Prosthodontics & Occlusion · single question
In Class II occlusion, anterior guidance during protrusive/lateral movements is provided primarily by:
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Correct answer: A. Lingual inclination (retroclination) of upper anterior teeth
- A. ✅ Correct. In Class II occlusion, the upper anterior teeth are often retroclined (lingually inclined). The lingual surfaces of these upper teeth provide the guiding contact surface during protrusive and lateral mandibular movements — anterior guidance.
- B. ❌ Posterior teeth should be DISCLUDED by anterior guidance during protrusion — they do not provide guidance.
- C. ❌ Labial inclination of lower teeth reduces upper-lower contact, not enhances guidance.
- D. ❌ Canine guidance is a specific lateral movement scheme; it doesn't describe the general Class II anterior guidance mechanism.
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