Which arrangement achieves bilateral balance or group function for posterior teeth?

• A. Establish vertical dimension only.
• B. Arrange posterior teeth to achieve bilateral balance or group function.
• C. Place teeth randomly without occlusal consideration.
• D. Use only anterior teeth for occlusion.

Answer: (B)

The goal here is to set the posterior teeth so that they contact on both sides during function. Bilateral balance means there are simultaneous contacts on both sides in centric and the eccentric movements, which helps stabilize the denture during chewing and lateral movements. Group function is when the working-side posterior teeth share the occlusal load, also stabilizing the denture without relying on contacts on the nonworking side. This arrangement distributes forces across multiple teeth, reducing tipping, rocking, and wear. Establishing vertical dimension alone doesn’t ensure any occlusal contacts, placing teeth randomly ignores how they meet, and using only anterior teeth leaves the posterior support missing. Therefore, arranging the posterior teeth to achieve bilateral balance or group function best achieves stable, functional occlusion.