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Excessive VDO Effects — NDEB AFK MCQ

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ModerateProsthodonticsExcessive VDO EffectsNDEB AFK

Which of the following correctly describes the effect of increased vertical dimension of occlusion (VDO) in a complete denture patient?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Muscle fatigue and pain from overstretching, clicking of denture teeth, and excessive freeway space

Excessive VDO (reduced freeway space) results in muscle fatigue and pain from the elevator muscles (masseter, temporalis, medial pterygoid) being overstretched. Clinical signs include muscle soreness, clicking of teeth during speech (insufficient rest space), patient discomfort, and inability to achieve a comfortable rest position. The patient may also develop a 'startled' or 'strained' facial appearance. In contrast, insufficient VDO (excessive freeway space) causes overclosure, collapsed facial profile, angular cheilitis, and deepened nasolabial folds.

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