Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/55596
Title: BS-SEM evaluation of the tisular interactions between cortical bone and calcium-phosphate covered titanium implants
Author: Manzanares Céspedes, María Cristina
Franch, Jordi
Carvalho Lobato, Patricia
Belmonte, A. M.
Tusell, J.
Franch, B.
Fernández, J. M.
Clèries, L.
Morenza Gil, José Luis
Keywords: Teixit ossi
Tíbia
Ossificació
Calci
Ablació amb làser
Titani
Gos
Bone
Tibia
Ossification
Calcium
Laser ablation
Titanium
Dog
Issue Date: 2001
Publisher: Groupement International pour la Recherche Scientifique en Stomatologie et Odontologie
Abstract: The improvement of the reliability of the contact between the osseous tissues and the implant materials has been tested by recovering the metallic implants with ceramic materials, usually calcium phosphates. In our study, the calcium phosphate recovering layers were deposited by means of a pulsed-laser deposition technique. Our aim was to to evaluate the tissue interactions established between cortical bone and titanium implants covered by five different layers, ranging from amorphous calcium phosphate to crystalline hydroxyapatite, obtained by altering the parameters of the laser ablation process. The surgical protocol of the study consisted in the simultaneous implantation of the five types of implants in both the tibial dyaphisis of three Beagle dogs, sacrificed respectively one, two and three months after the last surgical procedures. After the sacrifice, the samples were submitted to a scheduled procedure of embedding in plastic polymers without prior decalcification, in order to perform the ultrastructural studies: scanning microscopy with secondary and backscattered electrons (BS-SEM). Our observations show that both in terms of the calcified tissues appearing as a response to the presence of the different coatings and of time of recovering, the implants coated with crystalline calcium phosphate layers by laser ablation present a better result than the amorphous-calcium-phosphate-coated implants. Moreover, the constant presence of chondroid tissue, related with the mechanical induction by forces applied on the recovering area, strongly suggests that the mechanisms implied in osteointegration are related to endomembranous, rather than endochondral ossification processes
Note: Reproducció del document publicat a: http://www.girso.eu/journal/index.php/girso/issue/archive
It is part of: Bulletin du GIRSO, 2001, vol. 43, num. 3, p. 100-108
URI: http://hdl.handle.net/2445/55596
ISSN: 0250-4693
Appears in Collections:Articles publicats en revistes (Física Aplicada)
Articles publicats en revistes (Patologia i Terapèutica Experimental)
Articles publicats en revistes (Fonaments Clínics)

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