PDl Cells

Question 1

Osteoblast ( site- shape-function- origin)

Answer 1

Shape: mononucleated, cuboidal,
*Function: responsible for

1) Matrix formation (protein synthesis)

2) Mineralization (alkaline phosphatase E) Origin

Origin:Osteogenic or (Osteoprogenitor)

*Site: covers the periodontal surface of alveolar bone

Question 2

Fibroblast(ratio- shape- cytoplasm- junction- actin network -site, processes - function- types of fibers)

Answer 2

• Ratio: 65% of total cell population.

Shape: large stellate shaped cells
cytoplasm: extensive ,containing protein synthesis organelles
jonction: (gap junction).
► have a prominent actin network change in shape and migration

→site: They are aligned parallel to fiber bundles .
processes :wrap around the fiber bundles
Function :dual function synthesizing and degrading & turnover of collagen in the ligament (produces collagen, reticulin and oxytalan fibers)

Question 3

Renewal capability is an important characteristic of PDL .(true or false).

Answer 3

True

Question 4

Fibroblasts are morphological heterogeneous with change appearance depend in their location and activity? True or false.

Answer 4

True