Canal-wall-down (CWD) procedures can lead to burdensome postoperative treatment. The disadvantages of CWD cavities are associated with the need for frequent cleaning of the cavity due to debris accumulation or infections and difficulties in using hearing aids. Occasionally revision surgery to decrease or eliminate the mastoid cavity with an aim to eradicate the infection is an alternative. In cases when the mastoid cavity is very large, it is sometimes difficult to find enough autologous tissue for the obliteration. Most obliteration materials do not inhibit bacterial growth and have a tendency to resorb and retract. This can result in a difficult-to-treat discharge that extrudes the obliteration material and leads to revision surgery.
Several long term studies have shown that mastoid cavities with continuous infections and cleaning problems can be obliterated with BonAlive® granules. The BonAlive® granules have been used for more than 15 years with success for mastoid obliteration. The unique bacterial growth inhibiting feature and slow resorption profile of BonAlive® granules give distinct advantages when used to obliterate discharging and chronically infected mastoid cavities. In addition, the osteostimulative* property of BonAlive® granules supports new tissue formation in the cavities.
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