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Micro‐computed tomography assessment of root dentin around fluoride‐releasing restorations after demineralization/remineralization
Author(s) -
Zan Khine W.,
Nakamura Keiki,
Hamba Hidenori,
Sadr Alireza,
Nikaido Toru,
Tagami Junji
Publication year - 2018
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/eos.12558
Subject(s) - demineralization , dentin , root caries , remineralisation , dentistry , fluoride , glass ionomer cement , tooth remineralization , carious lesion , chemistry , materials science , nuclear chemistry , enamel paint , medicine , inorganic chemistry
Using micro‐computed tomography (micro‐ CT ), this study assessed the inhibitory effect of three different types of restorations on root‐caries formation under a cariogenic challenge. Bovine‐root dentin blocks with a cylindrical cavity were divided into three restoration groups: a fluoride‐free self‐etch adhesive and a resin composite ( SE ‐ ES ); a self‐etch adhesive and a resin composite with multi‐ion release ( FL ‐ BF ); and a glass ionomer cement (Fuji‐ VII ). After the restorative procedures, the specimens were stored in artificial saliva for 1 d, then subjected to a demineralization solution for 4 d and a remineralization solution for 28 d. Mineral density and mean mineral loss of dentin around the restorations were measured using micro‐ CT . The mean mineral loss values of dentin around the restorations were highest among SE ‐ ES restorations and lowest among Fuji‐ VII restorations. Fuji‐ VII showed the highest mineral density and the lowest mineral loss after 28 d of remineralization. The observations made by scanning electron microscopy demonstrated that Fuji‐ VII created the smallest outer lesion followed by FL ‐ BF and SE ‐ ES . Fuji‐ VII has a larger inhibitory effect on root caries around the restorations and enhances remineralization more effectively than either FL ‐ BF or SE ‐ ES . Multi‐ion and fluoride release from the restorative materials may be beneficial for inhibition of root‐dentin caries around the restorations.