Determination of chemical species of fluoride during uptake mechanism of glass-ionomer cements with NMR spectroscopy.

Objective: The aim of the present study was to determine the chemical species formed inside glass-ionomer cements after fluoride uptake and to investigate the depth of penetration of fluoride ions within the cement matrix.

Methods: An experimental fluoride-free glass with composition 2SiO-AlO-CaO was produced. The glass powder was mixed with aqueous poly(acrylic acid) (PAA), and allowed to set.

Influence of external energy sources on the dynamic setting process of glass-ionomer cements.

Objective: To evaluate the influence of external energy sources on the dynamic setting process of glass-ionomer restorative materials.

Methods: Eighteen brands of GIC were studied: Bioglass R (Biodinâmica; G1), Chemfil Rock (Dentsply; G2), Equia Forte (GC; G3), Gold Label 2 (GC; G4), Gold Label 9 (GC; G5), Glass Ionomer Cement Type II - (Shofu; G6), Ionglass R (Maquira; G7), Ion Z (FGM; G8), Ionomaster (Wilcos; G9), Ionofil Plus (Voco; G10), Ionostar Plus (Voco; G11), Ketac Molar easymix (3M ESPE; G12), Magic Glass R (Vigodent; G13), Maxxion R (FGM; G14), Riva Self Cure (SDI; G15), Vidrion R (SS White; G16), Vitro Fil R (Nova DFL; G17) and Vitro Molar (Nova DFL; G18). LED, halogen light or ultrasound (n=20 for each set) applied for 30s was used to activate setting, and a control group of each material was allowed to set without activation.

Positive correlation between fluoride release and acid erosion of restorative glass-ionomer cements.

Objective: The aim of this study was to determine whether there is a correlation between acid erosion and fluoride release of conventional glass ionomer cements.

Methods: Ten specimens for each material were prepared for fluoride release tests and five for acid erosion tests separately. After placed in pH cycling solution, concentration of fluoride was measured by a fluoride-ion selective electrode each day for 15 days.

Resistance to degradation of resin-modified glass-ionomer cements dentine bonds.

Objective: To evaluate the effect of EDTA pre-treatment of dentine on resistance to degradation of the bond between dentine and resin-modified glass-ionomer cements.

Methods: Sixty non-carious human molars underwent cavity preparations. Teeth were restored with Fuji II LC or Vitremer.

The use of CVD diamond burs for ultraconservative cavity preparations: a report of two cases.

Unlabelled: During the past decades, scientific developments in cutting instruments have changed the conventional techniques used to remove caries lesions. Ultrasound emerged as an alternative for caries removal since the 1950s. However, the conventional technology for diamond powder aggregation with nickel metallic binders could not withstand ultrasonic power.