Biodegradation of tracheal carbon implant in animal experiment
Journal Title: Otolaryngologia Polska - Year 2008, Vol 62, Issue 4
Abstract
Introduction. The radical treatment of tracheal stenosis comprises segmental resection and its reconstruction. The most successful type of reconstruction is the “end to end” technique. In cases with large tracheal defects (over 6 cm) this kind of reconstruction is impossible. From many years the adequate biomaterial is searched for the tracheal reconstruction. Most of the implanted biomaterials undergo biodegradation process. Aim. The aim of the study was to analyze the biodegradation process in carbon fi bers of prosthesis implanted in tracheal defects in animal experiment. Material and methods: We studied the prosthesis implanted in tracheal defects in sheep. The prosthesis were built with composite biomaterial composed of carbon fi bers and polisulfone. The observation period was 1, 2, 3, 4, 6, 8, 24 and 38 weeks. In the morphometric evaluations the breadth, curve width, fullness factor and mean grey level of carbon fibers were assessed. Results. The results showed that carbon fi bers undergo progressively degradation in animal environment. The width gradually decreased. The mean grey level in the fi rst three weeks decreased, but in the next period it increased. Conclusion. The carbon fibers of segmental tracheal prosthesis undergo gradually degradation process in biological environment expressed by decreasing of their dimensions connected with the lost of irregularities and changes of structure density.
Authors and Affiliations
Wojciech Ścierski, Grzegorz Namysłowski, Jerzy Nożyński, Lucyna Turecka, Maciej Misiołek, Eugeniusz Czecior, Grażyna Lisowska, Katarzyna Mrówka-Kata
Analysis of histopathological evaluation of pathological Iesions removed by endoscopic surgery of the nose and paranasal sinuses in the own material
SUMMARY Introduction: The work aimed at evaluating results of histopathological examination of postoperative material in endoscopic paranasal sinus surgery in the own material. Materia! and methods: The analysis covered...
Tracheotomia metodą ,,starplasty’’ u dzieci, w materiale Kliniki Otolaryngologii Dziecięcej Katedry Otolaryngologii w Poznaniu
Introduction: Obvious anatomical differences between larynx and trachea of the adult and the child necessitate different surgical techniques. The ‘‘starplasty’’ technique of pediatric tracheotomy was introduced in 1998 a...
Current indications for cochlear implantation in adults and children
Introduction: Surgical treatment of deafness by cochlear implants is used for more than 40 years, and during this period permanently, gradual and significant expansion of indications for this surgery has been observed. M...
Craniofacial resection for tumors of paranasal sinuses involving the anterior skull base
SUMMARY Introduction: Craniofacial resection is a treatment of choice for paranasal malignant and benign tumors invading the skuli base. The aim of th study: In this article the authors present the experience in craniofa...
Anatomia i dostępy chirurgiczne do przestrzeni przygardłowej
SUMMARY Purpose: Analysis of surgical approaches to primary tumors localized in parapharyngeal space used in Head & Neck Cancer Department, Cancer Center Institute in Warsaw. Description of differences in termino...