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Tympanoplasty is the surgical operation performed for the reconstruction of the eardrum (tympanic membrane) and/or the small bones of the middle ear (ossicles). ==Classification== Tympanoplasty is classified into five different types, originally described by Horst Ludwig Wullstein (1906–1987) in 1956.〔Wullstein, H. (1956), Theory and practice of tympanoplasty. The Laryngoscope, 66: 1076–1093. 〕〔(【引用サイトリンク】url=http://www.surgeryplanet.com/ear-nose-throat/tympanoplasty-myringoplasty.html )〕 # Type 1 involves repair of the tympanic membrane alone, when the middle ear is normal. A type 1 tympanoplasty is synonymous to myringoplasty. # Type 2 involves repair of the tympanic membrane and middle ear in spite of slight defects in the middle ear ossicles. # Type 3 involves removal of ossicles and epitympanum when there are large defects of the malleus and incus. The tympanic membrane is repaired and directly connected to the head of the stapes. # Type 4 describes a repair when the stapes foot plate is movable, but the crura are missing. The resulting middle ear will only consist of the Eustachian tube and hypotympanum. # Type 5 is a repair involving a fixed stapes footplate. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「tympanoplasty」の詳細全文を読む スポンサード リンク
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