Effect of smear layer removal on the diffusion permeability of human roots

David A. Galvan, Alfred E. Ciarlone, David Henry Pashley, James C. Kulild, Patrice D. Primack, Mark D. Simpson

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Abstract

Ten human maxillary incisors, extracted because of periodontal disease or nonrestorable caries, were obtained and instrumented to a size #70 K-Flex file at the working length using a standard stepback technique. Tritiated water (3H2O) was placed in the root canals and allowed to diffuse to the external surface of the roots until it reached a constant rate. The smear layer in each of the experimental roots was then removed using 0.5 M EDTA followed by 5.25% sodium hypochlorite (NaOCI). The constant rate diffusion of 3H2O was remeasured. The roots were then stored in deionized H2O for 2 months and the constant rate diffusion of 3H2O was remeasured. A statistically significant difference was noted between all three groups. A decrease in the diffusion permeability of the root to 3H2O was noted immediately after smear layer removal and the highest permeability was recorded after storage in the deionized water for 2 months.

Original languageEnglish (US)
Pages (from-to)83-86
Number of pages4
JournalJournal of Endodontics
Volume20
Issue number2
DOIs
Publication statusPublished - Jan 1 1994

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ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Galvan, D. A., Ciarlone, A. E., Pashley, D. H., Kulild, J. C., Primack, P. D., & Simpson, M. D. (1994). Effect of smear layer removal on the diffusion permeability of human roots. Journal of Endodontics, 20(2), 83-86. https://doi.org/10.1016/S0099-2399(06)81187-8