Which type of restoration cannot be performed on posterior teeth?

Pinledges are typically not considered suitable for posterior teeth restorations. This is largely due to the specific design and mechanical requirements associated with pinledges, which are more appropriate for anterior teeth. The structure and occlusal forces present in posterior teeth necessitate a different approach to restoration to ensure durability and functionality.

In contrast, three-quarter, modified three-quarter, and seven-eighths restorations can effectively be used on posterior teeth. These types of restorations are designed to provide adequate retention and resistance to the forces encountered during chewing, making them more feasible for the posterior region where the stresses are greater.