Abstract
The authors have tested the suitability of Ossar® (Laake Oy, Turku, Finland) which is a bovine bone, treated with ethylenediamine, as a filling substance for bone cavities arising after surgical treatment of chronic otitis. The preparation was used in the cases of 47 patients, 18 of which had been operated on for cholesteatomatous otitis and 23 for other kinds of chronic otitis; 4 had been re-operated on for suppurating radical cavities, one for chronic mastoiditis and one for adhesive otitis. All the patients were subjected to reconstruction of the external auditory meatus, according to Palva's method, and the empty space remaining behind the musculoperiosteal patch was filled with Ossar® granules. Postoperative recovery was uneventful, and the results were followed for 6 to 12 months after the treatment. None of the ears required re-operation due to infection caused by Ossar®, as a rule the external auditory meatus retained its shape, and no cavities were formed behind the ear. In two instances, a histo...
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