Which surface of the tooth is the lingual surface?

The lingual surface of a tooth refers to the side that faces the tongue. This designation is important in dental anatomy as it helps in identifying the orientation of the teeth within the mouth. Understanding the term "lingual" is essential for dental professionals, as it allows them to communicate effectively regarding dental procedures, conditions, and treatment plans.

In this context, the surfaces of teeth are categorized based on their respective orientations: the buccal surface faces the cheeks, the lingual surface faces the tongue, the occlusal surface is the chewing surface, and the mesial (or proximal) surfaces are those that are closest to the midline of the dental arch. Thus, identifying the lingual surface correctly helps in various aspects of dental care, including hygiene practices and restorative work.