Lingual Flange Border Moulding — NDEB AFK MCQ

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ModerateProsthodonticsLingual Flange Border MouldingNDEB AFK

When taking a mandibular impression for a complete denture, the patient is asked to protrude and retract the tongue. This border-moulding action shapes which area of the impression?

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Correct answer: C — Lingual flange in the sublingual region

Tongue protrusion and retraction during border moulding shapes the lingual flange of the mandibular complete denture impression, particularly in the sublingual region. These tongue movements activate the mylohyoid, genioglossus, geniohyoid, and intrinsic tongue muscles, determining the functional depth and extent of the lingual flange. Over-extension of the lingual flange results in denture dislodgement during tongue movement.

Reference: Zarb – Prosthodontic Treatment for Edentulous Patients, 13th ed., 2013