[Results of tympanoplasty following application of cartilage-perichondrium transplants for tympanic membrane substitution under unfavorable circumstances].

From a series of 2335 cases of ear surgery over a five-year period, the author reports on 550 cases where perichondrium cartilage from the tragus or concha was used as transplant material. Two different surgical techniques were employed. The postoperative gain in hearing and the overall incorporation rate are presented.