title: Influence of air-abrasion executed with polyacrylic acid-Bioglass 45S5 on the bonding performance of a resin-modified glass ionomer cement.
abstract: The aim of this study was to test the microtensile bond strength (μTBS), after 6 months of storage in PBS, of a resin-modified glass ionomer cement (RMGIC) bonded to dentine pretreated with Bioglass 45S5 (BAG) using various etching and air-abrasion techniques. The RMGIC (GC Fuji II LC) was applied onto differently treated dentine surfaces followed by light curing for 30 s. The specimens were cut into matchsticks with cross-sectional areas of 0.9 mm(2). The μTBS of the specimens was measured after 24 h or 6 months of storage in PBS and the results were statistically analysed using two-way anova and the Student-Newman-Keuls test (α = 0.05). Further RMCGIC-bonded dentine specimens were used for interfacial characterization, micropermeability, and nanoleakage analyses by confocal microscopy. The RMGIC-dentine interface layer showed no water absorption after 6 months of storage in PBS except for the interdiffusion layer of the silicon carbide (SiC)-abraded/polyacrylic acid (PAA)-etched bonded dentine. The RMGIC applied onto dentine air-abraded with BAG/H(2)O only or with BAG/PAA-fluid followed by etching procedures (10% PAA gel) showed no statistically significant reduction in μTBS after 6 months of storage in PBS. The abrasion procedures performed using BAG in combination with PAA might be a suitable strategy to enhance the bonding durability and the healing ability of RMGIC bonded to dentine.
authors.affiliation: Biomaterials, Biomimetics & Biophotonics Department, King's College London Dental Institute at Guy's Hospital, King's Health Partners, London, UK. salvatore.sauro@kcl.ac.uk
authors.forename: Salvatore
authors.initials: S
authors.lastname: Sauro
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Watson
authors.forename: Ian
authors.initials: I
authors.lastname: Thompson
authors.forename: Manuel
authors.initials: M
authors.lastname: Toledano
authors.forename: Cesare
authors.initials: C
authors.lastname: Nucci
authors.forename: Avijit
authors.initials: A
authors.lastname: Banerjee
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins; D000328:Adult; D020906:Air Abrasion, Dental / Q000379:methods; D002516:Ceramics; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005898:Glass; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D018613:Microscopy, Confocal; D008963:Molar; D012117:Resins, Synthetic / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D055815:Young Adult
chemical_list: D000180:Acrylic Resins; D017220:Dentin-Bonding Agents; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D012117:Resins, Synthetic; C425330:bioactive glass 45S5; C006903:carbopol 940