A Clinical Study of Conductive Hearing Loss with Normal Tympanic Membrane

Abstract

Seventeen cases (nineteen ears) of conductive hearing loss with normal tympanic membrane treated were studied. Seventeen cases were as follows: 5 cases (5 ears), incudostapedial joint dislocation; 5 cases (7 ears), congenital ossicular malformation; 6 cases (7 ears) otosclerosis.
The postoper ative hearing-gain was 23.8 dB for incudostapedial joint dislocation and 21.4 dB for congenital ossicular malformation and 22.9 dB for otosclerosis.