title: Dentin-cement interfacial interaction: calcium silicates and polyalkenoates.
abstract: The interfacial properties of a new calcium-silicate-based coronal restorative material (Biodentine™) and a glass-ionomer cement (GIC) with dentin have been studied by confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), micro-Raman spectroscopy, and two-photon auto-fluorescence and second-harmonic-generation (SHG) imaging. Results indicate the formation of tag-like structures alongside an interfacial layer called the "mineral infiltration zone", where the alkaline caustic effect of the calcium silicate cement's hydration products degrades the collagenous component of the interfacial dentin. This degradation leads to the formation of a porous structure which facilitates the permeation of high concentrations of Ca(2+), OH(-), and CO(3)               (2-) ions, leading to increased mineralization in this region. Comparison of the dentin-restorative interfaces shows that there is a dentin-mineral infiltration with the Biodentine, whereas polyacrylic and tartaric acids and their salts characterize the penetration of the GIC. A new type of interfacial interaction, "the mineral infiltration zone", is suggested for these calcium-silicate-based cements.
authors.affiliation: Biomaterials, Biomimetics and Biophotonics, King's College London Dental Institute, Floor 17 Tower Wing, Guy's Hospital, London Bridge, London SE1 9RT, UK.
authors.forename: A R
authors.initials: AR
authors.lastname: Atmeh
authors.forename: E Z
authors.initials: EZ
authors.lastname: Chong
authors.forename: G
authors.initials: G
authors.lastname: Richard
authors.forename: F
authors.initials: F
authors.lastname: Festy
authors.forename: T F
authors.initials: TF
authors.lastname: Watson
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D002126:Calcium Hydroxide / Q000737:chemistry; D003738:Dental Cements / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin / Q000737:chemistry* / Q000648:ultrastructure; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D036641:Microscopy, Fluorescence, Multiphoton; D017640:Silicates / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D017610:Calcium Compounds; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D017640:Silicates; D002126:Calcium Hydroxide; C031293:calcium silicate