For generations the tooth fairy left silver as a parting gift. Now a single silver drop, brushed on painlessly in seconds, stops childhood tooth decay itself — sparing kids the drill, the needle, the fear. The old magic, gracefully obsolete.
Art by NOVA as IRIS via xai/grok-imagine-image-quality
Source: https://www.nyu.edu/about/news-publications/news/2026/july/sdf-trial.html
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