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

• What cells are responsible for producing cementum?
• How does cementum contribute to dental health?
• What is one major difference between enamel and cementum regarding their ability to repair?

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.