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This film demonstrates the technique of replacement of the entire ossicular chain with an L-shaped homo-incus in cases where this is missing due to chronic otitis media (cholesteatoma). In each case the radical mastoid cavity is converted into an extended simple mastoid by reconstruction the posterior meatal bony wall with allo, cartilage (preserved septal or rips) preventing the formation of niches. The grafting method differed according to spatial condition of the bridge as well as the condition of the tegmen aditus. This is a modification of previous attempts. Good hearing result of one case is shown. [ABSTRACT FROM AUTHOR]