Here is a handout I created that addresses dysphagia, aspiration, aspiration pneumonia, and oral cares (dental hygiene) in a Q&A format. It covers easy to understand explanations, the importance of oral cares, and how to do oral cares on (a) a person who cannot perform oral hygiene, (b) someone on a restricted or dysphagia diet, and (c) someone with resisting behavior (i.e. refusing to open mouth, biting, kicking) including an individual with dementia.
This handout also addresses tube feeding, who is at risk for aspiration pneumonia, and prevention of aspiration pneumonia.
Included is detailed references and links on where to find more information.