Micro‐computed tomography assessment of root dentin around fluoride‐releasing restorations after demineralization/remineralization. (28th July 2018)

• Record Type: Journal Article
• Authors: Zan, Khine W.; Nakamura, Keiki; Hamba, Hidenori; Sadr, Alireza; Nikaido, Toru; Tagami, Junji
• Is Part Of: European journal of oral sciences. Volume 126:Number 5(2018)
• Page Start: 390
• Page End: 399
• Publication Date: 2018-07-28
• Subjects: fluorides -- mineral density -- tooth demineralization -- tooth remineralization -- X‐ray microtomography; Dentistry -- Periodicals; Oral medicine -- Periodicals; 617.6005
• DOI: 10.1111/eos.12558
• Languages: English
• ISSNs: 0909-8836

Abstract

Abstract : 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.