[Late results in the replacement of auditory ossicles with silastic prostheses]

Silastic prostheses of the middle ear proved useful in the reconstruction of the chain of auditory ossicles. Following an observation period of 6 months to 6 years they led in type PORP in a group of 49 subjects to early functional positive results in 78% and late positive results in 71%. The authors tested type TORP in 56 patients with a 57% success as regards early and late results. They used pistons only in obliterated fossae of the fenestra ovalis or in case of thick immobile plates. Despite this they achieved excellent and good early and late auditory gains in 58%. Of 105 prostheses type PORP and TORP administered during the entire observation period rejection occurred only in four subjects, i. e. in 3.8%. They inserted a strip of fascia between the cap of the prosthesis and tympanic membrane.