Patent ID: 8366774

Claim:
A spinal cage assembly, comprising: a spinal cage comprising a support structure suitable to maintain two vertebrae separate from each other and having an interior having at least some empty space; a spin-plate engaged with said spinal cage and rotatable with respect to said spinal cage, wherein said spin-plate comprises a blade and a shaft attached to or integral with said blade, said shaft engaging with said spinal cage at a first end of said shaft and at a second end of said shaft opposed to said first end of said shaft; wherein said spin-plate comprises a first structure, and said spinal cage comprises a second structure, extending into said interior, said second structure being capable of interaction with said first structure; wherein at least a first rotational position of said spin-plate relative to said spinal cage, said first structure and said second structure are positioned relative to one another such that a first amount of torque, resulting from said interaction of said first structure and said second structure, is required to rotate said spin-plate relative to said spinal cage; wherein at least a second rotational position of said spin-plate relative to said spinal cage, said first structure and said second structure are positioned relative to one another such that a second amount of torque, resulting from said interaction of said first structure and said second structure, is required to rotate said spin-plate relative to said spinal cage; and wherein said first amount of torque is different from said second amount of torque.