Oral health is known to impact on the quality of life in older persons (Lindmark et al., 2020;McGrath & Bedi, 1991;van de Rijt et al., 2021), and oral health is experienced as central for the sense of self-esteem and thus is perceived as a priority by older persons (McKenzie-Green et al., 2009). Importantly, poor oral health is associated with malnutrition (Lindroos et al., 2019;van Lancker et al., 2012) and is a risk factor for aspiration pneumonia among older persons (van der Maarel-Wierink et al., 2011), which in turn increases the risk for death (Welte et al., 2012). However, a recent review (Manger et al., 2017) shows strong evidence that the incidence of pneumonia can be reduced by regular oral hygiene interventions, that is through the use of chlorhexidine in mouthwash or gel among older persons.Another review (van der Maarel-Wierink et al., 2013) concludes that tooth brushing after each meal, cleaning dentures once a day and professional oral health care once a week reduce the incidence of aspiration pneumonia among frail older persons.