What are the v-shaped spaces between the proximal surfaces of two adjoining teeth called?

The v-shaped spaces between the proximal surfaces of two adjoining teeth are called embrasures. Embrasures play a crucial role in dental anatomy as they allow food to escape during chewing, which helps to keep the area clean and reduce the risk of decay.

Embrasures can typically be found at the gingival margin and are important for maintaining the health of the periodontal tissues by facilitating the natural flow of food and reducing the possibility of plaque accumulation. Understanding the structure and function of embrasures is essential for dental assistants, as it helps in planning proper oral hygiene practices and educating patients about the importance of interproximal cleaning.

To further clarify, the other terms do not accurately describe this specific anatomical feature. Fissures refer to small grooves or crevices on the surface of teeth, which can be prone to caries. Cavities are areas of decay in the tooth structure, while interdental spaces refer more generally to the spaces between teeth that may not have the v-shape characteristic of embrasures. This distinction helps solidify the understanding of dental morphology and hygiene.