Dental Admissions Test (DAT) Practice Test

The function of the periodontal ligament is to hold the tooth in the socket, providing the essential connective structure between the tooth and the alveolar bone. This ligament is made up of specialized connective tissue fibers that anchor the tooth securely, allowing for slight movement during activities such as chewing, which helps to absorb forces and maintain stability.

Additionally, the periodontal ligament contains various cells that can sense pressure and pain, contributing to the overall health of the tooth and surrounding structures. This allows for a functional balance between the tooth and the jawbone, which is crucial for maintaining oral health and functionality throughout a person's life.

The other choices do not accurately reflect the primary role of the periodontal ligament: it does not serve to protect tooth enamel, assist in tooth growth, or form the tooth root; those functions pertain to other structures in the oral cavity.