What is the definition of the clinical root?

The clinical root of a tooth refers specifically to the portion of the root that becomes visible or is exposed due to gingival recession. This phenomenon occurs when the gum tissue surrounding the teeth wears away or pulls back, exposing more of the tooth root than is normally visible when the gums are healthy. Understanding this concept is crucial in dentistry, especially when assessing periodontal health, as the visibility of the root surface can have implications for treatment planning and patient care.

In contrast, the other definitions provided do not accurately describe the clinical root. For example, the portion of the root covered with enamel is not applicable since enamel primarily covers the crown of the tooth, not the root. Similarly, the entire root covered in cementum does not provide a clear distinction regarding visibility in the oral cavity. The part of the tooth exposed to the oral cavity generally refers to the crown, rather than to any clinical aspect of the root itself. Thus, the correct focus on the clinical root emphasizes its visibility due to gingival recession.