Giertz-Stille Rib Shears is used to dissect Bones, Cartilage and Tough Structures. Ergonomic Design. Superior Control. Atraumatic. Giertz-Stille Rib Shears is a specialized instrument commonly used for dissecting ribs as well as other tough structures. It is frequently employed during cardiovascular procedures as well as orthopedic and trauma surgeries for efficient bone dissection to reach the internal pathology. The Giertz-Stille Rib Shear is a specialist instrument that is frequently used to dissect ribs and other difficult structures.