In rapidly aging societies, it is commonly found that the limited number of remaining teeth in elders results in chewing difficulties that cause health problems and malnutrition. Surprisingly, even the latest high-tech oral medical care achieves health maintenance results that are inferior to those regularly achieved by healthy natural teeth. Oral health issues are particularly serious in rural areas. The literature supports a close association between oral hygiene and general health. Because oral microorganisms are known to cause infections and inflammation reactions, people with poor oral hygiene often have high incidences of periodontal disease and tooth loss and an even higher prevalence of cardiometabolic-related chronic diseases, poorer life quality, and higher mortality than their peers with better oral hygiene (Ma et al., 2017; Tsai et al., 2015; World Health Organization, 2018). Although promoting oral hygiene may be done on a minimal budget and with high efficacy, many people retain improper oral-hygiene concepts and behaviors. For instance, many do not recognize the relationship between real teeth and general health, brush their teeth for inadequate durations, and/or apply improper methods. Furthermore, many do not make use of the regular dental cleaning resources available through the National Health Insurance program, leading to poor oral hygiene care outcomes such as tooth decay in school-age children, periodontal disease and tooth loss in adulthood, and the current average of fewer than 20 real teeth in adults 65~80 years of age. All of these poor oral-hygiene realities lead to Taiwan falling far short of WHO oral-health-related goals. Based on the perspective of prevention and health promotion, this column presents the important role of the nursing profession in improving the quality of oral hygiene care through the three critical phases of life: school age, active adulthood, and elderly adulthood. We look to advance national oral hygiene in Taiwan to a standard exceeding that of the World Health Organization in order to demonstrate the practical benefit of Taiwan's two-decade-long National Health Insurance system.