The fenestration technic1 advocated for permanent restoration of practical physiologic hearing in cases of otosclerosis is an endaural, plastic reconstruction of the auditory mechanism for the creation of a new air conduction apparatus. It consists of:
Creation of a troughlike fenestra of specified length and width in the bony capsule of the external semicircular canal with the aid of a polishing and burnishing burr. This fenestra is created in order to replace the nonfunctioning fenestra ovalis and thus to mobilize the labyrinthine perilymph and endolymph for air-borne sound.
Incorporation of this newly created fenestra in the external semicircular canal, which is to assume the function of the fenestra ovalis, within the confines of a newly reconstructed air-filled and hermetically sealed tympanic cavity. To accomplish this, it is necessary to:
Create a completely intact, liberated, tympanomeatal cutaneous membrane, which consists of that portion of the cutaneous lining from which
JULIUS LEMPERT. ENDAURAL FENESTRATION OF EXTERNAL SEMICIRCULAR CANAL FOR RESTORATION OF HEARING IN CASES OF OTOSCLEROSISSUMMARY REPORT OF ONE HUNDRED AND TWENTY CASES. Arch Otolaryngol. 1940;31(5):711–779. doi:10.1001/archotol.1940.00660010717001