Biomaterials in Otology: Proceedings of the First International Symposium 'Biomaterials in Otology', April 21-23, 1983, Leiden, the Netherlands

ISBN-13: 9789400967588 / Angielski / Miękka / 2011 / 324 str.

J. J. Grote

Opis

The need for better implant materials was a stimulus for the increa sing knowledge of Biomaterial Scientists. Different surgical disciplines were very successful in the use of prostheses, especially because they based their surgery on a good cooperation with fundamental scientists. The use of alloplastic implant materials in the reconstruction of the middle ear has not always been successful. We all know the initial suc cess in the sixties and the disappointments after short term follow-up periods. Because of these failures, Otology missed contact with the new developments in Biomaterial Science. However, we must realize that in the reconstruction of a sound conducting system our most successful results are achieved with alloplastic implants. John Shea introduced the use of Teflonprostheses in the restoration of hearing in otosclerosis and ever since this has been the most rewarding reconstructive middle ear opera tion. With the development of the intact canal wall techniques and the use of homologous implant materials the problems of middle ear surgery see med to be solved. However, we now know that closed techniques have dis advantages after longer post-operative periods and the use of homologous implant materials give problems. Collection of these implants is not al ways easy and the preservation is still in discussion. Furthermore, pro blems of resorption, rejection or fixation give uncertain post-operative results. Middle ear prostheses of different new implant materials are promoted by industry and good results are published, but also disappointments after shorter or longer periods."

Spis treści

I History of Middle Ear Implants.- II Fundamental Aspects.- On alloplasts for otoloqy..- Behaviour of bioimplants in the middle ear..- Tissue response to porous materials used for ossicular replacement prostheses..- The closure of dural defects with Proplast..- Ceramic implant materials, possible applications and their limits..- Bioglass implants for otology..- Macor ceramics in soft and hard tissue..- Histological studies on the suitability of macor-ceramic implants..- Calciumphosphate ceramics: Biomaterials for middle ear implants..- Biodegradation of calciumphosphate ceramics-ultrastructural geometry and dissolubility of different calciumphosphate ceramics..- Hydroxyapatite in the infected middle ear..- An electrocochleographic study of the effect of plaster of Paris implanted in the middle ear of the guinea pig..- III Plastic Implants.- Columellar tympanoplasty..- TORPS and PORPS: Personal experiences A report on 446 operations..- Polyethylene TORPS and PORPS in otologic surgery..- Plastipore TORP with peg..- PORPs and TORPs versus allografts after five years..- Proplast and Plastipore in the middle ear..- Causes of ossiculoplasty failure using porous polyethylene (Plasti-Pore) prostheses..- Comparative study of different ossicular prostheses in tympanoplasty (Proplast, Plastipore, Ceravital). Analysis of clinical results, histopathological and hearing in the long term (250 cases)..- Plastipore prostheses for ossicular chain reconstruction in tympanoplasty..- The Histologic Appearance of Plastipore Ossicular Prostheses..- IV Ceramic Implants.- Otologic Surgery with Aluminiumoxide Ceramic Implants..- Aluminium ceramics as columella materials in ossicular reconstruction..- Current status of the development of Bioglass ossicular replacement implants..- Fundamental aspects of Bioglass and surgery with bioactive glass ceramic implants..- Our experience with Ceravital implants in middle ear surgery. (A middle term evaluation).- Macor ceramics in the middle ear..- Further observations on application of “Plasticin” in ear surgery. - six years of experience.- Are porous, tricalciumphosphate ceramic implants suitable for middle ear surgery? an experimental study of the pig’s hypotympanon, with additional preliminary clinical results..- Tympanoplasty with calciumphosphate..- Use of sintered hydroxylapatite and inert collagen in middle ear surgery..- Three years of experience with ceramic prosthesis..- Ceramics in the reconstruction of the middle ear..- Fibrinogen glue and biocompatible prostheses..- V Materials.