What is the primary function of cementum in the periodontium?

Cementum plays a crucial role in the periodontium by covering the root surface of teeth. This layer of calcified tissue is essential because it provides a medium for attachment of the periodontal ligaments, which anchor the tooth firmly within its socket. The presence of cementum helps in the stability of the tooth, contributing to overall dental health.

In addition to supporting the attachment of ligaments, cementum also has a role in the repair and regeneration process after tooth injuries or periodontal disease. Its ability to adapt and remodel makes it a vital component of the tooth's support system. Understanding the primary function of cementum is fundamental for grasping the overall structural integrity and function of the periodontium. Other options, such as supporting enamel, producing dental pulp, or forming the crown's hard surface, do not align with the specific purpose of cementum within the biological framework of the teeth and their supporting structures.