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. 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.