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

doi:10.1177/154405910308200214

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

Journal article

Peer reviewed

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

A S AL-Helal, S R Armstrong, X J Xie and J S Wefel

Journal of dental research, Vol.82(2), pp.146-150

02/2003

DOI: 10.1177/154405910308200214

PMID: 12562890

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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 (H(3)PO(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 H(3)PO(4) cavity surface treatment as revealed by ANOVA and Tukey's multiple comparisons (p < or = 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.

Microscopy, Electron, Scanning

Cariostatic Agents - therapeutic use

Humans

Electron Probe Microanalysis

Microscopy, Polarization

Acrylic Resins - pharmacology

Molar

Secondary Prevention

Phosphoric Acids - pharmacology

Glass Ionomer Cements - chemistry

Dental Cavity Preparation

Tooth Demineralization - prevention & control

Microradiography

Dentin - drug effects

Analysis of Variance

Fluorides - therapeutic use

Smear Layer

Surface Properties

Statistics, Nonparametric

Acid Etching, Dental

Root Caries - prevention & control

Dental Restoration, Permanent - methods

Details

Title: Subtitle: Effect of smear layer on root demineralization adjacent to resin-modified glass ionomer
Creators: A S AL-Helal - Dows Institute for Dental Research, College of Dentistry N413, The University of Iowa, Iowa City, IA 52242-1010, USA
S R Armstrong
X J Xie
J S Wefel
Resource Type: Journal article
Publication Details: Journal of dental research, Vol.82(2), pp.146-150
Publisher: United States
DOI: 10.1177/154405910308200214
PMID: 12562890
ISSN: 0022-0345
eISSN: 1544-0591
Grant note: P30 DE 10126 / NIDCR NIH HHS
Language: English
Date published: 02/2003
Academic Unit: Preventive and Community Dentistry; Biostatistics; Operative Dentistry; Dental Research
Record Identifier: 9983917791302771

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