| 摘要 |
A spinal disc prosthesis comprises an upper flat rigid plate (12), a lower flat rigid plate (14), and a flat elastomeric core (16) interposed between said plates and adhered to the plates. A plurality of spaced-apart protuberances (28) extend outwardly from the exposed faces of the plates for engagement with vertebrae above and below the plates. A porous coating (26) covers the exposed surfaces of the plates. The elastomeric core is made of a polyolefin rubber having mechanical properties similar to natural spinal disc. |
