Effect of UV irradiation on the surface Gibbs energy of Ti6Al4V and thermally oxidized Ti6Al4V

Pacha-Olivenza, Miguel A.; Gallardo-Moreno, Amparo M.; Méndez-Vilas, A.; Bruque, J.M.; González-Carrasco, José Luis; González-Martı́n, M.L.

doi:10.1016/j.jcis.2007.11.060

Cited by 27 publications

(38 citation statements)

References 22 publications

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“…The changes observed in the Ti6Al4V surface after UV irradiation have already been discussed in a recent study by our group [8]. Table 1 exhibits those important changes in h W and h F , the polar liquids, before and after irradiation (P < 0.05).…”

Section: Resultssupporting

confidence: 63%

“…A second set of samples was exposed to an UV source for 15 h. This period was sufficient to guarantee a complete hydrophilization of the surface, as we have recently shown [8]. G15-T8 UV lamps were kindly provided by Philips (Philips Iberica, Spain).…”

Section: Ti6al4vmentioning

confidence: 99%

“…The spontaneous passivation of this alloy forms a thin outer layer, predominantly composed of amorphous or poorly recrystallized TiO 2 . We have recently shown that the presence of TiO 2 changes the physico-chemical surface properties of Ti6Al4V after UV irradiation [8]. Interestingly, titanium, TiO 2 surfaces and anodized titanium alloy with a thin film of anatase show anti-bacterial properties under UV treatment [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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In vitro biocompatibility and bacterial adhesion of physico-chemically modified Ti6Al4V surface by means of UV irradiation

et al. 2009

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Section: Resultssupporting

confidence: 63%

Section: Ti6al4vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In vitro biocompatibility and bacterial adhesion of physico-chemically modified Ti6Al4V surface by means of UV irradiation

et al. 2009

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“…The cleaning procedures have been based on previous bibliographic information and our own experience [14,18,19]. The first set of experiments was done by cleaning the samples as described in Protocol #0.…”

Section: Resultsmentioning

confidence: 99%

“…Bibliography shows water contact angle values ranging from about 80º to 40º [13,14]. In addition, it is difficult to understand how a specific surface treatment changes the wettability of Ti6Al4 since different authors provide different information for the same surface modification.…”

Section: Introductionmentioning

confidence: 99%

Experimental approach towards the water contact angle value on the biomaterial alloy Ti6Al4V

Hierro-Oliva

Gallardo-Moreno

Rodríguez-Cano

et al. 2015

Annales UMCS, Chemia

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In the biomedical field, water contact angle is a useful gauge to follow how a biomaterial surface would interact with the surrounding water-like physiological environment. Ti6Al4V alloy is widely used in orthopedic applications. Nevertheless, the values of its water contact angle reported in the literature show a large dispersion, from 40° up 80°. However, in addition to the expected dependence of the surface wettability on preliminary treatments, the values of the water contact angle on the pristine Ti6Al4V alloy suffers from an important variability and lack of reproducibility. The present research pays attention to this difficulty and proposes a simple experimental procedure to ensure adequate contact angle reproducibility. Controlled passivation growth in mild underwater conditions of freshly polished disks, followed by ultrasonic washing, avoiding the rubbing of the surface, gives average water contact angles of 80° with very low standard deviations also among samples from the same batch.

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EPA covalently bound to smooth titanium surfaces decreases viability and biofilm formation of Staphylococcus epidermidis in vitro

Petzold¹,

Gomez‐Florit²,

Lyngstadaas³

et al. 2012

Journal Orthopaedic Research

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Colonization of implant surfaces with bacteria should ideally be prevented right from implantation, as bacteria attaching to the surface will form a biofilm, being then well protected against antibiotic treatment. Therefore, implant coatings should combine antibacterial properties with biocompatibility towards their host tissue. We tested a UV-induced covalent coating procedure with eicosapentaenoic acid (EPA) for smooth titanium (Ti) surfaces for its ability to prevent attachment and proliferation of Staphylococcus epidermidis and to allow mineralization of MC3T3-E1 osteoblasts. Bacterial initial attachment was highest for EPA-coated surfaces, but was reduced by vigorous washing, possibly due to low adhesive strength on those surfaces. We found an increase in the ratio of dead bacteria and in overall biofilm after 16 h on Ti surfaces with covalently bound EPA compared to Ti. The UV-induced EPA coating did not impair the ability of MC3T3-E1 preosteoblasts to mineralize, while a reduction in mineralization could be found for UV-irradiated Ti surfaces and UV-irradiated surfaces washed with ethanol compared to Ti. Although in vivo studies are needed to evaluate the clinical significance, our results indicate that covalent coating of Ti surfaces with EPA by UV irradiation decreases the survival of S. epidermidis and maintains the mineralization ability of osteoblasts. ß

show abstract

Effect of UV irradiation on the surface Gibbs energy of Ti6Al4V and thermally oxidized Ti6Al4V

Cited by 27 publications

References 22 publications

In vitro biocompatibility and bacterial adhesion of physico-chemically modified Ti6Al4V surface by means of UV irradiation

In vitro biocompatibility and bacterial adhesion of physico-chemically modified Ti6Al4V surface by means of UV irradiation

Experimental approach towards the water contact angle value on the biomaterial alloy Ti6Al4V

EPA covalently bound to smooth titanium surfaces decreases viability and biofilm formation of Staphylococcus epidermidis in vitro

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