Cementum
Official clinical terminology, patient guidance, and dental treatment insights from BB Dental Care.
Official Clinical Definition
Hard connective tissue covering the outer surface of a tooth root.
Understanding Cementum in Dental Practice
In clinical dentistry, precise terminology is vital for accurate diagnostic charting, patient education, and customized treatment planning. Whether evaluating pulpal vitality, bone architecture, or restorative materials, our Burbank dental team uses ADA-standardized protocols to ensure long-term oral health.
If your dentist has diagnosed or discussed Cementum during your visit, reviewing the common clinical questions below will help clarify what this condition or procedure involves, how it impacts your oral wellbeing, and what modern treatment options exist.
Frequently Asked Questions About Cementum
Common questions patients ask about cementum in relation to oral health, symptoms, and modern dentistry.
What is cementum and what does it do?
Cementum is a specialized, calcified connective tissue that covers the outer surface of a tooth's anatomical root. Its primary function is to anchor the principal collagen fibers of the periodontal ligament (PDL) to the tooth root, securing the tooth firmly within the surrounding alveolar jawbone.
How does cementum differ from tooth enamel?
Unlike enamel, which is 96% mineralized and completely non-living, cementum is softer (about 45–50% hydroxyapatite) and covers only the root surface beneath the gumline. Enamel cannot regenerate once formed, whereas cellular cementum continues to deposit in thin layers throughout life at the root apex to compensate for tooth wear and occlusal eruption.
What happens when cementum is exposed to the oral cavity?
Gum recession from aggressive brushing or periodontal disease exposes cementum to the oral environment. Because cementum is thin and softer than enamel, it quickly wears away, exposing porous dentin underneath. This often leads to sharp root sensitivity to hot, cold, or sweet foods and increases susceptibility to root caries (cavities).
How do dentists treat damaged or exposed cementum?
Dentists manage exposed root surfaces with desensitizing varnishes, gentle bonding with composite resin, and periodontal soft-tissue grafting to recover the exposed root. In periodontal therapy, careful root planing smooths diseased cementum containing bacterial endotoxins to promote gum reattachment.