الفهرس 
Anatomy inter vertebral discOnly 14 pages are availabe for public view
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Abstract
Methods: This is a prospective and retrospective two centre comparative study trial to evaluate the results of treatment of patients with degenerative cervical disc disease by dynamic cervical implant (DCI) and total intervertebral cervical disc prostheses, (Dynalis-c) from 2009 to 2012 at Mansoura University Hospitals, Egypt and ASSISTANCE PUBLIC HOPITAUX DE PARIS (APHP), France, respectively. Ten patients with cervical DDD were operated upon with DCI in Egypt and ten patients with cervical DDD were operated upon with total intervertebral disc prosthesis (Dynalis-c) at Paris. The same inclusion and exclusion criteria were adopted for both groups. Summary & Conclusion: This technology lead to innovate two types of implants ,the total disc replacement; DYNALIS-C and an implant considered an intermediate stage between ACDF and total disc replacement is the dynamic cervical implant. The DCI allows flexion and extension only with no other movements but in contrast DYNALIS-C allows movement in all direction (3D movement). The DCI is an implant showed same results to the DYNALIS-C , This short follow up in both implants showed that using either prosthesis didn’t differ in results but as in our region with the decrease of income using DCI will be encouraging In the future, long follow up is needed for both implants. Both implants can be inserted safely with low morbidity. • There is significant improvement in clinical outcomes at 2 years postoperation. • It can restore segmental lordosis and the global alignment is preserved. • Segmental motion is preserved even up-to 2 years after implantation.