title: Surface reactions of adhesives on dentin.
abstract: The purpose of this study was to characterize changes in the surface chemistry of dentin following various adhesive treatments. The coronal parts of sound freshly extracted third molars were cross-sectioned over the pulp chambers, each producing a pair of dentin samples which were polished to 600 grit and cleaned with 3% H2O2. The first sample of each pair was used as a control, while the second one was subjected to one of the following adhesive treatments: (a) Gluma Cleanser, (b) Tenure Conditioner, (c) Scotchprep, (d) Gluma Cleanser/Gluma Primer, (e) Tenure Conditioner/Tenure Solution A&B, or (f) Scotchprep/Scotchbond 2 Adhesive. The treated samples paired with their respective controls were studied by small-area ESCA spectroscopy. Three areas of 1.0 mm in diameter randomly chosen on each sample were analyzed by survey and C1s, O1s, N1s high-resolution spectra. The samples from groups d, e, and f were additionally subjected to argon-ion-depth profiling of the uppermost 2-nm layer at 0.5-nm intervals. According to the results, treatment modes a, b, and c caused the reduction of carbonates and increased the -NH/NH2 ratio. Treatments a and c increased the alcohol groups, while treatments b and c increased the carbonyl and ether groups. All these changes were in comparison to the reference dentin specimens. Dentin treatment with d, e, and f induced a complex in depth distribution of the C, N, O binding states. The energy shifts detected do not indicate primary bonding of the tested adhesives to the dental substrate.
authors.affiliation: Research Center for Biomaterials, Terpsithea, Greece.
authors.forename: G
authors.initials: G
authors.lastname: Eliades
authors.forename: G
authors.initials: G
authors.lastname: Palaghias
authors.forename: G
authors.initials: G
authors.lastname: Vougiouklakis
mesh_terms: D000269:Adhesives; D001840:Dental Bonding; D003736:Dental Cavity Lining; D003738:Dental Cements; D003804:Dentin / Q000187:drug effects*; D006801:Humans; D013499:Surface Properties
chemical_list: D000269:Adhesives; D003738:Dental Cements