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  • Hand drills designed used during otologic surgical procedures involving the middle ear structures. These devices consist of a manually propelled or powered (e.g., electric, pneumatic) instrument that typically includes a chuck and other detachable components such as drill bits and burs; some middle ear drills are used with special guides. Battery operated electric drills provide autonomous operation without connection to external power sources. Middle-ear surgical hand drills frequently include special guides for particular procedures such as stapedectomy and the placing of choclear implants.
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