Effects of time and concentration of sodium ascorbate on reversal of NaOCl-induced reduction in bond strengths.

The use of NaOCl as an endodontic irrigant lowers the bond strength of resin cements but this can be reversed by the use of 10% sodium ascorbate for 10 min. The objective of this study was to evaluate the effect of time and concentration of ascorbate at restoring the bond strength. Group 1 roots were prepared using 0.

Activation of gelatinolytic/collagenolytic activity in dentin by self-etching adhesives.

Mild acids are known to activate dentin matrix metalloproteinase (MMPs). All self-etching dental adhesives are acidic (pH 1.5-2.

Evaluation of the effect of water-uptake on the impedance of dental resins.

Unlabelled: Electrical impedance spectroscopy (EIS) offers a quantitative method of measuring the stability of resin films in aqueous solution over time.

Purpose: The purpose of this study was to measure the EIS of five experimental dental adhesive films (ca. 17 microm thick) of increasing hydrophilicity (ranked by their Hoy's solubility parameters), and how much these values change over 3 weeks in aqueous buffer.

Effects of resin hydrophilicity on water sorption and changes in modulus of elasticity.

Unlabelled: As acidic monomers of self-etching adhesives are incorporated into dental adhesives at high concentrations, the adhesive becomes more hydrophilic. Water sorption by polymers causes plasticization and lowers mechanical properties. The purpose of this study was to compare the water sorption and modulus of elasticity (E) of five experimental neat resins (EX) of increasing hydrophilicity, as ranked by their Hoy's solubility parameters and five commercial resins.