Which term refers to the tissue covering the necks of the teeth?

The term that refers to the tissue covering the necks of the teeth is gingiva. This specific oral tissue forms part of the periodontium, which supports the teeth and plays a crucial role in oral health. Gingiva acts as a protective barrier against bacteria and other potentially harmful substances, surrounding the teeth and forming a seal that is essential for maintaining the integrity of the underlying structures. Healthy gingiva is typically pink and firm, indicating good oral hygiene.

Other terms listed, while related to different anatomical or medical contexts, do not pertain to the tissue that covers the teeth. Granulocyte refers to a type of white blood cell involved in the immune response. Glabella is the smooth area between the eyebrows, and grattage is a term related to scraping or the act of scraping in a medical context, typically unrelated to dental anatomy. Therefore, the correct choice emphasizes the specific function and critical role of gingiva in dental health.