Cementum

Definition

Cementum is a specialized calcified substance covering the root of a tooth. It helps anchor the periodontal ligament fibers to the tooth, playing a critical role in maintaining dental stability.

5 Must Know Facts For Your Next Test

1. Cementum is produced by cementoblasts and mainly composed of hydroxyapatite (45-50%).
2. Unlike enamel, cementum can continue to form and repair itself throughout life.
3. Cementum's primary function is to provide attachment for the periodontal ligament fibers.
4. It plays a crucial role in protecting the root dentin from resorptive processes.
5. Pathogenic bacteria can cause inflammation leading to diseases such as periodontitis, which affects the cementum.

Review Questions

Related terms

Enamel: The hardest tissue in the human body that covers the crown of a tooth.

Periodontal Ligament:

A group of specialized connective tissue fibers that attach a tooth to the alveolar bone.

Dentin: The layer beneath enamel and cementum which forms the bulk of a tooth's structure.