Ex vivo alendronate localization at the mesoporous titania implant/bone interface
Artikel i vetenskaplig tidskrift, 2015

An attractive approach in implant technology is local drug delivery, and design of efficient, safe and reliable treatments. Our hitherto strategy has been to coat Ti implants with a thin mesoporous TiO2 film that in turn is loaded with an osteoporosis drug, such as Alendronate (ALN) that is known to suppress osteoclastic activity. This system has proven highly successful and results in excellent osseointegration. However, more detailed information about drug-release and distribution at the bone/implant interface is needed. In this study, (14)C-ALN loaded titanium implants were placed up to 8 weeks into rat tibia and the spatial-temporal distribution of the drug was evaluated. Autoradiography data demonstrated a sustained release of (14)C-ALN and the released drug remained bound to bone in close vicinity, within 500 micrometers, of the implants. Liquid scintillation counting experiments confirmed that the distal transport of released (14)C-ALN was extremely low. The results are favorable as they show that ALN stays for a long time in the vicinity of the implant and may therefore improve for a long time the mechanical fixation of bone anchored implants. Moreover, these findings suggest due to the low systemic spreading a minimal risk of Alendronate related systemic side effects.


drug delivery





Johan Karlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Necati Harmankaya

Göteborgs universitet

Stefan Allard

Chalmers, Kemi och kemiteknik, Energi och material

Anders Palmquist

Göteborgs universitet

Mats Halvarsson

Chalmers, Teknisk fysik, Materialens mikrostruktur

Pentti Tengvall

Göteborgs universitet

Martin Andersson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Journal of Materials Science: Materials in Medicine

0957-4530 (ISSN) 1573-4838 (eISSN)

Vol. 26 1 article number 11-8







Mer information

Senast uppdaterat