Abstract
For the atresia auris congenita with microtia we attempted an operation as follows; the switch-back of the remnant auricle was performed according to Tanzer's method, a hole was made in the mastoid to constract the external auditory canal, and then split skin graft was used as a tympanoplasty after examining the ossicular chain.
The purpose of this procedure is to prevent the newly formed canal from its stricture due to granulation, bone proliferation, cicatricial stenosis, etc. Newly formed canal should be in the mastoid surrounded by bony walls, so it must be situated backward from its normal position. Trimming, however, of this switch-back is always available to any case in order to produce normal position.
Applying this technique to a few cases successfully, we reported these in this paper.
