Hearing Aid Versus Surgical Rehabilitation as Treatment of Otosclerosis: Pilot Study

Inclusion Criteria: Nosological criteria: * Unilateral or bilateral asymmetric otosclerosis * Conductive hearing loss of at least 30 dB with an average loss Rinne means greater than or equal to 20 dB (on frequencies 0.5, 1, 2, 4 kHz) * Normal tympanum * Temporal bones CT-scan showing radiologic signs of otosclerosis Related to treatment criteria: • No previous treatment for the otosclerosis Exclusion Criteria: Disease's related criteria: * Far advanced otosclerosis defined as less than 95dB air conduction at all frequencies or lower bone conduction 55dB on at least one frequency * Cochlear otosclerosis objectified on the temporal bones Ct-scan * Others clinical or radiological diagnostics: cholesteatoma, tympanic membrane perforation, geyser's syndrome, ossicular dislocation, ossicular malformation, tympanosclerosis. Associated pathologies: tympanic retraction, effects of chronic otitis, tubal dysfunction. Criteria about proposed treatments: * Anesthesia contraindications * Operative contraindication: clotting disorders, tympanum retraction and tubal dysfunction, geyser's syndrome, single ear, patient refusal. Criteria relative to study's explorations: Language barrier (questionnaires, tests), cognitive disorders. Criteria relating to previous treatment: Previous hearing aid or surgery Administrative criteria: Patients minors, incapable adults, adults under guardianship, incapable of giving consent.