic instrumentation to treat single level cervical disc disease. This is a prospective case study of 15 consecutive
patients, treated by the author, with single level cervical disc disease. Study duration was 3 years from October 2009 to
October 2012. These 15 cases included 10 men and 5 women. Patient’s ages ranged from 35 to 54 years (mean, 47 years).
All patients had anterior cervical discectomy with interbody DCI implantation, at a single level from C3 to C7. Placement
of the DCI implant aimed at reconstruction of the anterior column to preserve a controlled flexion and extension motion.
Materials and Methods:
Among the 15 cases, herniated cervical disc (HCD) accounted for 7 and cervical degenerative
disc disease (DDD) for 8. Neck pain was present in all cases, radiculopathy in 9 cases, radiculomyelopathy in 4 cases and
myelopathy in 2 cases. Preoperative evaluation included plain cervical x-rays including dynamic views. Magnetic resonance
imaging (MRI) was carried out routinely to confirm the clinical diagnosis.
Our study showed that the procedure was safe and easy. There were no major complications. The most common
DCI prosthesis used in this study was the 6M size with a width of 12 mm, a depth of 12 mm, and a height of 9 mm. No
implant related complications were reported. This procedure has the advantages of shorter operative time; minimal blood
loss; and early postoperative recovery. Neck pain and radiculopathy improved in 86.7% of cases, and myelopathy in 50%
of cases. Hetertopic ossification indicating fusion was not observed.
Disc replacement with DCI is a new strategy, in between ACDF & ADR. It is an intermediate solution in the
spectrum of management strategies of cervical disc diseases. Immediate dynamic stability with good clinical response and
no implant-related morbidity or complications are the main advantages of this implant.