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[Experimental studies of the obliteration of extensive radical ear cavities with a new kind of ceramic granulate].

Modern ear surgery aims at obliterating the extensive radical cavities that remain after removal of a cholesteatoma. A wide variety of techniques have been developed, including working with muscle fascial flaps, cartilage or bone chips; osteoplastic meato-atti++----+-coantrotomy; reconstruction of the posterior auditory duct wall by ceramic dish moulds or homologous cartilage with and without obliteration of the remaining mastoid cavity. The ceramic granulate available for obliteration of the mastoid cavity is responsible for extremely high costs. In an animal experimental study, we investigated the histocompatibility of several new ceramic substances. These new ceramic materials differ especially from the conventional granulate in their implantation behaviour and also in their long-term absorption behaviour, an advantage that enables this ceramic granulate to be used on a broad scale for obliteration of the mastoid cavity and thus the implementation of a largely physiological reconstruction.