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Drill bits designed to be held and revolved by a rotary device (e.g., handpiece, hand drill) to excise a small section of tissue, bone, or cartilage for laboratory examination and/or test (i.e., biopsy). These instruments typically consist of a cylindrical shank of steel or other hard metal with a uniform cross-section. These include a working end with cutting edges (e.g., twisted, helicoidally) that can hold the specimen and a notched or elongated proximal end to fit into the rotary device (e.g., handpiece).
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