作者较详尽的叙述了听骨固定的原因及其手术处理原则。一、从病种分析: 1.先天性异常:除可伴有明显的面部、耳郭及全身畸形外,有时也可发生单独的畸形,如小耳、外耳道形状异常、槌骨柄缺如等,这些情况表明可能有先天性固定存在,但不能说明固定的范围和部位。在先天性耳异常中,畸形或正常的听骨与上鼓室壁或卵圆窗常有骨性关节粘连。 2.遗传性骨疾病:(1)耳硬化症:因病灶 The author described in more detail the reasons for the fixation of ossicles and the principle of surgical treatment. First, from the disease analysis: 1. Congenital anomalies: In addition to may be accompanied by obvious facial, ear and body deformities, and sometimes may have a separate deformity, such as small ears, abnormal shape of the external auditory meatus, malformations such as missing, these The situation shows that there may be congenital fixation, but can not explain the scope and location of the fixed. In congenital auricular abnormalities, abnormal or normal ossicles and the tympanic wall or oval window often have bone and joint adhesions. 2. Hereditary bone disease: (1) otosclerosis: due to lesions