[Tympanoplasty in massive destruction of bony walls of the tympanic cavity].

New variants of occulotympanoplasty employing single and double--T, double--T--supporting prostheses in patients with chronic otitis media are provided. Surgical application of the flat bone and dura mater from human fetus facilitates the operative technique and reduces traumatism of the transplanted appliances. The results obtained confirm feasibility of adjusting the transformation system according to individual morphologic setting and suggest conclusions on superiority of the designs with little persistence, i.e. single and double--T prostheses.