Corrosion response of surface engineered titanium alloys damaged by prior abrasion

Komotori, Jun; Lee, B.J; Dong, Hanshan; Dearnley, P. A.

doi:10.1016/s0043-1648(01)00753-0

Cited by 78 publications

(41 citation statements)

References 23 publications

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“…al. 2014;Hanawa et al 1999;Niinomi, 2003;Pilliar, 2003 Komotori et al 2001;Dearnley, 2005;Güleryüz and Cimenoğlu 2004;Ross and Webster 2013). Titanyum implantlarında yüzeyin pürüzlülüğünü ve osseointegrasyonu artırmak için değişik asit ve alkali kullanılarak yüzey modifikasyonu uzun yıllardır yapılmaktadır.…”

Section: Introductionunclassified

Surface Modification of Pure Titanium Implant Using Acid and Alkali Treatments

Ünal¹,

Özçatal²,

Taktak³

et al. 2015

AKU-J. Sci. Eng.

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ÖzetMevcut çalışmada, ticari saf titanyum numuneler biyouyumluluk açısından önem arz eden yüzey pürüzlülüğünün sıvı temas açısı üzerine etkisini incelemek için değişik asit ve alkali çözeltilerine maruz bırakılmıştır. Bu amaçla, titanyum yüzeyi 6 farklı asit ve alkali çözeltileri ile uzun süreli dağlanmıştır. Yüzeyler mekanik profilometre, sıvı temas açısı ölçüm cihazı ve taramalı elektron mikroskobu (SEM) ile incelenmiştir. Çalışma sonucunda, titanyum implant yüzeyindeki pürüzlülük değerinin artışı ile sıvı temas açısının arttığı görülmüştür. Orijinal numune ile mukayese edildiğinde, 1K, 2K ve 3K kodlu numunelerde yüzey pürüzlülüğü ve sıvı temas açısı düşmüş, 4K, 5K ve 6K kodlu numunelerde ise artma eğilimi göstermiştir. Bu durum ilk 3 kimyasal işlemin titanyum yüzeyinde hidrofilik bir özellik oluşturduğunun göstergesidir. Surface Modification of Pure Titanium Implant Using Acid and Alkali TreatmentsKeywords "Pure titanium";"Implant";"Chemical modification"; "Liquid contact angle" AbstractIn the present study, commercial pure titanium (Cp-Ti) samples were subjected to various acid and alkali solutions to study the role of surface roughness, which is important in terms of biocompatibility, on liquid contact angle of implant surfaces. For this purpose, the surfaces of titanium samples were etched by mixtures of acid and alkali for long duration. The surfaces of treated samples were characterized using mechanical profilometer, optical tensiometer for measurement liquid contact angle and scanning electron microscopy. In the results, it was observed that the contact angle of titanium implant increased with the increase in the surface roughness values on titanium surfaces. The surface roughness and liquid contact angle values of the samples with 1K, 2K and 3K codes decreased, whereas they increased for the samples with 4K, 5K and 6K codes when compared to the original titanium. This case indicated that the first three chemical treatments created hydrophilic property on titanium surfaces.

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Section: Introductionunclassified

Surface Modification of Pure Titanium Implant Using Acid and Alkali Treatments

Ünal¹,

Özçatal²,

Taktak³

et al. 2015

AKU-J. Sci. Eng.

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“…Surface treatments, e.g., thermal oxidation [18][19][20] and anodization, 21) had been performed with results showing improvement of characteristics of oxide layer. Unfortunately, some drawbacks are with these surface treatment methods.…”

Section: Introductionmentioning

confidence: 99%

Effect of O<SUB>2</SUB>-Plasma Treatment on Surface Characteristics and Osteoblast-Like MG-63 Cells Response of Ti-30Nb-1Fe-1Hf Alloy

et al. 2009

Mater. Trans.

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In this study, the effect of O 2 -plasma treatment with various powers on the surface characteristics and also the cell response of the Ti30Nb-1Fe-1Hf alloy were investigated. Surface characteristics of Ti-30Nb-1Fe-1Hf alloy were evaluated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray powder diffractometer (XRPD) and wettability test. The results show that the surface roughness of the alloy decreases after O 2 -plasma treatment, and also with increased plasma power. By XPS analyses, both Ti valence states of Ti 2þ , Ti 3þ and Ti 4þ as well as Nb valence states of Nb 2þ , Nb 4þ and Nb 5þ can be detected in the oxide films. Also, the concentrations of TiO 2 and Nb 2 O 5 increase with increasing O 2 -plasma power. The results also show that the contact angle decreases as the alloy is modified by O 2 -plasma treatment, and therefore, the treated alloys can be expected to be more hydrophilic. On the other hand, for the evaluation of cell response, cell (MG-63) culture was performed. The results show that the oxidation effect on the alloy surface brought about by O 2 -plasma treatment enhances the spreading of cells. In addition, in vitro tests suggest that cell spreading on Ti-30Nb-1Fe-1Hf alloy is similar to that on Ti-6Al-4V alloy, whereas, cell adhesion on Ti-30Nb-1Fe-1Hf alloy is better than that on Ti-6Al-4V alloy.

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“…Ti-6Al-4V is a common alloy for ACPs, and is also used in other orthopedic devices such as hip implants, bone plates, and dental implants (Komotori, Lee, Dong, & Dearnley, 2001;Vadiraj & Kamaraj, 2007;Deanrley, Dahm, & Cimenoglu, 2004). Its high strength-to-weight ratio and biocompatibility are effective in the ACP application, where loading and repeated wear are minimal and osseointegration, or the growth of bone cells, is not desirable.…”

Section: Base Metal Corrosion Resistancementioning

confidence: 99%

“…Surface modifications depend on the application, the purpose of the implant, and the state of the Ti-6Al-4V surface upon which they form. Nitrided samples were compared to thermally oxidized Ti-6Al-4V samples by Komotori et al(2001). The open circuit potential (E OC ), or potential of an immersed sample in equilibrium, of thermally oxidized samples was more consistent and reproducible, unlike the scattered E OC values obtained for TiN treatments.…”

Section: Base Metal Corrosion Resistancementioning

confidence: 99%

“…The nitride surface layer microfragmented during wear tests, creating more abrasive wear with the resulting nitride fragments. Komotori et al(2001) also compared the hardness of nitrided Ti-6Al-4V samples to thermally oxidized Ti-6Al-4V samples. The surface roughness was greater for the TiN samples due to the large defects created by the nitriding process, but the two treatments had similar hardness values.…”

Section: Comparison Of Surface Treatments Using Repassivation and Primentioning

confidence: 99%

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Effectiveness of Thermal Oxidation in Relation to Anterior Cervical Plates

Miyashiro¹

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EFFECTIVENESSS OF THERMAL OXIDATION IN RELATION TO ANTERIOR CERVICAL PLATESKatherine A. MiyashiroTi-6Al-4V anterior cervical plates (ACP) are used in spinal fusion surgeries to fixate cervical vertebrae during graft adhesion. However, documented cases of implant failure and the potential for ACP corrosion raise concerns regarding any degradation of material resulting from extended implantation. In addition, abrasion during implantation may damage a section of the protective oxide layer, potentially exposing surrounding tissues to the harmful effects of bare titanium, aluminum, and vanadium. Thermal oxidation has been shown to improve corrosion-resistance and wear-resistance, depending on temperature and time. To quantify the attributes of the thermally grown oxide layer, Ti-6Al-4V coupons underwent thermal oxidation treatments in an atmosphere environment at 600 and 675 ˚C for 1, 4, 8, and 16 hours. Two sample types were produced: non-abraded and abraded.Non-abraded samples underwent potentiodynamic polarization according to ASTM F2129, which included open circuit potential tests. Open circuit potentials (E OC ) increased with increasing treatment time, indicating that longer treatment time resulted in thicker oxides. All samples treated at 675˚C displayed higher E OC than samples treated at 600˚C, indicating an increase in oxide thickness with higher temperature. During the first hour of treatment at 675˚C, the rate of oxide growth was greater than the rate of oxide growth of all samples treated at 600˚C. Samples treated at 600˚C for 4 and 8 hours displayed pitting during potentiodynamic polarization, but all other samples withstood the applied potentials and surfaces were further passivated.To simulate damage during surgery, a single abrasion was made across samples in the abraded group with a diamond-tip indenter under a load of 471g at 4.4 mm/s. Abraded samples were v subjected to potential-step tests to assess repassivation ability after abrasion. All samples displayed repassivation ability, except for the sample treated at 600˚C for 4 hours.Surface roughness was measured with atomic force microscopy before and after thermal oxidation treatments. Lower surface roughness was desired to discourage osseointegration, or the growth of bone cells. No isothermal surface roughness trends were observed, as high surface roughness outliers were seen in samples treated at 675˚C for 8 hours and 600˚C for 4 hours.Rockwell hardness and Vickers microhardness were also measured to assess bulk changes in mechanical properties and hardness of the oxidized surfaces. No statistical change was seen in Rockwell hardness. Vickers hardness increased with increasing temperature and time, with the exception of the sample treated at 600˚C for 4 hours. Metallography of the thermally oxidized samples was analyzed to determine if a change in microstructure had occurred due to thermal processing. No major change in grain size or the amount of alpha and beta grains was seen in samples treated at 600˚C, but samples treated for exte...

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Corrosion response of surface engineered titanium alloys damaged by prior abrasion

Cited by 78 publications

References 23 publications

Surface Modification of Pure Titanium Implant Using Acid and Alkali Treatments

Surface Modification of Pure Titanium Implant Using Acid and Alkali Treatments

Effect of O<SUB>2</SUB>-Plasma Treatment on Surface Characteristics and Osteoblast-Like MG-63 Cells Response of Ti-30Nb-1Fe-1Hf Alloy

Effectiveness of Thermal Oxidation in Relation to Anterior Cervical Plates

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