Older persons are at risk of chronic diseases of the mouth, including dental infections (e.g., caries, periodontitis), tooth loss, benign mucosal lesions, and oral cancer. Other common oral conditions in this population are xerostomia (dry mouth) and oral candidiasis, which may lead to acute pseudomembranous candidiasis (thrush), erythematous lesions (denture stomatitis), or angular cheilitis. Xerostomia caused by underlying disease or medication use may be treated with over-the-counter saliva substitutes. Primary care physicians can help older patients maintain good oral health by assessing risk, recognizing normal versus abnormal changes of aging, performing a focused oral examination, and referring patients to a dentist, if needed. Patients with chronic, disabling medical conditions (e.g., arthritis, neurologic impairment) may benefit from oral health aids, such as electric toothbrushes, manual toothbrushes with wide-handle grips, and floss-holding devices.