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Purpose:To evaluate the content and quality of information on gummy smile offered by YouTube videos for patients. Materials and Methods:The keyword “gummy smile” was searched on Youtube. Videos were categorized as useful, misleading or personal experience based on their content. Videos were analysed to evaluate the and quality and scientific reliability of the information using Global Quality Scale(GQS) and DISCERN criteria; and the understandability of this information using a tailormade custom comprehensiveness index(CI). The source and user interaction information for each video were recorded. Results:A total of 98 videos were included for analysis. The videos of 64(65.3%) were considered as useful, 18(18.4%) provided by misleading information, and 16(16.3%) described personal experiences. The source of the videos was 66(67.3%) of dentists/specialist, 8(8.2%) of clinics/hospitals, 8(8.2%) of TV channel/news agencies and 16(16.3%) of were other. The GQS was
Türkmen et al. (Fri,) studied this question.