Effects of aluminum oxalate/glycine pretreatment solutions on dentin permeability.

M. D. Simpson, J. A. Horner, P. D. Brewer, F. Eichmiller, D. H. Pashley

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Aluminum oxalate buffered with glycine to pH 0.5-2.5 has been proposed as a dentin pretreatment for the Gluma bonding system. In this experiment, the effects of 1-minute treatments of smear layers with these aluminum oxalates on the permeability of human dentin were determined in vitro. The aluminum oxalate solutions at pH 0.5-1.5 removed most of the original smear layer but occluded the tubules with crystalline deposits which decreased dentin permeability. Those solutions used at pH 2.0 and 2.5 increased dentin permeability. All dentin pretreatments increased dentin permeability when measured after a 24-hour storage period, especially the solutions at pH 2.0 and 2.5. The SEM correlates of these permeability changes indicated that these solutions remove the smear layer but reocclude the tubules with precipitates which are probably different forms of calcium oxalate, aluminum phosphate and calcium phosphates.

Original languageEnglish (US)
Pages (from-to)324-328
Number of pages5
JournalAmerican journal of dentistry
Issue number6
StatePublished - Dec 1992

ASJC Scopus subject areas

  • Dentistry(all)


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