primary cement

pri·mar·y ce·ment

cementum that has no cementocytes; may cover the entire root of the tooth but often is missing on the apical third of the root.

pri·mar·y ce·ment

(prīmar-ē sĕ-ment) Cementum that has no cementocytes; may cover entire tooth root but is often missing on apical third of the root.