Cementum

Question 1

Intermediate cementum is located between what..

Answer 1

Dentin’ granular layer of Tomes

Secondary layer cementum formed by cementoblasts

Question 2

Is Intermediate cememtum more or less mineralized than true cementum

Answer 2

MORE – it is similar to enamel and is non-cellular.

Question 3

What type of cementum seals dentinal tubules?

Answer 3

Intermediate dentin

Question 4

Intrinsic and extrinsic collagen fibers in true cementum come from where…

Answer 4

Intrinsic = cementoblasts
Extrinsic = from PDL fibroblasts == sharpey fibers!!!

Question 5

Is cementum vascular and neural?

Answer 5

NO - avascular and aneural!

Question 6

Is cementum softer or harder than dentin

Answer 6

Softer!

Question 7

Percent mineral by volume of cementum and percent organic (collagen)?

Answer 7

Mineral = 50%
Organic = 33%

Question 8

Glycosaminoglycans (organic matrix of cementum

Answer 8

Chondroitin sulfate
Dermatan sulfate
Hyaluronan

Question 9

What happens with aging to cementum?

Answer 9

Surface is irregular
Resorption occurs
Reversal lines are created

Question 10

Cementicles are composed of what…

Answer 10

Nidus of epithelial cells – with calcium phosphate and collagen.
Organic > inorganic

Question 11

Reversal lines are what…

Answer 11

The point where resorption stops and deposition begins!