乳突腔同种异体牙充填在开放式鼓室成形术中的应用

目的 :探讨乳突腔同种异体牙充填并上鼓室外侧壁重建的开放式鼓室成形术的手术疗效。方法 :对5 2例 (5 2耳 )胆脂瘤型及骨疡型中耳炎患者 ,根治病灶后 ,以同种异体牙乳突腔充填并上鼓室外侧壁重建 ,同期行开放式鼓室成形术。结果 :术后 4 8耳外耳道形态接近正常生理状态 ;4 6耳鼓膜移植物生长良好 ;干耳率 92 .3% ,干耳时间平均 (17.6± 4 .2 )d。术后气导听力提高在 15dBHL以上者为 4 1耳 ,气骨导差小于 2 0dBHL者为 31耳。结论 :乳突腔同种异体牙充填并上鼓室外侧壁重建的开放式鼓室成形术 ,可较好地恢复外耳道和中耳的解剖结构和生理功能 ,听力提高远期效果显著

The application of mastoid obliteration with homograft tooth in open method tympanoplasty

OBJECTIVE: To investigate the effect of open method tympanoplasty with mastoid obliteration with homograft tooth and reconstruction of the attic wall. METHOD: Fifty-two cases with cholesteatoma or skeletal ulcer otitis media were performed the open method tympanoplasty with mastoid obliteration with homograft tooth and reconstruction of the attic wall after radical mastoidectomy. RESULT: External auditory canals of 48 patients were normal in appearance. The transplanted membrane in 46 ears was survived. The dry-ears rate was 92.31% and the average time waited till dry-ears was 17.56 +/- 4.16 days. The air-conducting hearing levels of average language frequency have been enhanced over 15 dB HL in 41 ears. An air-bone gap of less than 20 dB HL was achieved in 31 ears. CONCLUSION: The open method tympanoplasty with mastoid obliteration with homograft tooth and reconstruction of the attic wall can recovery the anatomic structure and physiological function of external auditory canal and middle ear better. The long-term effect on improving hearing was significant.