Effects of resin-based temporary filling materials against dentin demineralization

Abstract

This study investigated the in vitro anti-demineralization effects of resin-based temporary filling materials containing surface prereacted glass-ionomer (S-PRG) filler on dentin. Bovine root dentin specimens with a 3×3 mm experimental surface were divided into four treatment groups: DuraSeal (DU) as a control, S-PRG filler-free temporary material (S0), material containing 10% (S10) and 20% (S20) S-PRG filler. Each material was applied to 3×2 mm of the experimental surface, and the specimens were immersed in 8% methylcellulose gel demineralization system for one week at 37˚C. Mineral profiles and integrated mineral loss (IML) of lesions induced on the surface (3×1 mm) adjacent to the materials were computed by transversal microradiography. S10 and S20 yielded thick surface layers and shallow lesion bodies, with significantly lower IML than DU and S0 (p<0.05, Tukey's test). These findings indicate that temporary filling resin-based materials containing over 10% of S-PRG filler content have anti-demineralization effects on adjacent dentin.

Anti-demineralization effect of desensitizer containing copolymer and sodium fluoride on root dentin – a transverse microradiographic study

“…Together with an aluminum step wedge of 13 steps, ranging from 0 to 300 μm in thickness, the sections were radiographed on a high-resolution glass film plate (High-Resolution Plate, Konica-Minolta, Tokyo, Japan) with a nickel-filtered Cu-Kα source operated at 15 mA and 35 kV for 15 min (PW3830, Spectris, UK) . The radiographic images of the sections and aluminum step wedge were analyzed and the mineral content profiles of the lesions and IML values were measured by a microscope/video camera/microcomputer set-up and dedicated software (TMR2006 and 2012 Inspektor Research System, Amsterdam, Netherlands) [24,25].…”

Anti-demineralization characteristics of surface pre-reacted glass-ionomer (S-PRG) filler-containing varnishes

“…Dentin specimens were prepared as described 15,17,18) . The experimental procedures are outlined in Fig.…”

“…After 24 h, 70 mL of acid buffer (50 mM acetic acid, 1.5 mM CaCl 2, 0.9 mM KH2PO4, pH 5.0) were added to each container. All containers were maintained for one week at 37°C 15,17) .…”

Effects of pastes containing ion-releasing particles on dentin remineralization

“…Recently, the use of nano-HA, which is similar to the apatite crystal of dental enamel, has been proposed for the remineralization of early carious lesions 9,10) . A surface reaction-type pre-reacted glass-ionomer (S-PRG) filler forms a stable glass-ionomer phase by pre-reacting acidreactive glass-containing fluoride with polycarboxylic acid in the presence of water [11][12][13][14][15] , and it can release Al 3+ , BO3 3− , F − , Na + , SiO3 2− , and Sr 2+ . The release of SiO3 2− and Na + into the surrounding environment leads to buffering 16,17) ; in addition, Sr 2+ and F − are known to be strong inducers of remineralization of etched dentin and enamel surfaces 18,19) .…”