Prosthodontics & Occlusion · single question
Before performing a restoration on tooth #9, which mandibular movement must be checked?
Show answer and explanation
Correct answer: C. Protrusive
- A. Skipping the excursive check is a common cause of restorative failure in the anterior.
- B. Non-working-side contacts should be absent in ideal mutually protected occlusion.
- C. Correct. Maxillary central incisors provide anterior guidance during protrusion. A restoration that is over-contoured on the lingual will create a protrusive interference, causing fracture, discomfort or muscle symptoms.
- D. Lateral working movements are guided primarily by the canines, not the central incisors.
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