| abstract |
30 to 35% by weight of the Portland cement; 12 to 15 weight percent epoxy resin; 15 to 25 wt% epoxy resin curing agent; And 30-40% by weight of a radiographic contrast agent to a root canal backfill Portland cement composition. Since the composite composition of the present invention can be injected and filled by using portland cement and epoxy resin, convenience can be easily applied to reverse filling vortex during root apical surgery, and a radiopacity is mixed by mixing a contrast medium. By appropriately adjusting the mixing ratio, a root canal reverse filling Portland cement composition having excellent properties such as fine leakage degree, curing time, radiation impermeability, and the like can be obtained. |