The effect of the operator on the clinical performance of amalgam

Mahler, David B.; Marantz, Richard L.

doi:10.14219/jada.archive.1979.0244

Cited by 22 publications

(4 citation statements)

References 5 publications

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“…To our knowlsizes in the mandibular premolars compared edge there are no previous reports in which The clinical performance of the different alloys is in accordance with previous reports in that the marginal degradation was less for the non-gamma-2 alloys than for the conventional lathe-cut alloys (1)(2)(3)(4)(5)(6)(7)(8)20). It has been suggested that a superior material would perform better for all dentists ( 4,6). This hypothesis was strengthened by the present findings.…”

Section: Discussionsupporting

confidence: 89%

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Clinical variables affecting the marginal degradation of amalgam restorations

Jokstad

Mjör

1990

Acta Odontologica Scandinavica

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Jokstad A, Mjor IA. Clinical variables affecting th~ marginal degradation of amalg'llll restorations. Acta Odontol Scand 1990;48:379--387. Oslo. ISSN 0001-6357.The influence of different clinical variables on the marginal degradation of amalgam restorations was studied in a clinical trial of class-II amalgam restorations. Seven Scandinavian dentists using 5 different alloys placed 468 restorations in 210 patients. The marginal degradation was scored on impressions of the restored teeth by using a six-point ordinal rating scale and was transformed to ridit values. After 5 years 126 patients with 296 restorations remained in the trial. Ridit analysis and paired comparison tests utilizing the Bonferroni correction factor at each yearly interval indicated that the extent of degradation of the restoration margins was influenced by the location in the mouth,. the position on: · the tooth, the ·type of alloy, and the operator. The results demonstrate that features of the cavity preparation and the handling of the material by the operator are more important for the degradation of the restoration margins than other clinical variables. D Amalgam degradation; clinical study; dental materials; iatrogenic effects; operative dentistry Asbjomlokstad,

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Section: Discussionsupporting

confidence: 89%

“…Longitudinal clinical trials have demonstrated that the extent of marginal degradation of amalgam restorations is operatordependent (1)(2)(3)(4)(5)(6)(7)(8)(9). The mechanism of this dependence is not established, but it has been suggested that the handling properties of the alloy and the condensation techniques of the operators.…”

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confidence: 99%

Clinical variables affecting the marginal degradation of amalgam restorations

Jokstad

Mjör

1990

Acta Odontologica Scandinavica

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“…Several investigators (Letzel & Vrijhoef, 1984;Mahler and Marantz, 1979b;Goldberg et al, 1980) found the 'operator effect' to have a small but significant influence on marginal breakdown. According to Letzel & Vrijhoef (1984), care should be taken in the evaluation of this variable since operator samples may be highly selected in controlled studies.…”

Section: Discussionmentioning

confidence: 99%

The amalgam margin angle, marginal breakdown and adjacent caries in occlusal enamel, a pilot study on extracted teeth

Grajower

Novickas

1988

J of Oral Rehabilitation

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The object of this study was to determine for amalgam restorations the relationship between marginal breakdown and (i) over- or undercarving; (ii) the amalgam margin angle (AMA); and (iii) the incidence of carious occlusal enamel adjacent to the restoration. Fifty-two extracted human teeth with occlusal amalgam fillings from the Chicago (C) area and forty-three teeth from the Jerusalem (J) area, were examined with a probe. Employing common clinical criteria, it was found that replacement of the fillings was indicated due to extensive marginal defects, in 45% of the C teeth, and 41% of the J teeth. The occlusal amalgam margins and the incidence of caries adjacent to these margins were studied on facio-lingual sections. The incidence and the average AMA values for six margin types were measured on random sections and were found to be: all margins (100%, 67 degrees); intact flush margins (31%, 69 degrees); fractured flush margins (21%, 56 degrees); undercarved margins which fractured (22%, 74 degrees), or did not fracture (9%, 80 degrees) near the cavity margin; margins with amalgam deficiencies (12%, 62 degrees); and margins with separation between enamel and amalgam by remnants of linings (5%). Marginal breakdown was found in 42% of the margins and was associated mainly with flush carving at low AMAs, and with broken flashes resulting from undercarving. Occlusal carious enamel was detected on 19% of the J teeth and none of the C teeth. Sixty-three per cent of these lesions were associated with fractured undercarved margins.

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“…Key words: dental materials; pre-clinical dental educaton; dental amalgam. Studies have shown a significant effect on amalgam restoration survival with different operators (13)(14)(15). This emphasises the need for effective practical training in amalgam placement at both undergraduate and graduate level (16).…”

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confidence: 99%

The value of extended‐setting‐time amalgam in pre‐clinical practice in undergraduate dental training

Jedynakiewicz

Urbanska

2000

Eur J Dental Education

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This is a single-blind controlled study investigating the advantages of extended-setting time dental amalgam compared to a standard amalgam in the training of undergraduate dental students. 50 dental students were randomly assigned 1 of the 2 alloys for each restoration placed in the study. Each student placed class I and class II restorations in extracted human teeth mounted in typodont arches. 449 completed restorations were available for assessment, 228 restorations in the experimental group and 221 restorations in the control group. The test restorations were overall marginally inferior to those of the control group. There appears to be no advantage in using extended-setting time dental amalgam in undergraduate training.

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The effect of the operator on the clinical performance of amalgam

Cited by 22 publications

References 5 publications

Clinical variables affecting the marginal degradation of amalgam restorations

Clinical variables affecting the marginal degradation of amalgam restorations

The amalgam margin angle, marginal breakdown and adjacent caries in occlusal enamel, a pilot study on extracted teeth

The value of extended‐setting‐time amalgam in pre‐clinical practice in undergraduate dental training

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