The MC+® concept was developed for cervical degenerative pathologies to ensure the fusion of a cervical spine segment, using an anterior approach. The MC+ cage can be used alone or combined with the exclusive patented self retaining cervical anchoring clip, to increase the primary stability of the implant, whenever necessary. The cervical anchoring clip is placed into the lower vertebra through the anterior part of the cage, after implantation of the cage. Thus the surgeon has the choice of increasing the primary stabilization of the implant without having to over-distract the intersomatic space. A made-to-measure anatomical bone substitute has been developed for each size of MC+ cage. These fit the contours of the implant perfectly, ensuring the optimal filling of the interbody space. The MC+ cage is radiolucent allowing visualization of bone growth through the implant.