Histological evaluation of novel ossicular chain replacement prostheses: an animal study in rabbits.

Abstract:

CONCLUSION:The improved biocompatibility of Bioverit II coated with a nanostructured surface shows promising qualities for use in human reconstructive middle ear surgery. In the case of chitosan-hydroxyapatite composite prostheses, further investigations regarding composition of the material, degree of purity and design are necessary before clinical application. OBJECTIVE:The selection of optimal materials for reconstructive middle ear surgery continues to be a problem. In the present study novel materials were tested as total ossicular replacement prostheses (TORPs) in an animal model. MATERIALS AND METHODS:Bioverit II coated with a nanostructured surface and chitosan-hydroxyapatite composites were placed in the middle ear of 40 rabbits. Uncoated Bioverit II was used as control. After an implantation period of 28, 84 or 300 days petrous bones were extracted, embedded in epoxy resin and examined by light microscopy. RESULTS:Uncoated and coated Bioverit prostheses revealed a mucosal coverage and a little osseogenic response after 28 days. The results of the coated Bioverit prostheses slightly surpassed those of the plain prostheses. Chitosan-hydroxyapatite composite prostheses were mostly found to be dislocated after 28 days. Formations of granulation tissue and fibrotic capsules were observed around these implants. This reaction could be caused by the instability of the composite material or may be due to impurities present in the chitosan.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Turck C,Brandes G,Krueger I,Behrens P,Mojallal H,Lenarz T,Stieve M

doi

10.1080/00016480601053032

subject

Has Abstract

pub_date

2007-08-01 00:00:00

pages

801-8

issue

8

eissn

0001-6489

issn

1651-2251

pii

772810865

journal_volume

127

pub_type

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