Type II tympanoplasty: When incus and malleus were eroded off with normal stapes , bone cortex was fixed to the head of stapes in order to make the stapes connect to the artificial tympanic membrane.

• 型镫骨加高术:镫骨正常,镫骨以外的听骨腐损,在镫骨头上固定骨皮质,使镫骨加高与人工鼓膜相接。