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

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

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

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
StatePublished - Feb 1994
Externally publishedYes

ASJC Scopus subject areas

  • General Dentistry

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