Australian Dental Council (ADC) Test 2026 – 400 Free Practice Questions to Pass the Exam

Xerostomia, commonly known as dry mouth, can be caused by various factors, but the submandibular sialolith is the least likely to contribute to this condition compared to the other options.

Sialolithiasis, or the formation of stones in the salivary glands, specifically in the submandibular gland, can lead to acute sialadenitis or blockage of saliva flow when the stone obstructs the duct. While it can influence salivary gland function and potentially cause dry mouth symptoms, the primary effect is often localized discomfort and swelling rather than a systemic condition leading to widespread xerostomia.

In contrast, Sjögren's syndrome is an autoimmune disorder characterized by the destruction of salivary and lacrimal gland tissue, leading to a significant and chronic reduction in saliva production and resulting in xerostomia. Emotional reactions can also trigger a fight-or-flight response, leading to reduced salivation temporarily, although this is typically less pronounced than chronic conditions. Antidepressant drugs are well-known to have xerostomic side effects due to their anticholinergic properties, which inhibit saliva production directly.

Thus, when considering the mechanisms and severity of each condition, a submandibular sialolith is the