Prosthodontics & Occlusion · single question

In bilaterally balanced articulation for complete dentures, if the mandible shifts to the LEFT during closure (left = working side), which contact pattern helps maintain balance on the RIGHT (non-working/balancing) side?

  1. Buccal cusps of the maxillary (upper) posterior teeth contact the buccal cusps of the mandibular (lower) posterior teeth on the balancing side
  2. Only the lingual cusps of the maxillary teeth contact the central fossae
  3. No tooth contact should occur on the balancing side at all
  4. Only the anterior teeth contact on the balancing side
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Correct answer: A. Buccal cusps of the maxillary (upper) posterior teeth contact the buccal cusps of the mandibular (lower) posterior teeth on the balancing side

In classic bilateral balanced occlusion, the non-working (balancing) side is designed to maintain simultaneous contact — typically the buccal cusp of the maxillary tooth contacting the buccal cusp incline of the mandibular tooth — so that forces are distributed across both sides of the denture rather than tipping it off the working side.

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