Effect of Irrigants and Cementum Injury on Diffusion of Hydroxyl Ions through the Dentinal Tubules

Sherma Saif; Clifton M. Carey; Patricia A. Tordik; Scott B. McClanahan

doi:10.1016/j.joen.2007.09.010

Effect of Irrigants and Cementum Injury on Diffusion of Hydroxyl Ions through the Dentinal Tubules

Sherma Saif, Clifton M. Carey, Patricia A. Tordik, Scott B. McClanahan

Restorative Sciences

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

This study measured hydroxyl ion diffusion through dentinal tubules into a bathing solution. Eighty single-canal, instrumented teeth were divided into 8 groups. Control groups 1 and 3 were irrigated with 10 mL 0.9% saline and 10 mL 6% sodium hypochlorite (NaOCl), respectively. Control groups 5 and 7 were irrigated with 3 mL and 1 mL 17% ethylenediaminetetraacetic acid (EDTA) and then 10 mL 6% NaOCl, respectively. Experimental groups 2, 4, 6, and 8 were irrigated as groups 1, 3, 5, and 7, followed by placement of calcium hydroxide (Ca(OH)₂) into canals. Bathing solution pH was recorded for 30 days, a cementum defect was made, and then pH was recorded for another 30 days. With a paired difference test, average pH during steady state was statistically different and higher after the defect (P < .001). With Tukey multiple comparisons, post-defect pH for group 6 was found to be significantly greater (P < .01) than in other groups. This study indicated final canal irrigation with 3 mL 17% EDTA and 10 mL 6% NaOCl before Ca(OH)₂ placement allowed the greatest hydroxyl ion diffusion to the root surface.

Original language	English (US)
Pages (from-to)	50-52
Number of pages	3
Journal	Journal of Endodontics
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/j.joen.2007.09.010
State	Published - Jan 2008

Bibliographical note

Funding Information:
This study was supported by USPHS Research Grant DE 14707 to the American Dental Association Foundation from the National Institutes of Health – National Institute of Dental and Craniofacial Research and is part of the dental research program conducted by the National Institute of Standards and Technology in cooperation with the American Dental Association Foundation.

Keywords

Calcium hydroxide
diffusion
ethylenediaminetetraacetic acid
hydroxyl ions
smear layer

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title = "Effect of Irrigants and Cementum Injury on Diffusion of Hydroxyl Ions through the Dentinal Tubules",

abstract = "This study measured hydroxyl ion diffusion through dentinal tubules into a bathing solution. Eighty single-canal, instrumented teeth were divided into 8 groups. Control groups 1 and 3 were irrigated with 10 mL 0.9% saline and 10 mL 6% sodium hypochlorite (NaOCl), respectively. Control groups 5 and 7 were irrigated with 3 mL and 1 mL 17% ethylenediaminetetraacetic acid (EDTA) and then 10 mL 6% NaOCl, respectively. Experimental groups 2, 4, 6, and 8 were irrigated as groups 1, 3, 5, and 7, followed by placement of calcium hydroxide (Ca(OH)2) into canals. Bathing solution pH was recorded for 30 days, a cementum defect was made, and then pH was recorded for another 30 days. With a paired difference test, average pH during steady state was statistically different and higher after the defect (P < .001). With Tukey multiple comparisons, post-defect pH for group 6 was found to be significantly greater (P < .01) than in other groups. This study indicated final canal irrigation with 3 mL 17% EDTA and 10 mL 6% NaOCl before Ca(OH)2 placement allowed the greatest hydroxyl ion diffusion to the root surface.",

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author = "Sherma Saif and Carey, {Clifton M.} and Tordik, {Patricia A.} and McClanahan, {Scott B.}",

note = "Funding Information: This study was supported by USPHS Research Grant DE 14707 to the American Dental Association Foundation from the National Institutes of Health – National Institute of Dental and Craniofacial Research and is part of the dental research program conducted by the National Institute of Standards and Technology in cooperation with the American Dental Association Foundation. ",

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Effect of Irrigants and Cementum Injury on Diffusion of Hydroxyl Ions through the Dentinal Tubules

Abstract

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Keywords

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