Which statement describes a physical function of the periodontal ligament?

• A. Transmission of occlusal forces to the bone
• B. Secretion of saliva products
• C. Mineral storage within cementum
• D. Growth of the tooth germ

Answer: (A)

The periodontal ligament’s main physical function is transmitting occlusal forces from the tooth to the surrounding alveolar bone. Its fibrous connection, with Sharpey's fibers anchoring cementum to bone, allows chewing loads to be distributed and damped rather than concentrated at one point. This mechanical linkage enables controlled tooth movement and helps stimulate bone remodeling to maintain tooth stability under functional forces. Other statements describe functions not provided by the PDL—secretion of saliva comes from salivary glands, mineral storage occurs in cementum or bone, and growth of the tooth germ happens during development.