The corrosion resistance of pure titanium in organic acids

Koike, Mari; Fujii, Hiroyuki

doi:10.1016/s0142-9612(01)00040-0

Cited by 118 publications

(97 citation statements)

References 12 publications

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“…Solutions simulating the biological conditions include 0.9% NaCl solution, phosphate-buffered saline (PBS (-)), and artificial saliva [7][8][9][10] . Yoneyama et al 11) pointed out that 0.9% NaCl solution reproduced the body fluid to some extent, but lacked quantitative properties, particularly, reliability of the released Ti ion level, and 1.0% lactic acid solution was suitable.…”

Section: Introductionmentioning

confidence: 99%

Study of corrosion of combinations of titanium/Ti-6Al-4V implants and dental alloys

Yamazoe

2010

Dental Materials Journal

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Metal ions released in 1% lactic acid solution from combinations of titanium fixtures with superstructures made of dental precious metal alloys (dental alloys) and titanium and differences based on the fixing method were investigated. In combinations of titanium with dental alloys, the level of Ti release was influenced by micro-structure of titanium: it was lower when the grain size was smaller. In titanium-titanium combinations, differences in the micro-structure of metal also markedly influenced the dissolution: the level of release increased when the micro-structure of titanium was different. The Ti and V release levels were higher in combination with titanium alloy and titanium than with titanium alloy and dental alloys. Regarding the superstructure-fixture fixing method, the level of Ti release was significantly lower in cement than in direct fixation.

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Section: Introductionmentioning

confidence: 99%

Study of corrosion of combinations of titanium/Ti-6Al-4V implants and dental alloys

Yamazoe

2010

Dental Materials Journal

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“…Ti) has established a reputation of low density, high corrosion resistance and excellent biocompatibility for dental prosthetic applications including crown and bridge, partial framework, dental implant, etc. [1][2][3] Though titanium is highly reactive with both oxygen and molding materials at high temperatures, further developments in casting machines and molding materials have been proven to be capable of assuring the clinical use of titanium dental castings. [4][5][6] Despite its many good properties, some disadvantages (especially relatively low strength) of cast pure titanium have often been criticized to be insufficient for certain dental applications such as long-spanned fixed prostheses and the frameworks of removable partial dentures (RPD).…”

Section: Introductionmentioning

confidence: 99%

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Lin

2004

Mater. Trans.

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The present study compares castability and mechanical performance among alloys of c.p. Ti, Ti-6Al-7Nb and a newly-developed Ti-15Mo-1Bi in regard to their as-cast state. Experimental results indicate that average cast length of Ti-6Al-7Nb appears a little lower than c.p. Ti and Ti-15Mo-1Bi, although the differences are not significant. C.p. Ti has an hcp phase of lath-type morphology with serrated, irregular grain boundaries. Ti-6Al-7Nb is dominated by hexagonal 0 phase with acicular martensitic morphology. In particular, Ti-15Mo-1Bi is comprised of equiaxed, metastable bcc phase. The hardened layer thicknesses of three materials are similar. Ti-15Mo-1Bi has the highest surface microvickers hardness, while c.p. Ti has the lowest. The bulk hardness of c.p. Ti is much lower than the other two alloys which display similar hardness. Notably, Ti-15Mo-1Bi and Ti-6Al-7Nb have similar bending strength which is far higher than c.p. Ti. The bending modulus of Ti-15Mo-1Bi is significantly lower than c.p. Ti and Ti-6Al-7Nb. Ti-15Mo-1Bi also shows a much larger elastic recovery angle than two other materials. Tensile test indicates that Ti-15Mo-1Bi has a similar UTS but much higher YS and elongation along with much lower tensile modulus compared to Ti-6Al-7Nb.

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“…Okazaki et al reported that the amount of dis solved titanium ions in a lactic acid solution was greater than that in saline and artificial saliva. 12 Koike et al 14 and Kurogi et al 16 found that the quantity of titanium eluted after immersion in lactic acid was 0.38 ppm/cm 2 , and in formic acid was 0.009 ppm/cm 2 (128 mmol solutions, 37°C, im mersion time 3 weeks). The concentration of the lactic acid solution used in these previous studies was the same as that in the solution that we used in the present study as control (LA), and the quan tity of titanium eluted was also the same.…”

Section: Discussionmentioning

confidence: 99%

“…Further, a number of in-vitro studies have confirmed elution of titanium in immersion experiments, [10][11][12][13] while others have revealed that titanium dissolves in some organic acid solutions, with different types of reactions. [14][15][16] Dental restorations usually come into contact with whole saliva, which contains various substances, such as plaque constituents, gingival crevice fluid, exfoliative gingival epithelial cells, protein, microorganisms, and organic acids. 17 The concentrations of each of these substances varying depending on various factors.…”

Section: Introductionmentioning

confidence: 99%

Ion Release from Casts of Commercially Pure Titanium in Mixed Solutions of Organic Acids Contained in Human Saliva

Hirayama

Koike

Kurogi

et al. 2008

J Jpn Prosthodont Soc

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Ions released from metals are an issue in regard to their biocompatibility. We immersed titanium in mixed solutions of organic acids contained in human saliva. The results suggest that titanium elutes in the oral cavity, and that it is, therefore, necessary to consider the possibility of allergic reactions to titanium. AbstractPurpose: The purpose of this study was to investigate the ion release from titanium casts in solutions of mixed organic acids and to reconsider the possibility of allergic reactions to titanium.Methods: Cast specimens were made from commercially pure titanium. For the immersion solutions, we prepared two types of organic acid solutions, one mixed with organic acids contained in whole stimulated saliva at two different dilutions, and the other, a lactic acid solution. Following immersion, the amounts of dissolved titanium ions, weight loss of the casts, and micrographs of the specimen surfaces were examined.Results: There were significantly larger amounts of dissolved titanium ions in the mixed organic acid solutions than in the lactic acid solution. There was also a significant difference in the weight loss values between the immersion solutions (p < 0.0001), but the significance level was different from that of the difference in the quantity of ion elution. Conclusion:The results suggested that a much larger quantity of ions is released from titanium casts attached in the oral cavity than has been reported previously, and that it is necessary to consider the possibility of allergic reactions to titanium casts.

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The corrosion resistance of pure titanium in organic acids

Cited by 118 publications

References 12 publications

Study of corrosion of combinations of titanium/Ti-6Al-4V implants and dental alloys

Study of corrosion of combinations of titanium/Ti-6Al-4V implants and dental alloys

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Ion Release from Casts of Commercially Pure Titanium in Mixed Solutions of Organic Acids Contained in Human Saliva

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