10:48 AM: Efficacy of Tympanoplasty without Mastoidectomy for CSOM

Abstract

5, 1, 2, 3 kHz was 5.7 dB (std deviation 4.3) for the short-term group and 6.7 dB (std deviation 4.8) for the long-term group. The postoperative air-bone gap was less than 10 dB in 87% of the short-term group and 75% of the long-term group. Preoperative minus postoperative bone conduction averages (1,2,4 kHz) were 4.6 Hz (P less than 0.001)in the short-term group and 7.2 Hz (P equal to 0.01)in the long-term group corresponding to consistent overclosure of bone conduction values. CONCLUSIONS: The self-crimping shape-memory stapes prosthesis provides excellent short-term and long-term postoperative hearing improvements and closure of the air-bone gap. The self-crimping mechanism simplifies stapes prosthesis placement and may overcome the limitations of stapes prostheses requiring manual crimping.