Study of a new mulch-functional restorative material having a bio-actibility.

为了阐明在树脂改性玻璃离子水泥（RMGIC）中添加硅化（S)和非硅化(U)球形二氧化硅填料以及粉液比对以下方面的影响：1）牙腔和特氟龙模具修复体的早期边缘间隙宽度；2)V类牙腔修复体的间隙形成；3)水泥的抗压强度。分别加入5% wt.%的S和10% wt.%的U对RMGIC粉末进行改性，使粉液比提高到4.8。随着粉液比（3.0 ~ 4.4 ~ 4.8）和抗压强度（111 ~ 150 ~ 170 MPa, p<0.05）的增加，修复体的边缘间隙和腔体适应性得到改善。粉液比与1)牙腔边缘间隙宽度百分比、2)无间隙牙/水泥界面百分比、3)特氟龙模具边缘间隙宽度百分比和4)水泥抗压强度之间存在极显著相关系数。

To clarify the effects of addition of silanized (S) and unsilanized (U) spherical silica filler to resin-modified glass ionomer cement(RMGIC) and of powder-liquid ratio on 1) the early marginal gap-width of restorations in both tooth cavities and Teflon molds, 2) the gap-formation of restorations in Class V cavities, and 3) the compressive strength of the cement. RMGIC powder was modified by adding 5 and 10 wt.% of powder respectively, of S and U, and then the powder-liquid ratio was increased up to 4.8. Marginal gap and cavity adaptation of the restorations improved with increasing powder-liquid ratio (3.0 to 4.4-4.8) and compressive strength increased (111 to 150-170 MPa, p<0.05). Highly significant correlation coefficients were found for the relationships between powder-liquid ratio and 1) percentage of marginal gap width in the tooth cavity, 2) gap-free tooth/cement interfaces, 3) percentage of marginal gap widths in the Teflon mold and 4) compressive strengths of the cements.