Xerostomia is best defined as

• A. Loss of saliva production leading to a dry mouth
• B. Excessive saliva production
• C. Gum inflammation
• D. Tooth enamel erosion

Answer: (A)

Xerostomia is the condition of a dry mouth caused by reduced saliva production or flow. Saliva keeps the mouth moist, helps with swallowing and speaking, neutralizes acids, and protects teeth. When saliva is diminished, the mouth feels dry and you may have trouble with eating, speaking, or swallowing, and there’s a greater risk of tooth decay and mouth irritation. The other descriptions describe having too much saliva, gum inflammation, or enamel erosion, which are not what xerostomia means.