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This set of instruments is specially designed for uncapping the petrous apex, and for exenterating such part of its cellular structure as may be indicated in a given case. There are three gouges and four types of curets. The handles are especially long, and are so angulated as to enable the operator to reach readily the anterior surface of the petrous pyramid in the apex area or any other part after the temporosphenoidal lobe of the brain has been elevated.
The gouges are 2.5, 3.5 and 5 mm. wide, respectively.
The curets are upward cutting, downward cutting and forward and backward cutting. The forward cutting curet for the right side becomes a backward cutting curet for the left, while the backward cutting curet for the right side becomes a forward cutting curet for the left. With the curets we were able completely to uncap the anterior surface of the petrous
MYERSON MC, RUBIN H, GILBERT JG. INSTRUMENTS FOR OPERATION ON THE PETROUS PYRAMID. Arch Otolaryngol. 1934;20(4):575–576. doi:10.1001/archotol.1934.03600040131011