Document Detail

In vitro evaluation of the effect of dietary acids and toothbrushing on human root dentin permeability.
MedLine Citation:
PMID:  20213027     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: The purpose of this in vitro study was to quantify the alterations in human root dentin permeability after exposure to dietary acids and to evaluate the effect of toothbrushing after acid application. METHOD AND MATERIALS: Extracted human third molars had their crowns sectioned above the CEJ, pulp tissue removed, and cervical root dentin exposed using a high-speed bur (approximately 1 mm in depth of substance loss). From each root fragment, one specimen was prepared. A total of 25 specimens were used and distributed randomly into five groups. The specimens were attached to a hydraulic pressure apparatus to evaluate the alterations of root dentin permeability after exposure to different acids. Dentin permeability was measured after the following sequential steps: (1) treatment with EDTA for 3 minutes to obtain the maximum permeability; (2) root planing to create a smear layer; (3) exposure to different acidic substances for 5 minutes (vinegar, cola drink, lemon juice, white wine, and orange juice); and (4) brushing for 3 minutes. RESULTS: All acidic substances increased dentin permeability after root planing. Lemon juice produced higher values for permeability when compared to the other substances (P = .009); moreover, orange juice showed similar results (P < .02) except when compared to vinegar (P = .12). Brushing right after acid exposure significantly reduced dentin permeability except in the vinegar group (P = .07). CONCLUSION: Under the experimental conditions, dietary acids increased root dentin permeability, and immediate brushing reduced permeability levels.
Daniela Leal Zandim; Fabio Renato Manzolli Leite; Jos? Eduardo Cezar Sampaio
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Quintessence international (Berlin, Germany : 1985)     Volume:  41     ISSN:  1936-7163     ISO Abbreviation:  Quintessence Int     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-09     Completed Date:  2010-06-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0342677     Medline TA:  Quintessence Int     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  257-63     Citation Subset:  D    
Department of Diagnostic and Oral Surgery, School of Dentistry at Araraquara, S?o Paulo State University, Araraquara, S?o Paulo, Brazil.
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MeSH Terms
Acetic Acid / adverse effects*
Beverages / adverse effects*
Citric Acid / adverse effects*
Dentin Permeability / drug effects*
Dentin Sensitivity / chemically induced,  prevention & control*
Statistics, Nonparametric
Tooth Cervix / drug effects
Tooth Root / drug effects
Young Adult
Reg. No./Substance:
64-19-7/Acetic Acid; 77-92-9/Citric Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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