Abstract: A modular tulip assembly is disclosed having a U-shaped tulip body configured to receive a collet bushing, the collet bushing having two stage ramped cut outs configured to a engage flexible wires positioned within the tulip body, the first stage holds the collet bushing in an unlocked state for attachment to a screwhead of a implanted shank, the second stage is a locked state to secure or capture the screwhead by squeezing the screwhead with flexible members of the bushing.

Abstract: A tissue retractor having a spring loaded retractor blade that provides constant downward pressure on the spine to eliminate/reduce tissue from creeping underneath the tips of the blades during use, which decreases operation time and reduces patient risk.

Abstract: A method, system, and computer program product for automatically developing objects using a plurality of context derived models residing within a computational grid. An object meta language (OML) is used to allow a programmer to define an application. Using OML, the programmer creates a document describing the required object. The OML document is submitted to a group of context derived models residing at various computational nodes on the grid. A web service is used to parse the OML document and select the appropriate node. The OML document is provided to the selected node, which applies object description variables using a transform language. The defined object is then returned to the programmer.