Poor oral health is a major public health problem, owing to its high prevalence and incidence around the world. As with other diseases, the greatest burden of poor oral health is upon disadvantaged and socially marginalized populations. Oral health diseases includes tooth decay, tooth erosion, gum disease, and oral cancer as well as facial and dental injuries. These diseases continue to be widespread despite being highly preventable. Simple measures such as improved oral hygiene practices, improved diet, use of and access to fluoride, along with attending the dentist for regular check-ups to identify problems early, can all help to prevent, or at least reduce, the burden of oral diseases.