对1964年至1990年间因先天性传导性耳聋而施手水的144耳（h7例）进行分析，根据本中发现及术后听力恢复情况，制无出一种新药先天性中耳畸形分类法，把先天性中耳畸形分成四类。第一类，先天性橙骨固定（44耳）；第Th类，先天性授骨固定伴听骨链畸形（55耳）；第三类，先天性听 From 1964 to 1990 due to congenital conduction deafness and hand-held water 144 cases (h7 cases) were analyzed according to this found and postoperative hearing recovery, the system does not produce a new drug congenital middle ear malformation classification , The congenital middle ear deformity is divided into four categories. The first category, congenital orange bone fixation (44 ears); Th class, congenital bone fixation with ossicular chain deformity (55 ears); The third category, congenital hearing