What is a key feature of gingival recession?

A key feature of gingival recession is indeed the loss of gum tissue. Gingival recession refers to the displacement of the gingival margin apically to the cemento-enamel junction, which exposes the root surface of the teeth. This condition occurs when the gum tissue that surrounds the teeth wears away or shrinks, leading to a direct loss of gum tissue.

This loss can be a result of various factors such as periodontal disease, aggressive tooth brushing techniques, or anatomical factors. The visibility of tooth roots is a hallmark of this condition, and it can lead to increased sensitivity, aesthetic concerns, and an elevated risk of root caries.

While other choices like the formation of periodontal pockets, bone loss, and increased attachment loss are associated with periodontal disease, they are not exclusive indicators of gingival recession itself. These elements may be present in more advanced stages of periodontal disease, but they do not define the primary characteristic of gingival recession, which is the direct loss of gum tissue.