Surgical results of modified canal wall down tympanoplasty.

CONCLUSION

Patients with mastoiditis and chronic suppurative otitis media which has small mastoids that make them ideal candidates for modified canal wall down mastoidectomy (MCWD) which contributes to a dry and spacious ear and the maintaining and improving hearing.

OBJECTIVES

To evaluate surgical outcomes for chronic otitis media underwent MCWD.

METHODS

A clinical retrospective study was performed on 47 ears with chronic otitis media which has relatively limited attic lesions have the small, sclerotic and hypocellular mastoids according to the preoperative high-resolution CT scan of the temporal bone that underwent MCWD and 32 ears with typical canal wall down operation form January 2010 to January 2016.

RESULTS

In the MCWD group, the mean preoperative air conduction (AC) threshold of 38.2 ± 1.1 dB was lowered to 31.0 ± 0.8 dB postoperatively (p < .01). The mean pre- and postoperative air-bone gaps (ABG) of all patients were 16.0 ± 1.0 dB and 9.6 ± 0.8 dB, respectively. In the canal wall down group, the mean preoperative AC threshold of 37.2 ± 1.0 dB was lowered to 32.8 ± 0.9 dB postoperatively (p < .01). The mean pre- and postoperative air-bone gap was reduced with 4.4 ± 0.4 dB (p < .01). There was statistical difference in hearing improvement between the modified canal wall down and the canal wall down group (p < .05).