| 主权项 |
1. An interbody fusion device for fusion of vertebrae, comprising: a first piece made of titanium having upper and lower surfaces, wherein the upper and lower surfaces of the first piece are configured to engage the endplates of two opposing vertebrae, the upper and lower surfaces including a plurality of barbed teeth configured to engage an endplate, and a second piece, the first piece including an inner void area configured to receive the second piece, wherein the second piece is configured to engage the first piece to slide over inner surfaces of the first piece and become seated and mated within the first piece, such that the entire second piece is located within the first piece, and wherein the second piece includes two protrusions located on the upper surface of the second piece and two protrusions located on the lower surface of the second piece, wherein each of the protrusions has a width that is shorter than its length, and the protrusions are shaped to fit within matching grooves that are located on the inner surfaces of the first piece, the grooves having a complementary shape to the protrusions such that the protrusions are dovetailed within the grooves when the first and second pieces are mated, and wherein the second piece includes a plurality of angled protrusions that lock into the matching indentations formed into the first piece, the first and second pieces when mated forming the assembled interbody fusion device that fits between two vertebrae. |
