What is the definition of a sulcus in dental terminology?

In dental terminology, a sulcus refers specifically to the gap or space between the tooth and the surrounding gums. This area is critical in periodontal health, as it is where the gingival sulcus exists, allowing for the attachment of the gingiva to the tooth. A healthy sulcus depth is typically 1 to 3 millimeters. If the sulcus deepens, it may indicate periodontal disease, as the space can become filled with plaque and calculus, which can lead to inflammation and other oral health issues. Understanding the role of the sulcus is vital for dental professionals who assess periodontal health and provide appropriate care and treatment.