通常认为耳硬化症所致传导性聋与镫骨底板病变的程度有关。Ｓｃｈｕｋｎｅｃｈｔ曾对耳硬化症镫骨底板固定与传导性聋的关系进行研究，认为听力损失程度取决于镫骨底板病变的分期。第一期为底板“纤维性”固定，听力损失≤３０ｄＢ；第二期，底板前部局限性骨性固定，听力损失 It is generally accepted that conductive deafness due to otosclerosis is related to the extent of sternum floor disease. Schuknecht had studied the relationship between ossification of the stapes floor and conductive deafness, and concluded that the degree of hearing loss depends on the staging of the stapes floor. The first phase of the floor “fibrous” fixed, hearing loss ≤ 30dB; the second period, the front of the floor limited bone fixation, hearing loss