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The Effects of Calcium Hydroxide on Dentin Permeability

Departments of Oral Biology and Physiology, Medical College of Georgia, Augusta, Georgia 30912

S. Kalathoor

Departments of Oral Biology and Physiology, Medical College of Georgia, Augusta, Georgia 30912

D. Burnham

Departments of Oral Biology and Physiology, Medical College of Georgia, Augusta, Georgia 30912

Calcium hydroxide paste was applied to human dentin in vitro to determine its effects on dentin permeability. Discs of dentin were acid-etched on both sides to permit determination of their maximum permeability. Smear layers were then applied to the enamel sides of the discs, thereby reducing dentin permeability 99%. Topical application of Ca(OH)₂ paste to the smear layer reduced dentin permeability further, to levels 48% below that of untreated smear layers. When the Ca(OH) ₂-treated smear layers were exposed to 6% citric acid for two min, dentin permeability returned to the initial acid-etched value, demonstrating that Ca(OH)₂ offers little protection to acid challenge. Treatment of acid-etched dentin with Ca(OH)₂ produced a similar reduction in dentin permeability, which was restored to normal following acid challenge. Thus, Ca(OH)₂ is effective at reducing the permeability of both the smear layer and of acid-etched dentin, in vitro.

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Journal of Dental Research, Vol. 65, No. 3, 417-420 (1986)
DOI: 10.1177/00220345860650030801


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Pashley, D.H. Articles by Burnham, D. Search for Related Content PubMed PubMed Citation Articles by Pashley, D.H. Articles by Burnham, D. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB CALCIUM HYDROXIDE CITRIC ACID Social Bookmarking                         What's this?