The spread of dental misinformation online about teeth whitening is a problem that may be an increasing threat to the oral health of your patients, according to a study recently published in the European Journal of Dental Education.
This study highlights the need for dental professionals to share accurate digital content, the authors wrote.
“This comprehensive analysis of dental bleaching content on YouTube reveals a troubling disconnect between scientific validity and popular engagement,” wrote the authors, led by Letícia de Azevedo Lima Silva of the University of Pernambuco in Brazil (Eur J Dent Educ, February 23, 2026).
This study aimed to evaluate the quality, reliability, and educational value of tooth bleaching videos on YouTube, with a focus on differences between viewer engagement and scientific rigor. In December 2024, the researchers conducted an observational study analyzing videos posted within the previous year, selected using the most searched tooth bleaching terms on Google Trends, the team wrote.
Each video was assessed for engagement metrics, source (healthcare professional or other), audiovisual quality, reliability (1 to 5), usefulness (0 to 5), and overall quality (1 to 5). The modified DISCERN tool and the Global Quality Score were used to evaluate reliability and overall educational quality. Of the 366 videos initially identified, 43 met the inclusion criteria after exclusions were applied.
The reliability analysis showed differences across search terms, with “bleaching teeth” videos performing the worst: 30.2% (n = 13) scored 2, and none scored greater than or equal to 4. “Types of bleaching” videos demonstrated moderate reliability, with 30.2% scoring 3, while only “bleaching toothpaste” content reached the highest reliability score, with 4.7% scoring 5.
Overall, 44.2% of all videos scored less than or equal to 2 for reliability, and low educational value was common, particularly for “bleaching teeth” (30.2% scoring 0) and “bleaching toothpaste” (11.6% scoring 0), they wrote.
In contrast, “types of bleaching” videos more often achieved moderate to high usefulness, with 11.6% scoring 2 and another 11.6% scoring 5, while intermediate scores of 3 were less frequent (4.7% and 7%). Engagement was highest for high audiovisual quality videos, especially those produced by nonhealth professionals (approximately 4,500 interactions versus 1,000 for moderate quality), whereas health professional videos generated far lower engagement (about 1,000 for high quality and 100 for moderate), indicating that engagement was driven more by production quality than source credibility.
Nevertheless, the study had limitations. The analysis only included videos in Portuguese, which may limit how the findings apply to other cultural settings, the authors added.
“Healthcare platforms and regulatory bodies must collaborate to develop strategies that prioritize quality and accuracy in dental health communication,” they concluded.
