The operative method in group A was based on a combination of verious techniques, including lateral attic wall reconstruction (scute repair), chorda tympani nerve tightening prosthesis, and prevention of adhesion formation by a absobable membrane.

• 手术方法A组包含上鼓室外壁重建(盾板修复)、鼓索神经弹压听骨、防粘连可吸收网片置入等多项综合技术。