Title: Clinical Use of Silver Fluoride: Quality Evaluation of YouTube™ Educational Content

Background: Silver fluoride (SF) is an effective, minimally invasive dental caries treatment, but the quality, reliability, and adherence to manufacturer’s instructions for use (IFU) in YouTube™ videos on SF usage remain uncertain. Aim: Evaluate the reliability and quality of YouTube ^TM videos on the clinical usage of SF and adherence to their IFU. Design: A cross-sectional analysis of 78 YouTube ^TM videos was conducted, for reliability (modified DISCERN tool), source quality (Journal of American Medical Association benchmark criteria), production quality (Audio-Visual Quality tool), content usefulness (Total Content Evaluation index) and adherence to manufacturer instructions (IFU Adherence Evaluation tool). Correlations between video characteristics and engagement metrics ere explored. Results: Videos had moderately high reliability (median mDISCERN score: 4 and IQR: 3–4) and usefulness (median TCE score: 5 and IQR: 4–6), but source quality was lower (median JAMA score: 2 and IQR: 2–3). Adherence to IFU varied between SF brands, with videos demonstrating at least 60% of steps. Dental professionals were the most frequent video producers, but no significant quality differences were observed between sources. Conclusion: YouTube ^TM videos could be a learning resource for SF usage, although stricter guidelines are needed to ensure they convey accurate information.