[Osteoplastic meato-mastoidectomy, tongue and groove technique with reciprocating microsaw for temporal removal of posterior and superior canal segment (author's transl)].

A new technique of osteoplastic operation in chronic otitis with cholesteatoma is described. It combines an optimal exposure of all middle ear spaces with the advantage of preserving the posterior canal wall. Starting from an attico-antrotomy the lateral epitympanic wall and the posterior canal wall are temporarily removed by 4 slanting cuts with the micro-saw. Thus an exposure of the middle ear as in a radical operation is achieved. After removing all pathology and reconstructing the ossicular chain and tympanic membrane the wedge-shaped canal segment is reimplanted firmly without any cleft due to the special arrangement of the saw cuts.