What is indicated by the presence of simultaneous group function in a fixed bridge?

The presence of simultaneous group function in a fixed bridge indicates a specific occlusal dynamic where multiple posterior teeth come into contact during lateral excursions of the mandible, rather than just a single tooth or set of teeth. This typically manifests when there is a deficiency in anterior guidance, which would normally direct the occlusal relationship during lateral movements.

In this scenario, simultaneous group function may lead to excessive force being distributed among the posterior teeth, which can create wear or even damage to those teeth over time. Thus, the simultaneous contact of multiple posterior teeth suggests that there might be an underlying issue with the functioning or alignment of these teeth, making it clear that they may not be effectively distributing occlusal forces as intended.

While the other options mention different aspects of occlusal relationships, such as anterior guidance and occlusal relationships being proper, the consistent contact of several posterior teeth in a group function scenario highlights potential concerns with the integrity or function of those posterior structures specifically.