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https://www.selleckchem.com/products/2-Methoxyestradiol(2ME2).html nt mechanical polishing protocol could increase clinical performance and extend the lifespan of these appliances. Furthermore, a polishing protocol by means of a simple technique could be employed by patients in a home environment. To examine the acid resistance of experimental toothpaste containing different wt% of surface pre-reacted glass-ionomer (S-PRG) filler. Hydroxyapatite (HAP) pellets were treated with toothpaste containing 0, 1, 5, 10, 20, or 30 wt% S-PRG filler for 5 minutes. A demineralization and remineralization cycle was repeated for 7 days. The demineralized depths of the pellets were measured using a surface roughness analyzer. The crystallinity of both HAP and dicalcium phosphate dehydrate (DCPD) after the S-PRG treatment was measured by a powder X-ray diffraction (XRD) analysis. Fluoride gel (9,000 ppmF) was used for comparison. The demineralizd depth decreased with increases in the S-PRG filler concentration. The demineralized depth with the 30 wt% S-PRG treatment (4.6 µm ± 2.0) was slightly greater than that with the fluoride gel (3.3 µm ± 0.5), but not significantly different (P< 0.05). However, significant differences were observed in demineralized depths between the fluoride gel and the other wt% of S-PRG tested (P< 0.05). In the XRD analysis, no crystallinity changes were noted in HAP or DCPD after the S-PRG or fluoride gel treatments. The formation of calcium fluoride was not detected in any treatment group. The results demonstrated the effectiveness of the toothpaste containing 30 wt% S-PRG filler for inhibiting the demineralization of HAP pellets. However, the toothpaste containing S-PRG filler prevented demineralization less effectively than the fluoride gel. The results demonstrated the effectiveness of the toothpaste containing 30 wt% S-PRG filler for inhibiting the demineralization of HAP pellets. However, the toothpaste containing S-PRG filler prevented demineralizati

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