Dentin and Pulp Study Guide | Structure, Formation & Function | Oral Histology Exam Prep
Peritubular dentin Dentin surrounding dentinal tubules; highly mineralized.
Intertubular dentin Dentin located between dentinal tubules; makes up most of dentin.
Mantle dentin First dentin formed during tooth development.
Collagen fiber orientation in mantle dentin Perpendicular to the DEJ.
Mineralization of mantle dentin More highly mineralized than circumpulpal dentin.
Circumpulpal dentin Dentin that forms after mantle dentin and makes up most of the tooth.
Collagen fiber orientation in circumpulpal dentin Parallel to the DEJ.
Primary dentin Dentin formed before closure of the apical foramen.
Tubules in primary dentin Regular and uniform.
Secondary dentin Dentin formed after closure of the apical foramen and throughout life.
Characteristics of secondary dentin Forms slowly, is less mineralized, and reduces pulp chamber size.
Tertiary dentin Dentin formed rapidly in response to injury.
Other names for tertiary dentin Reparative dentin or reactive dentin.
Causes of tertiary dentin Caries, cavity preparation, attrition, or gingival recession.
Tubules in tertiary dentin Irregularly arranged.
Sclerotic dentin A type of tertiary dentin formed during aging or chronic injury.
Peritubular dentin Dentin surrounding dentinal tubules; highly mineralized.
Intertubular dentin Dentin located between dentinal tubules; makes up most of dentin.
Mantle dentin First dentin formed during tooth development.
Collagen fiber orientation in mantle dentin Perpendicular to the DEJ.
Mineralization of mantle dentin More highly mineralized than circumpulpal dentin.
Circumpulpal dentin Dentin that forms after mantle dentin and makes up most of the tooth.
Collagen fiber orientation in circumpulpal dentin Parallel to the DEJ.
Primary dentin Dentin formed before closure of the apical foramen.
Tubules in primary dentin Regular and uniform.
Secondary dentin Dentin formed after closure of the apical foramen and throughout life.
Characteristics of secondary dentin Forms slowly, is less mineralized, and reduces pulp chamber size.
Tertiary dentin Dentin formed rapidly in response to injury.
Other names for tertiary dentin Reparative dentin or reactive dentin.
Causes of tertiary dentin Caries, cavity preparation, attrition, or gingival recession.
Tubules in tertiary dentin Irregularly arranged.
Sclerotic dentin A type of tertiary dentin formed during aging or chronic injury.
