Which term describes a stable jaw position in which posterior teeth provide primary support and load distribution?

• A. Posterior Stability
• B. Anterior Guidance
• C. Group Function
• D. Mutually Protected Occlusion

Answer: (A)

Posterior stability describes a stable jaw position where the posterior teeth provide the primary support and distribute occlusal loads across the back teeth and their supporting structures. This concept emphasizes that, in centric relation or a habitual bite, the back teeth bear the majority of the chewing forces, helping to maintain vertical dimension and overall occlusal harmony.

Anterior guidance refers to how the front teeth guide jaw movements rather than where the load is carried in a static position. Group function describes a pattern where multiple posterior teeth share load during lateral movements, not the fundamental idea of a single stable load-bearing position. Mutually protected occlusion combines anterior guidance to protect the posterior teeth during excursions with posterior contacts in centric, but its focus is on movement protection rather than defining the primary static load-bearing role of the posterior dentition.