Effect of smear layer on root demineralization adjacent to resin-modified glass ionomer

A. S. Al-Helal, S. R. Armstrong, X. J. Xie, J. S. Wefel

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The cariostatic effect of resin-modified glass ionomer (RMGI) on secondary root caries is well-documented. However, this beneficial effect may be dependent upon the mode of cavity surface treatment. To investigate this relationship, we studied 4 cavity surface treatments prior to the placement of RMGI: no treatment (None), polyacrylic acid (PAA), phosphoric acid (H3PO 4), and Scotchbond Multi-Purpose adhesive (SMP) as a control. Specimens were aged for two weeks in synthetic saliva, thermocycled, and subjected to an artificial caries challenge (pH 4.4). Polarized light microscopy (PLM) and microradiography (MRG) showed significantly less demineralization with the H3PO4 cavity surface treatment as revealed by ANOVA and Tukey's multiple comparisons (p ≤ 0.05). Dentin fluoride profiles determined by electron probe microanalysis (EPMA) supported PLM and MRG findings. It may be concluded that removal of the smear layer with phosphoric acid provides significantly enhanced resistance to secondary root caries formation adjacent to RMGI restorations.

Original languageEnglish (US)
Pages (from-to)146-150
Number of pages5
JournalJournal of Dental Research
Volume82
Issue number2
StatePublished - Feb 2003

Fingerprint

Smear Layer
Root Caries
Microradiography
Polarization Microscopy
carbopol 940
Cariostatic Agents
Electron Probe Microanalysis
Dentin
Fluorides
Saliva
Adhesives
Analysis of Variance
glass ionomer
phosphoric acid

Keywords

  • Demineralization
  • Fluoride
  • Glass ionomer
  • Root
  • Smear layer

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Effect of smear layer on root demineralization adjacent to resin-modified glass ionomer. / Al-Helal, A. S.; Armstrong, S. R.; Xie, X. J.; Wefel, J. S.

In: Journal of Dental Research, Vol. 82, No. 2, 02.2003, p. 146-150.

Research output: Contribution to journalArticle

Al-Helal, A. S. ; Armstrong, S. R. ; Xie, X. J. ; Wefel, J. S. / Effect of smear layer on root demineralization adjacent to resin-modified glass ionomer. In: Journal of Dental Research. 2003 ; Vol. 82, No. 2. pp. 146-150.
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