UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Viscoelastic and chemical properties of dentine after different exposure times to sodium hypochlorite, ethylenediaminetetraacetic acid and calcium hydroxide

Ng, Y; Reddington, LP; Berman, A; Knowles, J; Nazhat, SN; Gulabivala, K; (2020) Viscoelastic and chemical properties of dentine after different exposure times to sodium hypochlorite, ethylenediaminetetraacetic acid and calcium hydroxide. Australian Endodontic Journal , 46 (2) pp. 234-243. 10.1111/aej.12397. Green open access

[thumbnail of AEJ-2019-035.R1_Proof_hi.pdf]
Preview
Text
AEJ-2019-035.R1_Proof_hi.pdf - Accepted Version

Download (1MB) | Preview

Abstract

This study aims to evaluate the viscoelastic and chemical properties of dentine after different durations of exposure to 5.25% NaOCl, 17% EDTA and Ca(OH)2 solutions, and NaOCl in alternating combination with EDTA. Standard dentine bars were randomly assigned to: (i) formal‐saline control‐1; (ii) NaOCl; (iii) EDTA; (iv) NaOCl/EDTA; (v) formal‐saline control‐2; (vi) Ca(OH)2 pH 12.6; and (vii) Ca(OH)2 pH 9.8. Groups 1‐–4 underwent 10 min cycles of soaking and dynamic mechanical analysis up to 120 min. Groups 5–7 underwent similar tests at days 7, 14, 28 and 84. FTIR spectra of dentine discs exposed to the same regimens assessed surface chemistry. NaOCl or Ca(OH)2 (pH 12.6) solutions reduced the organic (N‐H[1], N‐H[3], C=0) peak components of dentine. This study demonstrated that accumulative damage of dentine could be facilitated by alternated exposure to NaOCl and EDTA. Exposure of dentine to Ca(OH)2 (pH12.6) for 7 days reduced viscous behaviour, inferring increased potential for fatigue failure.

Type: Article
Title: Viscoelastic and chemical properties of dentine after different exposure times to sodium hypochlorite, ethylenediaminetetraacetic acid and calcium hydroxide
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/aej.12397
Publisher version: https://doi.org/10.1111/aej.12397
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: calcium hydroxide, dentine, EDTA, sodium hypochlorite viscoelastic,
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute > Biomaterials and Tissue Eng
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute > Restorative Dental Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10090499
Downloads since deposit
128Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item