Which combination of muscles is associated with pain deferral for maxillary posterior teeth?

• A. Anterior temporalis
• B. Posterior temporalis and upper superficial masseter
• C. Middle temporalis
• D. Lower superficial masseter

Answer: (B)

Pain deferral in the maxillary posterior teeth happens when the muscles that secure and stabilize the back of the bite are active, shifting load toward the posterior teeth and reducing perceived pain signals from those teeth. The combination that best achieves this involves the posterior fibers of the temporalis and the upper superficial portion of the masseter. The posterior temporalis contributes to strong, posterior bite closure and stabilization of the molar region, while the upper superficial masseter provides powerful closing force with a focus on the posterior dental arch. Together, they promote a posterior-loading pattern that can mask or delay pain in the maxillary posterior teeth during clenching or bracing.

Other muscle groups listed are less consistently linked to this posterior-focused bite stabilization. The anterior and middle portions of the temporalis are more involved in anterior guidance and different jaw movements, and the lower portion of the masseter tends to influence other aspects of mandibular closure rather than preferentially supporting the posterior bite.