Abstract
The increased interest in postoperative care and the avoidance of an open cavity in mastoid and tympanoplasty surgery is a natural development in the progress of otologic surgery. The control of the pathological process, maintenance or improvement of hearing to an adequate level, and a healed ear with a minimum amount of morbidity and postoperative care is the desired goal. While it is not possible to achieve these standards in every operation, the challenge is clear and definite at the beginning of each procedure. However, certain pathological conditions inherently lead to a compromise, in fact, at the present level of our knowledge, dictate that an open mastoid cavity be maintained. These conditions which have been listed as contraindications for obliteration may also apply to closed cavity techniques and will bear repetition for the most part from a previous paper.1 Contraindications These contraindications for obliteration are as follows: (1) when

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