Diminished salivary output leading to xerostomia and caries is associated with which condition?

• A. Sjogren's syndrome
• B. Rheumatoid arthritis
• C. Phenytoin use
• D. Sugar-containing medications

Answer: (A)

Diminished saliva that leads to dry mouth and more tooth decay occurs most characteristically with Sjogren's syndrome. This autoimmune condition targets the body's exocrine glands, especially the salivary and lacrimal glands, causing reduced saliva production and resulting in xerostomia. Saliva normally helps buffer acids, remineralize teeth, and wash away food particles; when its flow drops, the mouth becomes more acidic and less able to defend against caries and infections. Sjogren's is common in middle-aged individuals and often presents with dry eyes as well, reflecting the broader exocrine gland involvement. While other conditions or medications can influence oral health, the strong, direct link to reduced salivary output and resultant caries points to Sjogren's syndrome.