Which surface of the tooth is closest to the lips?

The surface of the tooth that is closest to the lips is known as the labial surface. This term specifically refers to the area of the tooth facing the lips, differentiating it from other surfaces based on their orientation in the oral cavity. The labial surfaces are predominantly found on the anterior teeth, such as incisors and canines, where they play a significant role in aesthetics and facial dynamics.

Understanding the terminology in relation to tooth surfaces is crucial for dental professionals, as it aids in communication regarding dental exams, treatments, and patient education. The designation of labial versus other surfaces like palatal (which is the surface facing the palate of the mouth), lingual (the surface facing the tongue), and buccal (the surface facing the cheeks) is important in various dental contexts, including restorative procedures and orthodontics.