Abstract: An orthopaedic surgical instrument includes a patella trial and drill guide that may be used to both perform a surgical trial of the patellofemoral joint and guide the surgeon in drilling a number of anchor holes in the patella of the patient.

Abstract: A ribbon cable with desirable properties including mechanical integrity, resistance to propagation of a flame, and a compact structure is provided. The ribbon cable may be formed by wrapping a flexible layer around a plurality of parallel cable cores. The flexible layer may be adhered to itself and may conform to the outer surfaces of the cores. The flexible layer may, at its edges, overlap such that the edges may be readily adhered to each other. Some or all of the cable cores may be individually shielded. The cable may also include metal foil adjacent one or two sides of the cable cores or, in some instances, encircling the cable cores.