During a right lateral excursion, which teeth exhibit premature contacts on the non-working side according to the described interference?

During a right lateral excursion, which teeth exhibit premature contacts on the non-working side according to the described interference?

• A. Left molars
• B. Right molars
• C. Anterior teeth
• D. None

Answer: (A)

During a right lateral excursion, the mandible moves to the right and the left side becomes the non-working side. In this scenario, premature contacts described on the non-working side point to the left posterior teeth—the left molars—as the ones making contact earlier than they should. The working side teeth (the right side) are the ones guiding the movement and are not expected to encounter premature contacts on the non-working side. Anterior teeth can influence guidance, but they are not the typical source of this non-working side interference described here. So the left molars are where the premature contacts occur.

During a right lateral excursion, the mandible moves to the right and the left side becomes the non-working side. In this scenario, premature contacts described on the non-working side point to the left posterior teeth—the left molars—as the ones making contact earlier than they should. The working side teeth (the right side) are the ones guiding the movement and are not expected to encounter premature contacts on the non-working side. Anterior teeth can influence guidance, but they are not the typical source of this non-working side interference described here. So the left molars are where the premature contacts occur.