Iatrogenic incudostapedial joint dislocation in transcanal tympanoplasty.
PURPOSE: To report the result of transcanal tympanoplasty using Lyodura as a graft. MATERIALS AND METHODS: One hundred thirty-seven patients with chronic suppurative otitis media with a dry perforation were considered for tympanoplasty. The transcanal permeatal approach was adopted. Lyodura as a ready-made graft was used. RESULTS: The success rate of the graft was 78%. Latrogenic incudostapedial joint dislocation was found in six patients (4.4%), and sensorineural hearing loss occurred in nine patients (6.5%). CONCLUSION: The use of thick dura as a graft for repair of the tympanic membrane may result in damage to the ossicular chain or dislocation of the incudostapedial joint when used as underlay. Excessive manipulation of the ossicles or drilling should be avoided.