A prosthesis for the replacement of multiple diseased or traumatized spinal facets comprises a portion that replaces at least a bony portion of the facets to be replaced and where the prosthesis attaches to the vertebra in a manner that does not require attachment to, or abutment against, the lamina. The scene is comprised of shading locations on a surface element of an object in the scene. The checkpoint processor further can include restart logic programmed to restore the stored checkpoint data to a replacement for failed ones of the individual Web service instance invocations. Once fused; the glass material overlay, the decorative glass materials layer and the glass tile body meld to become one homogenous glass layer, comprising the tile, that cannot delaminate. Dynamic changes or adjustment to any one of these parameters, or parameters of the audio effect images, causes a corresponding change in the correlated parameter or audio effect. The mechanism advantageously avoids storing correlation between CTX addresses and PTX addresses, thereby maintaining a zero information requirement in a nested VPN routing.