[The formation of the middle ear cavity in primary tympanoplasty].

Creation of the middle ear cavity in primary tympanoplasty in patients with chronic purulent epi- and epimesotympanitis is made in the end of the operation after the sanative measures. The destroyed chain of the auditory ossicles is repaired using tephlon daisy-shaped graft or its modifications. The graft is covered with a thin cartilaginous plate while the membraneous defect is filled with the temporal fascia. Lateral attic wall and posterior wall of the external acoustic meatus are made of cartilaginous plates, the cavity in the mastoid process is filled with fragments of the allogenic cartilage. The fragments and cartilaginous plates are employed in creation of the artificial antrum. The above tympanomastoidoplasty has been performed in 50 patients with a persistent antiinfection result in 90% of them. The number of patients with adequate hearing increased from 21 (42%) before the operation to 36 (72)% after it. Primary tympanomastoidoplasty is the operation of choice in patients with destructive otitis media purulenta chronica.