Fig. 2From: Comparison among perfect-C®, zero-P®, and plates with a cage in single-level cervical degenerative disc diseasea. The Perfect-C enters the cancellous bone of the vertebral body through the cortical bone, which is similar to the plate with cage system. b. The Zero-P enters the cancellous bone of the vertebral body through the endplate. c. The plate with cage system directly enters the cortical boneBack to article page