Bone curettes are used in orthopedic surgery to remove tissues and growths, such as tumors, from bone. Common patterns include Cobb, McElroy, Lempert, Scoville, Semmes, Stille, Bruns, and Volkmann. Features include phenolic and ergonomic handles, hexagonal or triangular handles, round knurled handles, straight and angled heads, cone ring heads, graduated markings, offset angled shafts, and ebonized patterns.