What is defined as the space between adjacent teeth at the cervical third of the crown, usually filled with papilla?

The correct choice is the embrasure, which refers to the space between adjacent teeth at the cervical third of the crown. This area is typically filled with the gingival papilla, which is the portion of gum tissue that occupies the space between teeth. Understanding the role of the embrasure is essential for dental professionals, as it relates to the health and aesthetics of the gingival tissues, as well as plaque accumulation in that area. Maintaining proper hygiene and dental care in the embrasure area can help prevent periodontal diseases and contribute to overall oral health.

The other terms provided have distinct meanings that are not synonymous with the defined space. Furcation refers to the area of a tooth where the roots diverge, often assessed when looking for periodontal health issues. The interdental space may refer to the general area between teeth but does not specifically describe the cervical third or the relationship to papilla. A periodontal pocket is a pathological deepening of the gingival sulcus due to periodontal disease, which is not related to the normal anatomical space defined by the embrasure. Understanding these distinctions is crucial for effective dental practice and patient education.