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The lateral semicircular canal is exposed and skeletalized to the posterior canal, where the curve has a direction directly medialward.
The bony canal is curetted with a Lempert 0000 curet on the cranial, lateral and inferior aspects. With the largest Ash excavator the bony canal is removed down to the facial canal and forward to the vestibule. The blue line of the membranous canal is exposed from the superior canal and followed backward until it disappears from view toward the posterior canal. The excavator hollows the bony wall above and below the blue line. Further curettage removes the outer bony wall of the membranous canal. The excavator enters the canal and removes the overhanging edges until the maximum width is obtained. The smallest excavator has a diameter equal to that of the canal. Bone scrapings are wiped from the excavator and the field is flooded at intervals. The canal is
GUTTERIDGE E. LINEAR FENESTRATION OF LATERAL SEMICIRCULAR CANAL USING CURETS AND DENTAL EXCAVATORS. Arch Otolaryngol. 1949;50(6):833–834. doi:https://doi.org/10.1001/archotol.1949.00700010848018
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