Causes of Ossiculoplasty Failure Using Porous Polyethylene (Plasti-Pore) Prostheses

Ossiculoplasty Failure with Ceramic Ossicular Replacement Prosthesis (With 1 color plate)

“…In patients 1, 4 and 6, also reoperated, the disease was very mild, but the eustachian tube tended to be blocked with almost no aerated cavity formed. Exposure or extrusion was found rela tively soon after operation in patients 5 and 8 and after a considerable duration (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) months) in the remaining 6 ears. The CORP head was found to be projecting from the newly formed tympanic membrane in 1 ear; in the remaining 7, the tympanic membrane was first perforated at a point other than that in contact with the CORP head, and the CORP was found to be exposed at or extrud- ing from the perforation.…”

“…The reported incidende of extrusion varied from 2.2% [8] to 9.3% [9], Frootko [10] recently reported rates of 38% for PORP and 27% for TORP. He stated that even the insertion of a cartilage plate [ 11 ] or soft tissue [12] between the tympanic mem brane and Plastipore does not prevent extru sion.…”

Titan als Material zum Gehörknöchelchenersatz - Grundlagen und klinische Anwendung

“…Histologisch fanden sich jedoch ausgeprägte Bindegewebshüllen, Makrophagen und Fremdkörperriesenzellen [22 -26]. Klinisch beobachtete Abstoßungsraten betrugen bis zu 80 % [27,28]. Auch Proplast (Polytetrafluorethylen-Kohlenstoff-Komposit) zeigte histologisch Fresszellaktivität [29].…”

Ossiculoplasty: autogenous bone grafts, 34 years experience

“…Autogenous bone (incus) was first used for ossicular reconstruction by Hall and Rytzner in 1957, 7 cortical bone by Hough in 1959 12 and by Zöllner in 1960. 13 Although it has been alleged that the long‐term results are poor because of atrophy there are reports of favourable experience 14–16 and of histological stability. 17–18 …”