Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Effect of different acidities of electrolyzed water on dentin surface roughness, decalcification and microhardness —a preliminary study
Ker-Kong CHENChau-Hsiang WANGChun-Chan TINGShin-I WEIJe-Kang DU
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2016 Volume 35 Issue 5 Pages 803-809


This study investigated the exposed coronal superficial dentin of 28 human molars were immersed in strongly acidic electrolyzed water (AW group), neutral electrolyzed water (NW group), 5% sodium hypochlorite (negative control, NL group), or deionized water (positive control, DW group). Microhardness was determined at 5-min intervals for 60 min. Surface roughness, energy dispersive X-ray spectroscopy and scanning electron microscopy analyses were performed after 5 and 60 min. Reductions in microhardness were observed in the AW, NW and NL groups, with further decreases as immersion time increased. Surface roughness was also markedly greater, and the Ca/P ratio markedly decreased, in the AW group. Prolonged immersion of dentin in strongly acidic electrolyzed water markedly decreased the microhardness and Ca/P ratio and markedly increased surface roughness. Prolonged immersion can lead to greater softening effect in dentin depending on the acidity of the electrolyzed water used.

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© 2016 The Japanese Society for Dental Materials and Devices
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