Holographic evaluation of the marginal fits of complete crowns loaded at the central fossa

Terry Y. Chen, Guan L. Chang, Shih H. Wu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In dentistry, a defect of cementation on the margins of crowns accumulates bacterial plaque easily. This can result in recurrent caries and periodontal disease. In this paper holographic interferometry was applied to evaluate the effect of masticatory force on various complete crowns. Four complete molar crowns made from different materials (Au alloy, Pd-Ag alloy, Ni-Cr alloy, and porcelain fused to metal) were tested. The out-of-plane displacements of the crown specimens were measured by the method of multiple observations. The displacements measured range from 6 to 10 μm under normal load (25 N). However, the marginal openings of all four crowns were estimated to be less than 0.2 μm. In addition the defect of the crown was examined.

Original languageEnglish
Pages (from-to)1364-1368
Number of pages5
JournalOptical Engineering
Volume34
Issue number5
DOIs
Publication statusPublished - 1995 Jan 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

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