What tissue covers the full root of a tooth?

Cementum is the correct tissue that covers the full root of a tooth. It is a specialized calcified substance that forms the outer layer of the tooth root, playing a crucial role in anchoring the tooth to the periodontal ligament and surrounding alveolar bone. Cementum helps provide stability and support, ensuring the integrity of the tooth structure within the jaw.

In contrast, dentin is the main body material of the tooth beneath the enamel and cementum, but it does not cover the root; it forms the bulk of the tooth and provides strength. Enamel is the hard outer layer that covers the crown of the tooth but does not extend to the root. Pulp is the innermost part of the tooth that contains nerves and blood vessels but is not a covering tissue. Understanding these distinct functions of each tissue is essential in dental anatomy, as it highlights the specific role of cementum in maintaining tooth stability.