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882.4305—Powered compound cranial drills, burrs, trephines, and their accessories.
(a) Identification.
Powered compound cranial drills, burrs, trephines, and their accessories are bone cutting and drilling instruments used on a patient's skull. The instruments employ a clutch mechanism to disengage the tip of the instrument after penetrating the skull to prevent plunging of the tip into the brain.
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