The study compared the effectiveness of three teaching methods on the oral health status of high school children. The study population of 791 school children selected from three different schools was randomly allocated to one of three intervention groups: (i) Webinar group (Online presentation)—260 subjects, (ii) Face to Face lecture using PowerPoint presentation (F2F PP group)—261 subjects and (iii) Control group (Only lecture)—270 subjects. Subjects from the Webinar group and F2F PP group received oral health education at an interval of 15 days starting from baseline. Subjects from the control group received oral health education only at baseline. Oral Hygiene Index (OHI) and Gingival Index (GI) were measured at baseline, at 1 month, 2 months’ and 3 months’ interval. OHI and GI showed a significant reduction (P = 0.001) in the Webinar group and F2F PP group; However, in the control group, OHI and GI reduced from baseline till second month and showed an increase at 3 months’ interval. F2F PP group showed a maximum reduction in OHI and GI followed by the Webinar group. It can be concluded that F2F PowerPoint-based oral health education was most effective followed by the webinar method.

中文翻译：

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网络研讨会，PowerPoint演示文稿和讲座作为学龄儿童口腔健康教育干预措施的比较评估：一项随机对照试验

研究比较了三种教学方法对高中生儿童口腔健康状况的有效性。来自三所不同学校的791名学童的研究人群被随机分配到三个干预组之一：（i）网络研讨会组（在线演示）— 260名受试者，（ii）使用PowerPoint演示的面对面演讲（F2F PP组） -261名受试者和（iii）对照组（仅讲座）-270名受试者。网络研讨会组和F2F PP组的受试者从基线开始每隔15天接受一次口腔健康教育。对照组的受试者仅在基线时接受了口腔健康教育。在基线，间隔1个月，2个月和3个月时测量口腔卫生指数（OHI）和牙龈指数（GI）。OHI和GI显着降低（P = 0.001）在网络研讨会组和F2F PP组中；然而，对照组的OHI和GI从基线到第二个月减少，并在3个月的间隔内增加。F2F PP组的OHI和GI降低最大，其次是Webinar组。可以得出结论，基于网络研讨会方法的基于F2F PowerPoint的口腔健康教育是最有效的。