Effect of denture base-resin with prereacted glass-ionomer filler on dentin demineralization

The demineralization of dentin was studied when placed adjacent to one of four experimental denture base‐resins. These experimental resins contained polymethylmethacrylate (PMMA) and 0, 5, 10, 20 or 30 wt% surface reaction‐type prereacted glass‐ionomer (S‐PRG) filler, respectively. A dentin thin‐section was sandwiched between these resins and subjected to demineralization for 1 wk. Microradiographic analyses showed that the mineral vol% of the surface was increased, and lesion formation was inhibited, in a dose–response relationship with the amount of S‐PRG filler. Moreover, the mineral loss decreased, by up to 60%, with an increasing amount of filler. These results indicate that denture base‐resins containing S‐PRG filler possess a substantial inhibition capability against demineralization, and this may thereby assist in preventing root caries of abutment teeth.