Clinical evaluation of corrosion resistance of conventional alloy, spherical-particle alloy, and dispersion-phase alloy

Duperon, D F; Nevile, M.D.; Kasloff, Z

doi:10.1016/0022-3913(71)90128-4

Cited by 59 publications

(11 citation statements)

References 7 publications

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“…The degree of ad aptation is in its turn dependent on the plas ticity in the amalgam during its condensa tion in the cavity [Jorgensen, 1965;Granath, 1971]. The microspace may be reduced by time, since corrosion products may block the interspace more or less completely McCurdy et al, 1974], The dispersed amalgam differs from the conventional amalgams especially in its greater resistance to corrosion [Duperon et al, 1971] and a reduction of the microspace around this amalgam would therefore be less pronounced.…”

mentioning

confidence: 99%

Artificial Caries-Like Lesions around Conventional, Fluoride-Containing and Dispersed Amalgams

Heintze¹,

Mörnstad²

1980

Caries Res

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The study was undertaken to evaluate differences in development of caries-like lesions (wall lesions) around three principally different amalgams (conventional, fluoride-containing and dispersed) under standardized conditions. Amalgam restorations were made on sound buccal and lingual surfaces of extracted premolars. After 10 weeks in an acidified gelatin gel the teeth were sectioned through the restorations and planoparallel ground sections were produced. The enamel surrounding the restoration was studied by polarized light microscopy after imbibition with quinoline (n = 1.62). It was found that the depth of the wall lesion and the extent of demineralized enamel were significantly less around the fluoride-containing amalgam than around the other two. Although not always statistically significant, the largest extent of demineralization was seen in wall lesions surrounding the dispersed amalgam. The number, depth and extent of wall lesions were significantly smaller in the cervical part of the cavities than in the coronal part. Signs of intermediate remineralization processes (presence of dark zones) were most often seen in relation to the fluoride-containing amalgam. These findings are discussed in relation to other differences between the amalgams, such as sealing property and corrosion proneness.

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confidence: 99%

Artificial Caries-Like Lesions around Conventional, Fluoride-Containing and Dispersed Amalgams

Heintze¹,

Mörnstad²

1980

Caries Res

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“…(Mahler et al, 1970;Binon et al, 1973, Duperon, Nevile & Kaslof, 1971. Creep is therefore a suitable parameter to have in a standard.…”

Section: Resultsmentioning

confidence: 97%

Flow and creep of dental amalgam

Espevik

1975

Acta Odontologica Scandinavica

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“…Most of these parameters are known to affect the microstructure of dental amalgams, especially the relative amounts of y, yi and y-2 phases (OTANI & JORGENSEN 1967). A correlation between the creep rate of amalgam and the incidence of marginal breakdown of amalgam restorations has been demonstrated (MAHLER, TERKLA, EYSDEN & REISBICK 1970, DUPERON, NEviLE & KASLOFF 1971, BINON, PHILLIPS, SWARTZ, NORMAN & MEHRA 1973, MOFFA 1974). These observations have focussed considerable importance and interest on creep as a parameter for the screening of the study and the alloys and mercury were proportioned according to manufacturer's directions (Table 1).…”

Section: Rodriguezmentioning

confidence: 92%

Creep of dental amalgam

Espevik

Sørensen

1975

European J Oral Sciences

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The Steady-State creep rates of dental amalgams were measured and the creep rates were correlated with the microstructure of the amalgams. The influence of manipulation variables on creep rate and microstructure was evaluated. The samples were either mechanically or hand triturated, hand condensed, and stored at 20°C for 7 d. The specimens were subjected to a constant tensile load for 24 h, and the elongation was measured with a displacement transducer. The smallest creep rate was found on a spherical amalgam, and the highest on an amalgam made from a preamalgamated fine grain alloy. A correlation between microstructure and creep rate could be demonstrated. The amount of 72 phase did not seem to influence the creep rate. Amalgams that had large closely packed y particles surrounded by a small volume fraction of yi phase exhibited a low creep rate. Amalgams that had small broken up y particles surrounded by a large volume fraction of 71 exhibited a high creep rate. Abusive manipulation of lathe-cut amalgam alloys resulted in high creep rates, small broken up 7 particles and a high volume fraction of 71.

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Clinical evaluation of corrosion resistance of conventional alloy, spherical-particle alloy, and dispersion-phase alloy

Cited by 59 publications

References 7 publications

Artificial Caries-Like Lesions around Conventional, Fluoride-Containing and Dispersed Amalgams

Artificial Caries-Like Lesions around Conventional, Fluoride-Containing and Dispersed Amalgams

Flow and creep of dental amalgam

Creep of dental amalgam

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