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Content Gaps and Informational Quality of TikTok and Bilibili Videos on Pit and Fissure Sealing in China: A
Purpose:
To evaluate the disease-specific content coverage, overall quality, reliability, and transparency of Chinese-language short videos on pit and fissure sealing posted on TikTok and Bilibili.
Methods And Materials:
In this cross-sectional study, videos were retrieved from TikTok and Bilibili on December 20, 2025, using the Chinese search term '' (pit and fissure sealing). The first 150 results from each platform were screened, and 204 eligible videos were included. Overall quality, reliability, and transparency were assessed using the Global Quality Score (GQS), modified DISCERN (mDISCERN), and Journal of the American Medical Association (JAMA) benchmark criteria, respectively. A predefined disease-specific coding framework was used to evaluate content coverage. Group comparisons, Spearman's rank correlation, and multivariable ordered logistic regression were performed.
Results:
Benefits and indications were the most frequently covered domains, appearing in 87.75% and 78.92% of videos, respectively, whereas contraindications and cost were addressed in only 21.57% and 28.92%. The median GQS, mDISCERN, and JAMA scores were all 3.00. No significant differences in validated assessment scores were observed between TikTok and Bilibili. Videos uploaded by healthcare professionals, especially specialised healthcare professionals, achieved higher scores than those uploaded by individual users. Video duration showed weak positive correlations with validated assessment scores, whereas engagement indicators were not meaningfully associated with informational quality.
Conclusion:
Short videos on pit and fissure sealing provide moderately useful information, but content coverage remains incomplete and uneven. Greater participation by healthcare professionals and better access to balanced, trustworthy preventive information are needed on short-video platforms.
