Abstract: The present invention relates generally to devices and methods for identifying landmarks on the anatomy of a human for reference in a surgical procedure. In certain embodiments of the present invention, a stylus body is provided with a spring member and stop with openings having different shaped portions so that when the stop is depressed it can free the stylus arm and allow rotation and/or translation and, when released, it can lock the stylus arm from rotating and/or translating.

Abstract: Various embodiment of the present invention provide a distal femoral trial that allows a surgeon to cut the central box geometry of a distal femur using an implant-shaped trial. The trial includes a cutting guide that is removable from the trial and adjustable with respect to the trial. The guide is intended to control the depth and direction of the cutting instruments used to prepare the femur for the a posterior stabilized implant.

Abstract: Embodiments of the present invention allow unlimited rotational alignment between two boundaries for alignment with anatomic landmarks while still referencing both posterior condyles for A/P sizing of the distal femur. In particular embodiments, the system provides at least one movable paddle that provides a reference point from the condyles so that the measuring assembly can be aligned to be parallel with the epicondylar axis. Once the measuring assembly is properly angled, the A/P length of the bone can then be measured from a proper reference point.