Corrosion behavior and microhardness of three amalgams

Patsurakos, Ajis; Moberg, Lars-Erik

doi:10.1111/j.1600-0722.1988.tb01570.x

Cited by 7 publications

(13 citation statements)

References 15 publications

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“…According to Patsurakos & Moberg (1988), SEM studies showed the grain boundaries on the amalgam surface. The SEM micrographs revealed that all of the amalgam samples were corroded in PBS solutions pH 3·5 and 6·5 and Permite‐C ® containing indium and Logic ® containing platinum had smoother surfaces when compared with the others.…”

Section: Discussionmentioning

confidence: 99%

“…1975). Patsurakos & Moberg (1988, 1990) have reported that copper release was different in the amalgams with high copper content. In the present study it was determined that the copper release in the low copper‐containing amalgams was higher than that of high copper‐containing amalgams.…”

Section: Discussionmentioning

confidence: 99%

“…Johansson & Mjör (1988) reported that a microhardness test was suitable to show the resistance of amalgam for a long period and there was a significant relationship between microhardness data and corrosion resistance. Patsurakos & Moberg (1988) showed that the more copper there is in amalgam, the more resistance it has to corrosion. Johnson & Powell (1992) proved that the addition of indium to the amalgam increased the microhardness.…”

Section: Discussionmentioning

confidence: 99%

“…On the 60th days each amalgam sample was removed from the test solutions and the microhardness tests were performed by means of a hardness tester ¶ , using Rockwell's diamond indentor. The Rockwell Super Sicial (RSS) microhardness number was measured electronically (Patsurakos & Moberg 1988). After hardness measurements, the microstructure of the cross‐sections of the samples were observed using a scanning electron microscope (SEM) ** .…”

Section: Methodsmentioning

confidence: 99%

“…Dental amalgam tends to corrode and fracture at the margins (Patsurakos & Moberg 1988). To overcome the corrosion at the margins of amalgam, the noble metals are added to the dental amalgams.…”

Section: Introductionmentioning

confidence: 99%

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In vitro corrosion behaviour and microhardness of high‐copper amalgams with platinum and indium

Aydın

Işimer

et al. 1999

J of Oral Rehabilitation

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Samples prepared from Luxalloy, GS-80, Permite-C and Logic and polished after 24 h by traditional methods were stored in polypropylene tubes containing phosphate-buffered saline solutions (pH 3.5 and 6.5) and distilled water. The amounts of mercury, silver, tin, copper, zinc, platinum and indium in the test solutions were determined at the first, second, eighth, 52nd and 78th week by atomic absorption spectrometry. At the end of the eighth week the amalgam samples were removed from solutions and evaluated by Rockwell Super Scial Microhardness tester. Statistically significant low amounts of metal ions were measured for Permite-C containing indium and Logic containing platinum. The microhardness test results showed that there were statistically significant increases in the microhardness of Permite-C and Logic. As a result it was shown that the amalgam samples were affected from corrosion conditions to different degrees. Sample of the Logic group that was stored in distilled water, showed smoother surface properties than other amalgam samples containing high copper. However, it was observed that samples of Permite-C group had the smoothest surface properties.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

In vitro corrosion behaviour and microhardness of high‐copper amalgams with platinum and indium

Aydın

Işimer

et al. 1999

J of Oral Rehabilitation

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Estudo de parâmetros para ensaios de microdureza em amálgama de prata, resina composta, dentina e esmalte bovinos

Soprano¹

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The hardness is a mechanical property utilized to compare restorative materials such as biological tissue and can be defined as the resistance of material for a permanent impression and a number related to the applied force and the surface area. As each material has its own mechanical characteristic, for this study utilized two materials: amalgam and composite resin and two dental tissues: bovine dentin and enamel. In total were 20 specimes, divided among 4 groups: A, R, D, E equivalent for each superficial. The groups A and R received cavities preparation that were restored into with the respective materials, the group D had the superficial wore until exposure of the dentin and the group E was so planning. For the microhardness testing were utilized Vickers and Knoop indenter; loads of 25, 50 and 100gf in 5 time of application 5, 15, 30, 45 e 60 seconds. The values were submitted for statistical analysis by Kruskall-Wallis and Student-Newman-Keus tests (p<0.05). Due to the results, it is concluded that the amalgam presented a minimum load adequated of 50gf and a time of application of 30 seconds as the Vickers as Knoop. In the composite resin the minimum load was 50gf and time was 45s for Knoop, the Vickers didn't have statistical diference. In dentin the minimum load was 50gf for all studies times for two tests. And the enamel presented the minimum load adequated was 100gf for all the times in the Knoop microhardness, the Vickers test didn't have statistical diference.

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Estudo das propriedades físicas e mecânicas de materiais restauradores odontológicos submetidos a condições de inumação e afogamento para fins periciais

Vicente¹

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Selma Siéssere e Silmara Aparecida Milori Corona, pelos ensinamentos e conhecimentos compartilhados, em suas respectivas disciplinas, contribuindo para que essa conquista pudesse se concretizar, e pela influência que certamente terão nas próximas etapas de minha carreira. Ao Prof. Dr. Ricardo Henrique Alves da Silva, pela supervisão no PAE (Programa de Aperfeiçoamento de Ensino). Aos meus colegas da pós-graduação, pela amizade, companheirismo e pelos momentos compartilhados, que serão sempre lembrados. À Indústria e Comércio de Carnes Minerva Ltda., de Barretos (SP), pela doação dos dentes bovinos utilizados neste estudo. À Prefeitura do Campus de Ribeirão Preto, da Universidade de São Paulo, na pessoa de seu prefeito, Prof. Dr. Osvaldo Luiz Bezzon, pela autorização para a realização dos experimentos no lago do campus.

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Corrosion behavior and microhardness of three amalgams

Cited by 7 publications

References 15 publications

In vitro corrosion behaviour and microhardness of high‐copper amalgams with platinum and indium

In vitro corrosion behaviour and microhardness of high‐copper amalgams with platinum and indium

Estudo de parâmetros para ensaios de microdureza em amálgama de prata, resina composta, dentina e esmalte bovinos

Estudo das propriedades físicas e mecânicas de materiais restauradores odontológicos submetidos a condições de inumação e afogamento para fins periciais

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