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Histomorphometric, ultrastructural and microhardness evaluation of the osseointegration of a nanostructured titanium oxide coating by metal-organic chemical vapour deposition: an in vivo study

Paper ID Volume ID Publish Year Pages File Format Full-Text
12672 809 2004 9 PDF Available
Title
Histomorphometric, ultrastructural and microhardness evaluation of the osseointegration of a nanostructured titanium oxide coating by metal-organic chemical vapour deposition: an in vivo study
Abstract

Over the past decade the increase of elderly population has determined a rise in the incidence of bone fractures, and the improvement of the implant–bone interface remains an open problem. Metal-organic chemical vapour deposition (MOCVD) has recently been proposed as a technique to coat orthopaedic and dental prostheses with metal nanostructured oxide films either through the decomposition of oxygenated compounds (single-source precursors) or the reaction of oxygen-free metal compounds with oxygenating agents. The present study was performed to assess the in vivo biocompatibility of commercially pure Ti (control material: TI/MA) implants (∅ 2 mm×5 mm length) coated with nanostructured TiO2 films by MOCVD (Ti/MOCVD) and then inserted into rabbit femoral cortical (middhiaphysis) and cancellous (distal epiphysis) bone. Histomorphometric, ultrastructural and microhardness investigations were carried out. Four and 12 weeks after surgery, significant (p<0.0005) increases in AI of Ti/MOCVD implants were observed as compared to Ti/MA implants (distal femoral epiphysis: 4 weeks=8.2%, ns; 12 weeks=52.3%, p<0.005; femoral diaphysis: 4 weeks=20.2%, p<0.0005; 12 weeks=10.7%, p<0.005). Bone microhardness results showed significant increases for the Ti/MOCVD versus Ti/MA implants at 200 μm in the femoral diaphysis (4 weeks=14.2, p<0.005) and distal femoral epiphysis (12 weeks=14.5, p<0.01) at 4 and 12 weeks, respectively. In conclusion, the current findings demonstrate that the nanostructured TiO2 coating positively affects the osseointegration rate of commercially pure Ti implants and the bone mineralization at the bone–biomaterial interface in both cortical and cancellous bone.

Keywords
Titanium oxide; Metal surface treatment; Osseointegration; Histomorphometry; Scanning electron microscopy (SEM); Mechanical properties
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Histomorphometric, ultrastructural and microhardness evaluation of the osseointegration of a nanostructured titanium oxide coating by metal-organic chemical vapour deposition: an in vivo study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 25, November 2004, Pages 5583–5591
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us