多孔聚四氟乙烯是由特氟隆和碳化纤维构成,是一种多孔结构,其气孔直径在100～500μ。气孔占有整个体积的70～90％,机体组织能长入此种植入物中而无免疫排斥反应。它为暗灰色,似毡样,可高压消毒,用剪刀或手术刀易于修剪。本研究是将它应用于重建外耳道后壁,共用于12例病人,其中11例过去已行改良乳突根治 Porous Teflon is composed of Teflon and carbon fiber, is a porous structure, the stomatal diameter of 100 ~ 500μ. Stomata account for 70-90% of the entire volume and body tissues can grow into such implants without immune rejection. It is dark gray, felt-like, autoclavable, easy to trim with scissors or a scalpel. This study is to apply it to the reconstruction of the posterior wall of the external auditory meatus for a total of 12 patients, 11 of whom have undergone previous radical mastectomy