Elemental ion release from four different fixed prosthodontic materials

Elshahawy, Waleed; Watanabe, Ikuya; Koike, Mari

doi:10.1016/j.dental.2009.02.004

Cited by 63 publications

(43 citation statements)

References 28 publications

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“…Most of in vitro experiments confirmed that the nickel ions were released in measurable amount from Ni-containing alloys immersed the solution of artificial saliva 10,[18][19][20] . Cytotoxicity assays in vitro media further revealed that the nickel ions released had potential cytotoxic and genotoxic effects on cells, which may concentrations 3,6,7,11,[22][23][24][25][26] .…”

Section: Introductionmentioning

confidence: 91%

Urinary Nickel Ion Evaluation of Adolescents during the Initial Period of Orthodontic Fixed Treatment

Guo

Liu

Zheng

et al. 2014

J. Hard Tissue Biology.

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Biocompatibility and resistance to biodeterioration of materials has been studied using various approaches, including the analysis of various markers of exposure, both in vitro and in vivo. The possible release of trace elements during orthodontic treatment and their potential toxicity to patients have been an increasing concern. The wide range of appliances routinely used during orthodontic treatment is typically made of alloys which may contain cobalt, chromium, iron, nickel, and titanium, of which the major concern is nickel. Nickel concentrations in humans undergoing orthodontic treatment have been assessed in many investigations, although few have specifically examined urine specimens. Urinary nickel concentrations can reflect systemic levels in whole organisms, and as a non-invasive means of study, urine analysis can easily achieve the compliance of participants and guardians. In addition, the predominant metabolic route of nickel is through the kidneys. Therefore, urinary samples are seen as a good indicator for monitoring trace metals released from orthodontic appliances. According to the literature, metal ions are released only in the initial stage of the treatment. Thus, the duration of our study was limited to the first 6 months of treatment. Since urinary nickel levels of adolescents in the initial period of fixed orthodontic treatment are being investigated and reported for the first time in this paper, the aim of our study is to quantitatively evaluate urinary nickel levels and further to summarize the dynamic metabolic regularity of systemic nickel for adolescents in the initial period of fixed orthodontic treatment.

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Section: Introductionmentioning

confidence: 91%

Urinary Nickel Ion Evaluation of Adolescents during the Initial Period of Orthodontic Fixed Treatment

Guo

Liu

Zheng

et al. 2014

J. Hard Tissue Biology.

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“…A higher amount of chromium (25 wt%) would result in superior corrosion resistance, and this was associated with a more uniform distribution of Cr in the alloy microstructure 11) . Conversely, if Cr content was less than 16-20 wt%, Ni release increased under all conditions (i.e., both acidic and alkaline) 12) . Noble metals are known to be resistant to corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, biological risks can be kept to a minimum with the use of high-noble and noble alloys because ion release from these alloys is lower 1,2,10,[13][14][15] . Nonetheless, there were conflicting reports on ion release behavior from noble alloys in low pH conditions, which could be attributed to differences of the environment surrounding the tested alloys 12) . On one hand, it was reported that low pH caused ion release from Au alloy to increase; on the other hand, it was also reported that noble alloys were not significantly affected by a low pH 10,12) .…”

Section: Introductionmentioning

confidence: 99%

Ion release from metal-ceramic alloys in three different media

2011

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The aim of this in vitro study was to assess the effect of pH changes on ion release of metal-ceramic dental casting alloys. Samples from four commercially available alloys (Wirobond C, Wiron 99, Rematitan CP-Ti grade 1, and PontoStar) were prepared and polished. Ion release of alloys subjected to three different pH media (artificial saliva of pH 2.3, pH 6.5 and 0.9% saline solution of pH 7.3) for periods of 7, 15, 30, and 60 days were assessed by means of atomic absorption spectroscopy. Microscopic changes on surfaces of metallic samples before and after immersion were compared by scanning electron microscopy. ANOVA was used for statistical analysis of results. For all ions, pH and period interactions were statistically significant: highest amount of ion release occurred after 60 days of immersion regardless of pH value. For every alloy, ion release results were highest in artificial saliva of pH 2.3 and lowest in 0.9% saline solution. It was concluded that ion release from alloys was pH-dependent.

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“…Despite the many studies reporting adherence of Streptococcus mutans on the surface of dental alloys 5,[9][10]13,15,17 , this study has proved that even release of metal ions with the samples incubated in constant agitation, there was adherence and development of the colonies. In other studies that did not use those conditions, the samples remained in the resting tube.…”

Section: Discussionmentioning

confidence: 99%

“…Dental biofilm also known as dental plaque is usually disastrous. It colonizes and also contaminates not only dental surfaces but also restorations, metallic surfaces of prostheses and implants [3][4][5] , causing corrosion in pits, in a similar way as demineralized areas and decalcified cavities on tooth enamel.…”

Section: Introductionmentioning

confidence: 99%

Streptococcus mutans adhesion and releasing of metallic ions in dental alloys

Zavanelli¹,

Zavanelli²,

Mazaro³

et al. 2015

Braz. J. Oral Sci.

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Aim: To evaluate the adherence of Streptococcus mutans to the surface of the amalgam and copper/aluminum alloy samples and also evaluate the release of metallic ions. Methods: The prepared medium was changed every 72 h and analyzed by atomic absorption spectrophotometer. Samples were removed from the prepared medium at 15, 30, 48 and 60 days. Results: The result shows that ions released were statistically different among all groups, and so were both biofilm and pits formation and the corrosion induced by the S. mutans in both types of samples. SEM observation of the samples immersed in the prepared medium with S. mutans showed adherence of microorganisms on the whole surface, in all groups. Conclusions: The S. mutans adhere to both amalgam and copper/aluminum alloy causing corrosion of those restorations. S. mutans produced a greater ions release in Cu/Al alloy; in amalgam, the ions release was not influenced by exposure to S. mutans.

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Elemental ion release from four different fixed prosthodontic materials

Cited by 63 publications

References 28 publications

Urinary Nickel Ion Evaluation of Adolescents during the Initial Period of Orthodontic Fixed Treatment

Urinary Nickel Ion Evaluation of Adolescents during the Initial Period of Orthodontic Fixed Treatment

Ion release from metal-ceramic alloys in three different media

Streptococcus mutans adhesion and releasing of metallic ions in dental alloys

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