コルメラ用人工耳小骨(CORP)による耳小骨連鎖形成の経験

概要

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Two types of columella materials for tympanoplasty made of alumina ceramics (Bioceram®) were newly designed and used for ossicular reconstruction. From experience with 40 ears, the following results were obtained:(1) CORP can easily be contacted with fascia grafts because of the characteristic convex shape of its head. CORP can be trimmed to a suitable shape and length using a diamond burr.(2) CORP is supported by a nasal cartilage disc in most cases. In some cases, CORP can be fixed by the chorda tympani nerve if available, or only interposed between the tympanic membrane and the stapes in the second stage operation.(3) CORP is highly biostable even in the aerated middle ear space because of its good compatibility with the grafted fascia and stapes. In 18 months, 40 have so far been implanted with no rejection and good hearing results. Ten of the 13 ears (followed up over 6 months) had an average level of air conduction for speech frequencies within 30 dB.(4) CORP is visible through the grafted fascia both during and any time after operation. The position of CORP in the middle ear can be confirmed by X-ray because it is roentgenopaque.
耳鼻咽喉科臨床学会の論文