Fall of amalgam restoration: a 10‐year analysis of an Australian university dental clinic

Reher, Vanessa; Reher, Peter; Peres, Karen Glazer; Peres, Marco Aurélio

doi:10.1111/adj.12807

Cited by 20 publications

(15 citation statements)

References 23 publications

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“…Similarly, anti‐amalgam bills have been passed in some states of America, while Health Canada (in 1996) has suggested phasing down of amalgam usage and avoidance of amalgams for the age group up to 19 years, quoting no absence of clinical evidence of adverse health effects [65] . With the Minamata convention in place, the use of amalgams in dental restoration is likely to be phased down further, i. e., seen in Australia (since 2010), [66] yet amalgams are likely to remain important for tooth fillings somewhat longer.…”

Section: A Brief Historymentioning

confidence: 99%

A Short History of Fusible Metals and Alloys – Towards Room Temperature Liquid Metals

et al. 2022

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Liquid metals are a class of materials with a millennia-long history, albeit until 200 years ago, mostly centered on mercurybased applications. The knowledge of mercury's toxicity and the discovery of it's bioaccumulation and biomagnification in the late 20 th century resulted in phasing out mercury for copious application. Lead-based, bismuth-based, and sodiumbased technology has partially replaced mercury, but due to toxicity or reactivity issues, replacements for lead and sodium are sought. The discovery of indium and, especially, gallium has allowed for the third generation of alloys with a melting point close to room temperature. This review gives a comprehensive overview of the technological developments of fusible and liquid metals, i. e., metals and alloys with melting points below ca. 250 °C, from the early days to current research and industrial application. Special emphasis is focused on important steppingstones and recent developments of gallium-based alloys as well as how they could be used for future applications.

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Section: A Brief Historymentioning

confidence: 99%

A Short History of Fusible Metals and Alloys – Towards Room Temperature Liquid Metals

et al. 2022

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“…Today, dental restoration is one of the basic specialties of dentistry in which the use of resinous materials has exponentially increased because of their better physical, chemical, and biological characteristics than dental amalgam (Cho et al, 2022) and, in part, due to the race against the time generated by Minamata Convention on Mercury, which considered a proposal of phase-out amalgam by 2024 (Reher et al, 2021) other hand, a number of leachable and extractable chemicals from these materials have been reported, including Bisphenol-A (BPA), a well know potent endocrine disruptor (Cho et al, 2022;Nys et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Release Profile of Bisphenol-a From Dental Resins in Water Assessed by Lc-MS/MS

SILVA¹,

Rübensam²,

SAAFELD³

et al. 2022

Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE

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Dental resins have been designed to replace amalgam restorations due to their more favorable physical, chemical, and biological properties. However, depending on its composition, the efficiency of its polymerization, and the degradation of the polymer matrix, Bisphenol-A can be present and therefore released from this material to the human body. It has been reported that residues of additives and minority by-products of polymer reactions, such as Bisphenol-A, can be released from plastics into aqueous media through polymer hydration, water-polymer diffusion, residue dissolution, and equilibrium between dissolved residues in water and polymer. Over time, this could lead to a polymer material with an external layer practically free of Bisphenol-A. However, the newly formed layer could be removed by brushing during oral cleaning, similar to toothbrushing, exposing the new layer containing Bisphenol-A to the aqueous media. Due to the toxic effects of this compound, an increasing number of plastics labeled as BPA-free have been introduced to the dental market, including tooth coating, dental sealants, and resins. Nevertheless, more specific studies on analytical chemistry have revealed a trace of Bisphenol-A in dental resins labeled as BPA-free and pointed out the need for even more sensitive and accurate detection methods to help manufacturers evaluate the presence of background contaminations in their products and to avoid false-negative results. In this way, liquid chromatography-tandem mass spectrometry has been considered one of the most suitable methods for confirming Bisphenol-A even at low concentrations, in high complex matrices, due to its high select sensitivity. In the present work, we developed a sensitive, reliable, and efficient approach to trace the release profile of Bisphenol-A by LC-MS/MS in dental resin samples purchased in the Brazilian dental market. With the analysis of five different brands of resin composites performed in eight days of exposition to water, four of them released Bisphenol-A from 3.4 pg/mm2 to 10.1 ng/mm2. The brand labeled as BPA-free released BPA at concentrations of 1.1 ng/mm2. However, one sample reached the maximum of released BPA in only 3 days, one in 4 days, and two virtually did not reach a maximum of BPA released into the water in the window time assessed. Limits of detection and quantification of the LC-MS/MS method were 40 pg/mm2 and 100 pg/mm2, respectively, and allowed the quantification of BPA released from a composite labeled as BPA-free. For future analysis, we will conduct a more comprehensive study on the release profile of BPA from resin composites into the water using a tooth brushing simulator to determine if the obtained profiles might have clinical implications.

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“…Replacing the existing restoration may cause the restoration to grow by causing loss of substance in healthy adjacent tooth tissues [12,13]. Since repairing the restoration causes less destruction than the replacement of the existing restoration, it also reduces the risk of pulp damage and tooth fracture [14].…”

Section: Introduction *mentioning

confidence: 99%

Effects of High-Intensity Light Curing Devices and Resin Adhesive System on Repair Strength of Amalgam with Resin Composite

Ayar

DEMİRBAŞ

YEŞİL

2022

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This study aims to evaluate the effects of the new generation light curing devices and different adhesive systems on the shear repair strength between amalgam and resin composite. Ninety-six square-shaped amalgam (Cavex Non Gamma-2; Cavex Holland BV, Haarlem, the Netherlands) samples were prepared. The amalgam surfaces were polished with 600-grit abrasive paper. The prepared amalgam samples were divided into four groups (Single Bond Universal, 3M ESPE; Adper Easy One, 3M ESPE; Prebond SE, President Dental; OptiBond All-in-One, Kerr) according to the adhesive brand. Each adhesive group was divided into two subgroups according to the 3rd generation light curing devices (Elipar DeepCure-S [3M ESPE, USA], VALO Cordless [Ultradent, USA]) (n = 12). Microhybrid composite cylinders of 3 mm height and 2 mm diameter were placed on the amalgam surfaces by layered method with a silicone mold (Dynamic Plus; President Dental, Germany). Each layer was polymerized with a group specific light curing device. The samples were incubated in distilled water at 37 °C for 24 h before the shear-bond-strength test. The shear bond strength test was accomplished using a universal testing device. Statistical analyzes were made with two-way ANOVA and Tukey HSD tests. Two-way ANOVA revealed a significant effect of the adhesive system brand on bond strength (p < 0.00). Prebound SE provided the lowest bond strength between both light curing devices groups. There was no significant difference between the two light-curing devices groups among Single Bond Universal, Adper Easy One and OptiBond All-in-One resin adhesive systems. It has been revealed that the high-intensity LED light curing device brand does not have a significant effect on the amalgam-resin composite repair strength, and the repair strength may be more affected by the brand of the adhesive system used.

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Fall of amalgam restoration: a 10‐year analysis of an Australian university dental clinic

Cited by 20 publications

References 23 publications

A Short History of Fusible Metals and Alloys – Towards Room Temperature Liquid Metals

A Short History of Fusible Metals and Alloys – Towards Room Temperature Liquid Metals

Release Profile of Bisphenol-a From Dental Resins in Water Assessed by Lc-MS/MS

Effects of High-Intensity Light Curing Devices and Resin Adhesive System on Repair Strength of Amalgam with Resin Composite

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