■ OBJECTIVE: Objective A retrospective study on the hearing results of 106 tympanoplasties withautogenous incus in chronic otitis media (COM) and cholesteatoma cases. The Amsterdam hearing evaluation plots (AHEP) concept was applied on these results.

■ MATERIALS AND METHODS: method106 patients who were operated for COM or cholesteatoma and wereimplanted with an autogenous incus were studied. Audiometrical data analysisusing the AHEP method was carried out.

■ RESULTS: The overall success of 106 tympanoplasties was an air-bone gap (ABG) closurewithin 20 dB in 71% for all the cases. Of the T2 (intact stapes suprastructure)tympanoplasties an ABG closure within 20 dB was found in 76% of the cases. An ABGclosure within 20 dB in 59% was observed in T3 (only stapes footplate present)tympanoplasties. ABG closure within 20 dB in cholesteatoma tympanoplasties was 69% while in COM this percentage was 77%.

■ CONCLUSION: AHEP's can be applied on the data of tympanoplasties with autogenousincus in COM and cholesteatoma cases. The best results with an ABG closure of<20db in tympanoplasty will be achieved in chronic ear cases and with a type 2 tympanoplasty.