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Coatings 2011, 1(1), 53-71; doi:10.3390/coatings1010053
Article

A Modified Surface on Titanium Deposited by a Blasting Process

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Received: 16 July 2011; in revised form: 23 August 2011 / Accepted: 1 September 2011 / Published: 13 September 2011
(This article belongs to the Special Issue Advances in Medical Device Coatings)
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Abstract: Hydroxyapatite (HA) coating of hard tissue implants is widely employed for its biocompatible and osteoconductive properties as well as its improved mechanical properties. Plasma technology is the principal deposition process for coating HA on bioactive metals for this application. However, thermal decomposition of HA can occur during the plasma deposition process, resulting in coating variability in terms of purity, uniformity and crystallinity, which can lead to implant failure caused by aseptic loosening. In this study, CoBlastTM, a novel blasting process has been used to successfully modify a titanium (V) substrate with a HA treatment using a dopant/abrasive regime. The impact of a series of apatitic abrasives under the trade name MCD, was investigated to determine the effect of abrasive particle size on the surface properties of both microblast (abrasive only) and CoBlast (HA/abrasive) treatments. The resultant HA treated substrates were compared to substrates treated with abrasive only (microblasted) and an untreated Ti. The HA powder, apatitic abrasives and the treated substrates were characterized for chemical composition, coating coverage, crystallinity and topography including surface roughness. The results show that the surface roughness of the HA blasted modification was affected by the particle size of the apatitic abrasives used. The CoBlast process did not alter the chemistry of the crystalline HA during deposition. Cell proliferation on the HA surface was also assessed, which demonstrated enhanced osteo-viability compared to the microblast and blank Ti. This study demonstrates the ability of the CoBlast process to deposit HA coatings with a range of surface properties onto Ti substrates. The ability of the CoBlast technology to offer diversity in modifying surface topography offers exciting new prospects in tailoring the properties of medical devices for applications ranging from dental to orthopedic settings.
Keywords: hydroxyapatite; grit blasting; CoBlast; hard tissue implants hydroxyapatite; grit blasting; CoBlast; hard tissue implants
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

O’Sullivan, C.; O’Hare, P.; Byrne, G.; O’Neill, L.; Ryan, K.B.; Crean, A.M. A Modified Surface on Titanium Deposited by a Blasting Process. Coatings 2011, 1, 53-71.

AMA Style

O’Sullivan C, O’Hare P, Byrne G, O’Neill L, Ryan KB, Crean AM. A Modified Surface on Titanium Deposited by a Blasting Process. Coatings. 2011; 1(1):53-71.

Chicago/Turabian Style

O’Sullivan, Caroline; O’Hare, Peter; Byrne, Greg; O’Neill, Liam; Ryan, Katie B.; Crean, Abina M. 2011. "A Modified Surface on Titanium Deposited by a Blasting Process." Coatings 1, no. 1: 53-71.


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