Oral health impacts the physical and psychological comfort and the quality of life of clients in long-term care. The programs to prevent or delay disability care advocated under Taiwan's Long-Term Care Plan 2.0 address oral health care, highlighting the importance of oral health care for clients in long-term care. This article discusses three concepts of oral health care for clients who are in long-term care. These include: the relationship between oral conditions and general health, oral care and dysphagia, and oral health and hydration. In addition, oral health care strategies for long-term care facilities are discussed. It is hoped that this article will encourage long-term care practitioners to pay close attention to the issue of oral health and to implement appropriate oral health care for their long-term-care clients.