Sialolithiasis is most commonly obstructing which salivary duct?

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Study for the PANCE Precision Exam. Improve with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Sialolithiasis is most commonly obstructing which salivary duct?

Explanation:
Stones form when mineral salts precipitate in a duct of the salivary system. The most common site is the duct of the submandibular gland (Wharton's duct) because its saliva is relatively viscous and mucus-rich, with higher mineral content, and the duct path runs uphill toward the floor of the mouth. This combination promotes stasis and crystallization, making obstruction by a stone more likely there. In contrast, the parotid gland’s duct (Stenson's) carries more watery, serous saliva and drains more directly, so stones are less common in that duct. Minor salivary gland ducts (Rivinus) are even less typically affected.

Stones form when mineral salts precipitate in a duct of the salivary system. The most common site is the duct of the submandibular gland (Wharton's duct) because its saliva is relatively viscous and mucus-rich, with higher mineral content, and the duct path runs uphill toward the floor of the mouth. This combination promotes stasis and crystallization, making obstruction by a stone more likely there. In contrast, the parotid gland’s duct (Stenson's) carries more watery, serous saliva and drains more directly, so stones are less common in that duct. Minor salivary gland ducts (Rivinus) are even less typically affected.

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