Corrosion of amalgams

Brune, Dag

doi:10.1111/j.1600-0722.1981.tb01715.x

Cited by 39 publications

(44 citation statements)

References 11 publications

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“…44 Cu was shown as Cu complexes were assumed to be leached out into the liquid environment. 51 However, in contrast to the in vivo observations, Cu containing corrosion products are detected and classified as Cu 2 O and CuCl 2 ·3Cu(OH) 2 in-vitro. The latter compound has a typical green color.…”

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 82%

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Penetration of amalgam constituents into dentine

Scholtanus

Özcan

Huysmans

2009

Journal of Dentistry

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OBJECTIVES: Amalgam restorations are replaced by adhesively placed composite resin restorations at an increasing rate. After the removal of amalgam dentine often shows marked dark discoloration that is attributed to the penetration of corrosion products from overlying amalgams. It is questioned whether penetration of metals into dentine affects the dentine as a substrate for adhesive procedures. This study has been performed to clarify the origin of dark discoloration of dentine by metals from amalgam with special regards to corrosion products. METHODS: A review of the literature has been performed using Medline database. As keywords dentine and amalgam, subsequently combined with penetration, interface, crevice, interaction, corrosion, were used. This was followed up by extensive hand search using reference lists of relevant articles. RESULTS: Data in the literature have been gathered from extracted amalgam filled teeth and from artificially aged amalgam filled teeth. Corrosion studies have been performed in vivo aged teeth as well as in vitro. Sn is the main element, followed by Zn and Cu, that is consistently found in dentine underneath amalgam, as well as in amalgam corrosion products and in marginal seal deposits. Penetration of elements from amalgam has only been observed in discolored and in demineralised dentine. CONCLUSIONS: Darkly discolored dentine as found underneath amalgam restorations contains amalgam corrosion products and is demineralised. Therefore it must be considered a different substrate for clinical procedures than sound dentine. Penetration of Amalgam Constituents into Dentin ABSTRACTObjective: Amalgam restorations are replaced by adhesively placed composite resin restorations at an increasing rate. After removal of amalgam, dentin often shows marked dark discoloration that is attributed to penetration of corrosion products from overlying amalgams. It is questioned if penetration of metals into dentin effects the dentin as a substrate for adhesive procedures. This study has been performed to clarify the origin of dark discoloration of dentin by metals from amalgam with special regards to corrosion products. Methods:A review of the literature has been performed using Medline database. As keywords dentin and amalgam, subsequently combined with penetration, interface, crevice, interaction, 2 corrosion, were used. This was followed up by extensive hand search using reference lists of relevant articles.Results: Data in the literature have been gathered from extracted amalgam filled teeth and from artificially aged amalgam filled teeth. Corrosion studies have been performed in vivo aged teeth as well as in vitro. Sn is the main element, followed by Zn and Cu, that is consistently found in dentin underneath amalgam, as well as in amalgam corrosion products and in marginal seal deposits. Penetration of elements from amalgam has only been observed in discoloured and in demineralised dentin. Conclusions:Darkly discoloured dentin as found underneath amalgam restorations contains amalgam cor...

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Section: Corrosion Products Of Dental Amalgammentioning

confidence: 82%

“…52,53 Zn has been identified as the major corrosion product released in saliva and ZnSn(OH) 6 has been detected on Zn-containing amalgams. 49,50,51,54 On both Zn-free conventional and Zn-free Cu-rich amalgams, CuSn(OH) 6 was found. 54 The…”

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 98%

Penetration of amalgam constituents into dentine

Scholtanus

Özcan

Huysmans

2009

Journal of Dentistry

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“…The importance of results from electrochemical corrosion studies is further enhanced by the experimental observation that, after an initial period of about 30 days, the primary corrosion process leading to changes and deterioration of amalgam fillings is electrochemical corrosion [16]. Other experimental methods such as simple rest potential measurements are less informative [2,12,17,18].…”

mentioning

confidence: 99%

A comparative study of the electrochemical corrosion behaviour of dental amalgams

1992

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The electrochemical corrosion behaviour of sixteen currently marketed amalgams for dental fillings was studied in vitro under experimental conditions closely resembling those of clinical application. Depending upon the type of amalgam and the treatment of the filling the electrochemical corrosion currents varied over several orders of magnitude; their change as a function of time was also very different. Suggestions are made for a stability rating of the products based on the results obtained.

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“…Dental amalgam releases mercury as vapour [-1-3], as ions [-4, 5], and as particulate matter [6]. In groups of people with no other known exposure to mercury than their amalgam restorations, there is a statistically significant correlation between urinary mercury concentration and the number of amalgam restorations ]- 7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of placing, removing and polishing of amalgam restorations on 24-h urinary mercury concentration

Haïkel

Livardjani

Allemann

et al. 1995

J Mater Sci: Mater Med

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Twenty-four-hour urinary mercury concentration were assessed in 43 patients before and after removing old amalgam fillings (8 pts), placing (13 pts), and polishing of amalgam (22 pts). Baseline analyses 8 days before the treatments showed on average 18.5_+7.2 tag mercury mass excreted per 24-h urine samples. The removal of old fillings caused a total excreted mass of 56.34-32.3 tag Hg, the placing of amalgam 45.9_+26.2 lag Hg, and the polishing 56.25_+33.77 tag Hg, respectively, one day after the treatments. When compared with the baseline values, the urinary mass excreted remained significantly elevated during the 8-day follow-up. However, all Hg values measured were below the WHO recommandations for the threshold limits for urinary mercury.

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Corrosion of amalgams

Cited by 39 publications

References 11 publications

Penetration of amalgam constituents into dentine

Penetration of amalgam constituents into dentine

A comparative study of the electrochemical corrosion behaviour of dental amalgams

Effect of placing, removing and polishing of amalgam restorations on 24-h urinary mercury concentration

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