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Biopsy trephines designed to cut and remove circular sections of bone tissue intended for laboratory examination and/or test with minimal sample and surrounding tissue damage. These trephines are typically handheld instruments consisting of hollow cylinders with a circular-saw-like serrated working edge and an integral, perpendicular handle for application of torque. Some biopsy trephines include detachable blades and a rotary powered (e.g., electric, pneumatic) surgical handpiece. Dedicated bone biopsy trephines are available for vertebral and medullar biopsy procedures.
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