Sialolithiasis — NDEB AFK MCQ
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Correct answer: E — Submandibular gland (Wharton duct)
Approximately 80-90% of salivary gland sialoliths occur in the submandibular gland/Wharton duct. This is because: (1) the Wharton duct is long, tortuous, and has an upward course against gravity; (2) submandibular saliva is more viscous (mixed serous and mucous) with higher calcium and phosphate concentrations; and (3) the duct orifice is smaller than the duct diameter. Parotid stones account for approximately 10-20% and sublingual stones are rare.
Reference: Neville – Oral and Maxillofacial Pathology, 4th ed., 2016