A comparison of methods for evaluating the marginal fracture of amalgam restorations

R. W. Bryant, D. B. Mahler, J. H. Engle

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

In this study, two methods for evaluating the marginal fracture of clinical amalgam restorations were compared. These were (1) matching photographs of the occlusal surfaces of restored teeth to a reference set of photographs; and (2) matching gypsum models of the same restored teeth to a reference set of gypsum models. Amalgam restorations made from 3 alloys were assessed at polish and at 1-, 2- and 3-year recalls. For each assessment period, both evaluation methods showed differences among the 3 alloys and ranked the alloys in the same order. Although the marginal fracture values for the photograph method were slightly higher than those for the model method, the correpondence between the values for each method was almost perfect (regression R2=0.988, α<0.001). Thus, in defining the 3-dimensional character of marginal fracture, the evaluation method using photographs was found to be equivalent to the evaluation method using models.

Original languageEnglish (US)
Pages (from-to)235-237
Number of pages3
JournalDental Materials
Volume1
Issue number6
DOIs
StatePublished - Dec 1985

Keywords

  • assessment methods
  • clinical marginal fracture
  • dental amalgam

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

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