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Primary & Secondary Cementum
On this image identify dentin (A), Tomes' granular layer (B), primary cementum (D), and secondary cementum (C). Apical cementum (which is chiefly cellular or secondary) can be 5 times as thick as cervical cementum (which is usually acellular or primary only). In which direction is the crown of this tooth? (look at E to check your answer). Cementum increases in thickness with age, becoming about 3 times thicker in the interval between 11 and 76 years of age.
Legend
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A - dentin |
D - primary cementum |
