Biomaterials in Otology : Proceedings of the First International Symposium ‘Biomaterials in Otology’, April 21–23, 1983, Leiden, The Netherlands

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. Front Matter....Pages I-XIV History of Middle Ear Implants....Pages 1-5 Front Matter....Pages 7-7 On Alloplasts for Otology....Pages 9-17 Behaviour of Bioimplants in the Middle Ear. an Experimental Study....Pages 18-28 Tissue Response to Porous Materials used for Ossicular Replacement Prostheses....Pages 29-40 The Closure of Dural Defects with ProplastTM....Pages 41-49 Ceramic Implant Materials, Possible Applications and their Limits....Pages 50-61 BioglassTM Implants for Otology....Pages 62-69 Macor Ceramic in Soft and Hard Tissue....Pages 70-73 Histological Studies on the Suitability of Macor-Ceramic Middle Ear Implants....Pages 74-79 Calciumphosphate Ceramics: Biomaterials for Middle Ear Implants....Pages 80-83 Biodegradation of Calciumphosphate Ceramics-Ultrastructural Geometry and Dissolubility of Different Calciumphosphate Ceramics....Pages 84-92 Hydroxyapatite in the Infected Middle Ear....Pages 93-104 An Electrocochleographic Study of the Effect of Plaster of Paris Implanted in the Middle Ear of the Guinea Pig....Pages 105-116 Front Matter....Pages 117-117 Columellar Tympanoplasty....Pages 119-126 Torps and Porps: Personal Experiences a Report on 446 Operations....Pages 127-136 Polyethylene Torps and Porps in Otologic Surgery....Pages 137-152 Plastipore Torp with Peg....Pages 153-154 PORPs and TORPs Versus Allografts After Five Years....Pages 155-160 Proplast and Plastipore in the Middle Ear....Pages 161-168 Causes of Ossiculoplasty Failure Using Porous Polyethylene (Plasti-Pore) Prostheses....Pages 169-176 Front Matter....Pages 117-117 Comparative Study of Different Ossicular Prostheses in Tympanoplasty (Proplast, Plastipore, Ceravital), Analysis of Clinical Results, Histo-Pathological and Hearing in the Long Term (250 Cases)....Pages 177-186 PlastiporeTM Prostheses for Ossicular Chain Reconstruction in Tympanoplasty....Pages 187-198 The Histologic Appearance of PlastiporeTM Ossicular Prostheses....Pages 199-202 Front Matter....Pages 203-203 Otologic Surgery with Aluminumoxide Ceramic Implants....Pages 205-209 Aluminium Ceramics as Columella Materials in Ossicular Reconstruction....Pages 210-219 Current Status of the Development of Bioglass R Ossicular Replacement Implants....Pages 220-229 Fundamental Aspects of Bioglass and Surgery with Bioactive Glass Ceramic Implants....Pages 230-241 Our Experience with Ceravital r Implants in Middle Ear Surgery.(a Middle Term Evaluation)....Pages 242-247 Macor Ceramics in the Middle Ear....Pages 248-249 Further Observations on Application of “Plasticin” in Ear Surgery....Pages 250-261 Are Porous, Tricalcium Phosphate Ceramic Implants Suitable for Middle Ear Surgery? An Experimental Study of the Pig’s Hypotympanon, with Additional Preliminary Clinical Results....Pages 262-273 Tympanoplasty with Calciumphosphate....Pages 274-280 Use of Sintered Hydroxylapatite and Inert Collagen in Middle Ear Surgery....Pages 281-289 Three Years of Experience with Ceramic Prosthesis....Pages 290-293 Ceramics in the Reconstruction of the Middle Ear....Pages 294-298 Fibrinogen Glue and Biocompatible Ossicular Prostheses....Pages 299-302 Back Matter....Pages 303-308 Proceedings of the first international symposium `Biomaterials in Otology' April 21-23, 1983, Leiden, The Netherlands