Surface characteristics and bioactivity of oxide films formed by anodic spark oxidation on titanium in different electrolytes

Song, Ho‐Jun; Park, Seong-Hwan; Jeong, Sang‐Hun; Park, Yeong-Joon

doi:10.1016/j.jmatprotec.2008.02.055

Cited by 109 publications

(68 citation statements)

References 29 publications

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“…A change in any of these variables can affect the surface morphology, chemical composition and film thickness of the titanium implant. 28 The thick oxide film formed during anodic oxidation at higher applied voltages leads to a high surface roughness, which provides a high bonding strength between the oxide and the titanium substrate. Moreover, the surface hardness is improved near the oxide layer due to anodic oxidation, which is caused by the incorporation of the oxide into the titanium alloy.…”

Section: Anodizingmentioning

confidence: 99%

A review of the surface modifications of titanium alloys for biomedical applications

Manjaiah¹,

Laubscher²

2017

Mater. tehnol.

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Dental implants are mechanical components that are used to restore the mastication (chewing) function and/or aesthetic appeal because of tooth loss or degradation. They are affixed (screwed) into the upper or lower jaw and act as a base for single or bridge-type tooth replacements. They are mostly manufactured from titanium alloys. The surface integrity of the manufactured implant may have a significant effect on the functioning and success of the implant. A systematic review is described on the effect of engineered surface integrity on the performance of titanium dental implants as regards the implant fixation, mechanical performance, bone growth and cell response. The need for surface engineering of the implant is introduced first. This includes the mechanical, surface-integrity and biocompatibility-required properties. This is followed by introducing and discussing the dedicated surface-modification processes currently employed. These include: abrasive blasting, electrochemical processes, hybrid processes and laser modification. The mechanical and biocompatible properties of an implant are the most crucial factor for their application in biomedical use. Hence, the present review article focused on the latest improvements to dental implant design based on the mechanical and biocompatible properties. The physical contact of an implant with respect to its surface roughness is an important factor in dental implant design. The surface roughness of an implant on the macro, micro and nano scales have specific effects on the implant's contact with the surrounding tissue of the bone. In addition, the biocompitability of titanium material is very important to develop a sustainable dental implant. Looking into the importance of the above mechanical and biocompatible properties of bone implants, the authors review elaborately the development of titanium-based implants with reference to the above properties. Keywords: implants, titanium, surface roughness, systematic review, surface engineering process, hybrid process, mechanical machining, chemical treatment Zobni vsadki so mehanske komponente, ki se jih uporablja za obnovo funkcije`ve~enja in/ali iz estetskih razlogov zaradi izgube ali poslab{anja zoba. Pritrjeni (privija~eni) so v zgornjo ali v spodnjo~eljust in slu`ijo kot osnova za nadomestni zob ali za mosti~ek. Ve~inoma so izdelani iz titanovih zlitin. Integriteta povr{ine izdelanih vsadkov lahko pomembno vpliva na delovanje in uspe{nost vsadka. Opisan je sistemati~en pregled o vplivu in`enirske celovitosti povr{ine na zmogljivost titanovega dentalnega vsadka glede na pritrditev vsadka, mehanske zmogljivosti, vra{~anja kosti in odziva celic. Najprej je predstavljena potreba po obdelavi povr{ine vsadka. To vklju~uje zahtevane mehanske lastnosti, celovitost povr{ine in biokompatibilnost. Temu sledi predstavitev in razlaga trenutno uporabljanih postopkov za namensko spremembo povr{ine. To vklju~uje: abrazivno peskanje, elektrokemijske procese, hibridne procese in modifikacijo z laserjem. Mehanske in biokompatibilne la...

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Section: Anodizingmentioning

confidence: 99%

A review of the surface modifications of titanium alloys for biomedical applications

Manjaiah¹,

Laubscher²

2017

Mater. tehnol.

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“…17 The literature review indicates that there are no comprehensive works devoted to a possible change of properties during medical sterilization. [18][19][20] Therefore, the authors of this paper focused on an assessment of the possible changes to the mechanical and electrochemical properties of a coating subjected to pressurized steam sterilization and ethylene oxide sterilization. The tests on the samples following medical sterilization processes have shown differences in relation to those samples that did not undergo sterilization.…”

Section: Discussionmentioning

confidence: 99%

The effect of EO and steam sterilization on the mechanical and electrochemical properties of titanium Grade 4

Basiaga¹,

Walke²,

Paszenda³

et al. 2016

Mater. Tehnol.

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Currently, various modifications to surfaces are made more and more frequently in order to improve implants' haemocompatibility. The main criterion determining the applicability of the respective surface-modification method is obtaining a product featuring suitable functional properties. These properties depend to a great extent on the corrosion resistance in the environment of human blood. Subject-matter literature does not devote much attention to the sterilisation process for titanium and cpTi alloys with surface modifications. A problem that still remains unsolved is the selection of a proper test showing the full characteristics of their behaviour contact with a blood environment during the time that the implant is used. Therefore, the authors of this study made an attempt to evaluate the impact of medical sterilisation methods, i.e., the ethylene oxide anodic oxide and SiO2 layer, by means of the sol-gel method. The efficiency of the suggested technology for oxide layer application was evaluated on the basis of mechanical and electrochemical tests. Sterilisation in ethylene oxide and steam had a favourable influence on the electrochemical and mechanical properties of cpTi, irrespective of the method of surface preparation. In order to simulate real conditions, the tests were performed in artificial plasma at a temperature of T = 37 ± 1°C and pH = 7.0 ± 0.2. The results proved the diversification of electrochemical properties of the oxide layers, depending on the technological parameters of its application. The suggestion of proper variants of the surface modification with the application of electrochemical and chemical methods is of long-range importance and will contribute to the development of technological conditions with specific parameters for the creation of oxide layers on metallic implants made of cpTi. Keywords: cpTi (Grade 4), SiO 2 , TiO 2 , mechanical properties, electrochemical properties Vedno pogosteje se opravljajo razli~ne modifikacije povr{ine, da bi se izbolj{ala hemokompatibilnost vsadkov. Glavni kriterij, ki dolo~a uporabnost metode za modifikacijo povr{ine je, da proizvod poka`e primerne funkcionalne lastnosti. Te lastnosti so v veliki meri odvisne od korozijske odpornosti v~love{ki krvi. Obstoje~a literatura ne posve~a velike pozornosti postopku sterilizacije titana in cpTi zlitin z modificirano povr{ino. Problem, ki {e ni re{en, je izbira primernega preizkusa, ki bi pokazal vse zna~ilnosti o obna{anju stika s krvjo med uporabo vsadka. Zato so avtorji v tej {tudiji poizkusili oceniti vpliv medicinskih metod sterilizacije, kot je etilen oksid anodni oksid in SiO2 plast izdelano s pomo~jo metode sol-gel. Predlagana tehnologija uporabe oksidnega sloja je bila ocenjena z mehanskimi in elektrokemijskimi preizkusi. Sterilizacija v etilen oksidu in pari je imela ugodne vplive na elektrokemijske in mehanske lastnosti cpTi, ne glede na na~in priprave povr{ine. Za simulacijo realnih pogojev so bili preizkusi izvr{eni v umetni plazmi pri temperaturi T = 37 ± 1°C in pH = 7,0 ± 0,2. Dobljeni rezu...

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“…When V increases, i also increases up to a maximum, indicating the formation of the TiO2 barrier layer; then, i rapidly decreases because the oxide increases its electrical resistance. When the voltage was established on 40 V, i became gradually stable due to the equilibrium between the oxide growth and dissolution rates [9,14,18]. The reduction of the oxide growth rate was probably due to titanium or oxygen diffusion through the coating becoming the controlling step.…”

Section: Coatings Characterizationmentioning

confidence: 99%

Influence of the Electrolyte Concentration on the Smooth TiO2 Anodic Coatings on Ti-6Al-4V

Vera¹,

Colaccio²,

Rosenberger³

et al. 2017

Preprint

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To obtain smooth TiO2 coatings for building a new design of Ti-6Al-4V heart valve, the anodic oxidation technique in pre-spark conditions was evaluated. TiO2 coating is necessary for its recognized biocompatibility and corrosion resistance. A required feature on surfaces in contact with blood is a low level of roughness (Ra ≤ 50 nm) that does not favor the formation of blood clots. The present paper compares the coatings obtained by anodic oxidation of the Ti-6Al-4V alloy using H2SO4 at different concentrations (0.1-4 M) as electrolyte and applying different voltages (from 20 to 70 V). Color and morphological analysis of coatings are performed using optical and scanning microscopy. The crystalline phases were analyzed by glancing X-ray diffraction. By varying the applied voltage, different interference colors coatings were obtained. The differences in morphologies of the coatings caused by changes in concentration are more evident at high voltages, limiting the oxidation conditions for the desired application. Anatase phase was detected from 70 V for 1 M H2SO4. An increase in the concentration of H2SO4 decreases the voltage at which the transformation of amorphous to crystalline coatings occurs; i.e., with 4 M H2SO4, the anatase phase appears at 60 V.

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Surface characteristics and bioactivity of oxide films formed by anodic spark oxidation on titanium in different electrolytes

Cited by 109 publications

References 29 publications

A review of the surface modifications of titanium alloys for biomedical applications

A review of the surface modifications of titanium alloys for biomedical applications

The effect of EO and steam sterilization on the mechanical and electrochemical properties of titanium Grade 4

Influence of the Electrolyte Concentration on the Smooth TiO2 Anodic Coatings on Ti-6Al-4V

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