Abstract
Mastoid obliteration during chronic otitis media (COM) surgery could improve hearing results by enhancing the acoustic properties of the external auditory canal. The obj ective of this study was to compare postoperative hearing results by type of tympanoplasty with mastoid obliterat ion during COM surgery. Twenty-five COM patients (25 ears) underwent tympanoplasty type III during canal wall down (CWD) mastoidectomy and mastoid obliteration: 10 patients underwent classic tympanoplas ty type III (group I), and 15 patients underwent columellarization between the tympanic membrane and the stapes head with a partial ossicular replacement prosthesis or cartilage (group II). Hearing results and complic ations were compared between the 2 groups. Postoperative air-bone gap (ABG) levels within 20 dB were 30% a nd 60% in group I and group II, respectively. Closure of the ABG was significantly better in group II than in group I (p＜0.05). No serious complications were observed in either group. In CWD tympanomastoidectomy with mastoid obliteration, tympanoplasty using strut results in greater hearing improvement than does classic tympanoplasty type III.Key Words: Otitis media; Obliteration; Tympanoplasty
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