OMNICHROMA BLOCKER is indicated for: Preventing shade-matching interference in large Class III and Class IV restorations Masking amalgam staining OMNICHROMA BLOCKER is a supplementary material that can be used in conjunction with OMNICHROMA as a lingual layer to prevent shade-matching interference in these cases. OMNICHROMA BLOCKER can also be used to mask staining, or to reconstruct a highly opaque tooth. Masking dark dentition and dentin Reconstructing a highly opaque tooth