title: Interfacial layer characterization in dental composite.
abstract: Nowadays, dental resins find increasing use by practitioners. However, photopolymerization of such resins is limited to a so-called 'depth of cure'. To face this problem, dentists superimpose resin layers of limited depth. This technique raises the problem of the quality of interlayer. This paper aims at screening different cases of adhesion at the interface. Shear strength of such interfacial layers is tested in shear mode in various conditions (with or without an oxygen-inhibited layer, or contaminated by saliva or water). Unexpectedly, the presence of an oxygen-inhibition on the first layer, as assessed using micro-Raman spectroscopy, induces higher shear strength. In this case, a cohesive break occurs while an adhesive one is observed in all the other cases.
authors.affiliation: Laboratoire de Chimie et de Physique des Hauts Polymères, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
authors.forename: D
authors.initials: D
authors.lastname: Truffier-Boutry
authors.forename: E
authors.initials: E
authors.lastname: Place
authors.forename: J
authors.initials: J
authors.lastname: Devaux
authors.forename: G
authors.initials: G
authors.lastname: Leloup
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003793:Dental Restoration, Permanent; D008422:Materials Testing / Q000379:methods*; D033081:Shear Strength; D013059:Spectrum Analysis, Raman
chemical_list: D003188:Composite Resins