Masking ability of layering techniques combined with white or yellow opaquers on a dark background.

Researchers compared composite layering techniques with white or yellow opaques for masking discolored teeth. The three-layer technique (opaque plus dentin and enamel composite) produced the best color match, with white opaques performing better than yellow.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.