Hearing results in the second stage of open mastoidectomy: A comparison of the different techniques.

OBJECTIVE: The goal of this study was to compare the hearing results obtained through different hearing-restoration techniques in open-cavity mastoidectomy. METHODS AND MATERIAL: A total of 116 ears operated on during the second stage of open mastoidectomy were studied. The hearing gain was registered as the difference between preoperative and 1-year postoperative conversational frequency means (500, 1000, 2000 Hz). High-pitched frequencies (4000 Hz) were used equally. Two groups of studies were carried out: in one study the stapes was intact, and in the other the stapes arch was absent. The columella techniques we examined, from a hearing point of view, are total and partial ossicular replacement prostheses, ossiculoplasty, cartilage with or without perichondrium, and the myringostapediopexy. RESULTS AND
CONCLUSIONS: In the group of patients in whom the stapes was intact, the differences in high-pitched frequencies found between the different techniques were negligible, but the differences were quite significant in conversational frequencies, where the partial ossicular replacement prosthesis turned out to be the technique with the worst results. In ears in which only the footplate was present, the total ossicular replacement prosthesis gave better results than any other technique, both in conversational frequencies and in 4000-Hz frequency.