Anterior surgery of the cervical spine is one of the most practiced procedures in spine surgery. Its immediate accuracy and safety is proved since a long time in case of degenerative disk disease or disk herniation. But the segmental arthrodesis leads to an overload of the adjacent disk. A lot of studies have shown that the increasing mobility and pressure of the adjacent segments can be responsible of new degeneration and clinical symptoms. Recently, cervical disk prosthesis have been developed to maintain the mobility at the level of the surgery. This technique is supposed to decrease the risk of adjacent disk disease but, at this time, the analysis of the results is difficult, due to the lack of randomized studies with long term follow up.