Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/120001
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Type: Journal article
Title: Effect of demineralization time on the mineral composition and mechanical properties of remineralized dentin
Author: Lavigne, O.
Vu, A.
Richards, L.
Xie, Z.
Citation: Journal of Oral Science, 2018; 60(1):121-128
Publisher: Nihon University School of Dentistry
Issue Date: 2018
ISSN: 1343-4934
1880-4926
Statement of
Responsibility: 
Olivier Lavigne, Anh M. Vu, Lindsay Richards and Zonghan Xie
Abstract: The aim of this study was to determine whether recovery of mineral levels restored the mechanical properties of dentin subjected to different durations of demineralization. Dentin at the floor of class 1 cavities (n = 12) was demineralized for 1, 2, and 3 weeks. Half the demineralized cavity floor was coated (control side), and a Fuji IX restoration was placed. The remaining half was therefore in contact with the Fuji IX restoration (test side). Simulated dentin tubular fluid was then supplied to each pulp chamber for 6 weeks. After remineralization, the teeth were detached from the system and sectioned. Concentrations of calcium, phosphorus, fluorine, and strontium and mechanical properties (hardness and Young's modulus) of the test and control sides were determined by electron probe microanalysis and nano-indentation, respectively. For remineralized dentin demineralized for 1 week, the substantial uptake of mineral elements restored hardness and Young's modulus at depths of 50 to 200 μm from the lesion front. For longer periods of demineralization (2 and 3 weeks), structural damage to the demineralized dentin was severe and impeded recovery of mechanical properties, despite mineral uptake.
Keywords: Caries; mechanical properties; mineral content; remineralization; tooth dentin
Rights: © 2018 by Nihon University School of Dentistry
RMID: 0030084328
DOI: 10.2334/josnusd.17-0038
Appears in Collections:Dentistry publications

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