Corrosion of Amalgam Restorations

Mateer, R.S.; Reitz, Clair D.

doi:10.1177/00220345700490023401

Cited by 70 publications

(21 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…39 In animal studies Hörsted-Bindslev et al 56 and Akyüz and Çaglar 57 demonstrated penetration of Hg from amalgam into dentin and pulp tissue. The former authors suggested that base material can prevent mercury uptake into dentin, the latter showed significant reduction of mercury uptake but bases could not prevent this.…”

Section: Discussionmentioning

confidence: 98%

“…39 Dentin cavity walls underneath amalgam restorations must have undergone structural histological and chemical changes by past caries attacks. Subsequent operative treatment is aimed at excavating soft caries infected dentin, obturation of the cavity and remineralisation of the remaining hard caries affected dentin.…”

Section: Discussionmentioning

confidence: 99%

“…39,[42][43][44][45] Also Ca was found in corrosion products. 31 The mercury that is released from the γ 2 phase stays in its molecular form.…”

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 99%

“…It is the most easily corroded phase in conventional amalgams and it is also the weakest phase in mechanical aspect. 15,38,39 The Ag 3 Sn (γ) and Ag 2 Hg 3 (γ 1 ) phase are electrolytically stable and do not dissociate. In the complex interactions the γ 2 phase is selectively attacked by the corrosion process, resulting in oxidation of Sn.…”

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 99%

See 3 more Smart Citations

Penetration of amalgam constituents into dentine

Scholtanus

Özcan

Huysmans

2009

Journal of Dentistry

View full text Add to dashboard Cite

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...

show abstract

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

“…39,[42][43][44][45] Also Ca was found in corrosion products. 31 The mercury that is released from the γ 2 phase stays in its molecular form.…”

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 99%

Section: Corrosion Products Of Dental Amalgammentioning

confidence: 99%

See 2 more Smart Citations

Penetration of amalgam constituents into dentine

Scholtanus

Özcan

Huysmans

2009

Journal of Dentistry

View full text Add to dashboard Cite

show abstract

“…With time in clinical service, corrosion products formed by the interaction of metallic ions from amalgam with chlorine and oxygen in the oral environment fill this gap and have the potential to seal the amalgam restoration. [3][4][5][6] However, because the buildup of corrosion products takes time, it would be advantageous if these interfacial gaps could be sealed as quickly as possible.…”

mentioning

confidence: 99%

Corrosion Sealing of Amalgam Restorations In Vitro

Mahler¹,

Pham²,

Adey³

2009

Operative Dentistry

View full text Add to dashboard Cite

©Operative Dentistry, 2009, 34-3, 312-320 DB Mahler • BV Pham • JD Adey Clinical RelevanceAfter placement, amalgam restorations exhibit a gap between the restoration and tooth structure, which fills with corrosion products during time in clinical service. To reduce the time necessary to fill this gap, an amalgam that exhibits a small initial gap shortly after setting and an amalgam that contains zinc is recommended. SUMMARYAmalgam restorations, when first placed, have been shown to exhibit a gap at the amalgam/tooth interface. With time in service, this gap fills with corrosion products that have the potential to "seal" the restoration. With the advent of high-copper, more corrosion-resistant amalgams, there has been concern that the time required to create this seal would be increased significantly when compared with low-copper traditional amalgams. The current study was designed to address this concern. Amalgam was condensed into a MACOR mold, simulating a Class I cavity form and then immersed into a 1.0% NaCl solution to simulate oral conditions. Using an air pressure test, the sealing was monitored over time. The results showed that the sealing was influenced by the size of the initial gap prior to immersion as well as corrosion resistance of the amalgam and that a corrosion-resistant amalgam with a small initial gap size can seal as quickly as a corrosion-prone amalgam. Therefore, it is not possible to predict sealing behavior based on corrosion resistance, alone. Furthermore, the presence of zinc in the amalgam alloy has been shown to result in the formation of zinc corrosion products in the amalgam/mold margin, which contributes to more rapid sealing. Analysis of a tooth extracted after 16 years of clinical service that had been restored with an amalgam-containing zinc was also shown to contain zinc corrosion products in the occlusal marginal area. This could explain the reported reduction in marginal fracture of clinically placed amalgam restorations made from zinccontaining alloys.

show abstract

The in vivo and in vitro corrosion products of dental amalgams

Otani

Jesser

Wilsdorf

1973

J. Biomed. Mater. Res.

View full text Add to dashboard Cite

SummaryThe purpose of this investigation is to clarify the role of the component phases of dental amalgam in a corrosive environment and to analyze the corrosion products at various stages of formation predominantly by means of x-ray diffraction methods and energy dispersive x-ray spectroscopy. The study encompassed in vivo as well as in vitro experiments.Sn, which came from only the yz phase, was found to be the sole or main constituent that contributes to the formation of the corrosion products. SnO. )HzO constituted the majority of the corrosion products formed in the early stages. SnO appeared in corrosion products more than 14 days old.

show abstract

Corrosion of Amalgam Restorations

Cited by 70 publications

References 6 publications

Penetration of amalgam constituents into dentine

Penetration of amalgam constituents into dentine

Corrosion Sealing of Amalgam Restorations In Vitro

The in vivo and in vitro corrosion products of dental amalgams

Contact Info

Product

Resources

About