Abstract
This in vitro study evaluated the effect of commercially available remineralising products on demineralised dentine. Demineralised dentine was stored in pooled saliva or treated with Tooth Mousse, Tooth Mousse Plus, Gel-Kam or NeutraFluor 5000, for 7 days at room temperature. Dentine slices were microhardness tested, and assessed using scanning electron microscopy (SEM) and energy dispersive and Raman spectroscopy. Demineralisation decreased dentine microhardness and was increased following storage in saliva. However, Tooth Mousse and NeutraFluor 5000 treatment significantly increased (p<0.05) microhardness. SEM analyses showed that following demineralisation, dentine tubule openings were more clearly defined and treatment with saliva did not alter this surface appearance. Dentine tubules appeared to be occluded following treatment. With the exception of fluoride, few significant differences in elemental content between Tooth Mousse, Tooth Mousse Plus and NeutraFluor5000 were observed. All products significantly increased (p<0.001) fluoride levels compared with control, demineralised and saliva stored specimens. The increase in surface fluoride levels was significantly higher for Gel-Kam andNeutraFluor5000 (p<0.001). Raman spectrometry indicated that fluoride was being incorporated into apatite crystals following treatment with Tooth Mousse Plus, NeutraFluor 5000 and Gel-Kam.
Highlights
Dentine is a vital, hydrated and complex tissue that forms the largest component of the human tooth [1]
Fluoride levels were significantly higher for NF and GK compared with the Tooth Mousse products (p
The demineralisation protocol lowered the microhardness of the dentine surface and following storage in saliva, surface microhardness was restored to a value similar to that observed prior to demineralisation
Summary
Dentine is a vital, hydrated and complex tissue that forms the largest component of the human tooth [1]. Dentine remineralisation is a complicated process as it involves the interaction of minerals, collagen and non-collagenous proteins [4]. The non-collagenous proteins that adhere to the collagen matrix are thought to regulate the process through both inhibitory and acceleratory functions [9, 10].Enhancing dentine remineralisation is important in the treatment of dentinal hypersensitivity, cervical dentine wear and root caries [4]. Dental practitioners prescribe commercially available products in the management of dentine sensitivity symptoms and to enhance remineralisation of teeth in a susceptible oral environment. There is limited data available on the potential of these commercial products to manage dentine demineralisation. Most have been developed for the protection of enamel and considering the ultrastructural and compositional differences between enamel and dentine, these products may not exert comparable effects on the two substrates [11]
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