Autologous perichondrium-cartilage graft in the treatment of total or subtotal perforations of the tympanic membrane.

Background: In myringoplasty or tympanoplasty, fascia of the temporalis mus cle and perichondrium or cartilage-perichondrium composite grafts are most commonly used to reconstruct the tympanic membrane (TM). Primary failures o r recurrent perforations in the anterior part of the TM frequently occur in cases of eustachian tube dysfunction or total perforations of the TM. The purpose of this paper is to introduce a perichondrium-cartilage composite g raft for closure of total perforations of the TM. Twenty-one patients(17 ad ults, 4 children) were included in this study, all of whom had a total perf oration of the TM. Methods: An oval shaped piece of cartilage with perichon drium on one side was harvested from the cavum conchae. The cartilage was c ut in the shape of a U without removing the inner layer of perichondrium. T he inner diameter of the cartilage ring should be nearly the same as the di ameter of the tympanic ring. This cartilage framework stabilizes and fixes the perichondrium and prevents the perichondrium from subsiding into the mi ddle ear cavity. Shrinking of the perichondrium is also reduced by the cart ilage ring. In all patients introduced in this study, the TM was closed and no residual perforation occurred. The hearing results in tympanoplasty wer e the same as in other techniques with a residual air-bone gap of about 20 dB. Conclusions: This technique seems to be a valuable method for the closu re of total perforations of the TM. Especially in perforations near the ant erior anular region the underlay technique with fascia or perichondrium is an uncertain method. The soft material which is only fixed by adhesion can easily be displaced during wound healing, The hearing results are comparabl e to that achieved in other techniques. Further studies with greater number of patients are neccessary to assess long term results.