[Comparison of acellular dermal allograft and tragus cartilage perichondrium in type Ⅰ tympanoplasty under otoendoscopy]

Objective:To compare the therapeutic effect of otoendoscopic tympanoplasty with acellular dermal allograft（AlloDerm） and tragus cartilage perichondrium. Method:121 patients who underwent type Ⅰ tympanoplasty under otoscope were retrospectively analyzed. According to the grafts used, they were divided into two groups: AlloDerm group （56 cases） and tragus cartilage perichondrium group （65 cases）. The operative time, postoperative tympanic membrane healing rate, and hearing recovery were compared between two groups. The follow-up time was twelve months. Result:The operative time in the AlloDerm group were lower than those in the tragus cartilage perichondrium group（P<0.05）. The successful closure rates between the acellular dermal allograft group and tragus cartilage perichondrium group at 1-month follow-up were 92.86% and 92.31% respectively, while the closure rates between two groups at 6-month follow-up were drop to 91.07% and 90.77% respectively, the closure rates between two groups at 12-month follow-up were also 91.07% and 90.77% respectively,the was no statistically difference between two groups（P>0.05）. The difference in pre-and post-operative air bone gap（ABG） values between two groups was no statistically significant（P>0.05）. Conclusion:Both the AlloDerm and the tragus cartilage perichondrium tympanoplasty can achieve satisfactory healing rate of the tympanic membrane and audiologic improvement. However, AlloDerm has a short operation time, no need to obtain materials and less trauma, and is worth of promotion and application.