Prosthodontics & Occlusion · single question
Protrusive occlusal interference — which situation is involved?
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Correct answer: A. Posterior teeth contacting during protrusion
✓ A) Posterior teeth touching during protrusion is correct.
A protrusive interference occurs when posterior teeth contact during forward (protrusive) movement of the mandible, when ideally only the anterior teeth should guide (anterior guidance). This interferes with the protrusive pathway. Canine interference is a working-side lateral interference. Anterior open bite would prevent anterior guidance — the opposite problem.
A protrusive interference occurs when posterior teeth contact during forward (protrusive) movement of the mandible, when ideally only the anterior teeth should guide (anterior guidance). This interferes with the protrusive pathway. Canine interference is a working-side lateral interference. Anterior open bite would prevent anterior guidance — the opposite problem.
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