同種乾燥硬膜と自家筋膜の二重グラフトによる鼓室形成術

Lyophilized Dura and Fascia Graft for Tympanoplasty

　はじめに

　鼓膜欠損の修復材料については種々の材料が用いられ，現在では側頭筋膜が最も広く利用されている^1〜4）。われわれは，以前より同種乾燥硬膜（lyophilized homograft dura，以下LHDと略）を用いて症例を積み重ねてきたが^5），鼓膜形成においてLHDと自家側頭筋膜の二重グラフトという独自の術式で良好な結果を得ることができたので報告する。

The results of repairing tympanic membrane perforations by the underlay technique in tympa-noplasty with lyophilized homograft dura (LHD)- fascia double graft in 176 ears, and those with fascia alone graft in 107 ears were compared. The grafttake rate was 96% and hearing improvement rate (more than 5dB) was 80% with LHD-fascia double graft technique. It is concluded that LHD-fascia double graft technique is better than fascia alone graft technique in the graft take rate and hearing gain, because LHD is a suitable material to promote a spatial separation between a new tympanic membrane and the promontry.