What is the primary function of marginal ridges?

The primary function of marginal ridges is to support the proper function during chewing. Marginal ridges are the raised borders located on the occlusal surfaces of posterior teeth, where the two adjoining surfaces (mesial and distal) meet. They play a crucial role in occlusal stability and provide resistance to lateral forces during mastication, which helps in effectively breaking down food. Their anatomical design ensures that the forces generated during chewing are distributed evenly across the tooth structure.

Although defining occlusal surfaces and enhancing aesthetics are important functions in dental anatomy, these aspects are secondary to the primary role of marginal ridges in chewing support. Protecting the dental pulp, while vital for overall tooth health, is more related to the tooth's structure and the surrounding tissues rather than the specific function of marginal ridges.