Finals - PDL

Cell-rich, fiber-rich, non-calcified, dense/fibrous connective tissue structure that joins the cementum to the alveolar bone

Match Column B to Column A

CELLS OF PERIODONTAL LIGAMENT

Fibroblasts • ​ (a)  

Cementoprogenitor/Osteoprogenitor • ​ (b)  

Epithelial cells • ​ (c)  

Undifferentiated cells [Progenitor cells] • ​ (d)  

Macrophages • ​ Leukocytes • ​ (e)  

• Principal cells of PDL
• Cementoblast, Cementoclast, Osteoblast, Osteoclast
• Remnants of hertwig's epithelial root sheath, can
• Source of new cells for PDL
• Defense cells, Lymphocytes and Plasma cells

Match Column B to Column A

Resorptive Cells

Osteoblast- ​ (a)  

Fibroblast- ​ (b)  

Cementoblast-​ (c)  

Cementoclast- ​ (d)  

Osteoclast - ​ (e)  

• formation of new bone; found on the surface of bo
• destruction of collagen and protein synthesis
• Principal cells; mononuclear or multinuclear cells
• Mononuclear cells
• preformative cell of bone; Bone resorption

Progenitor cells - ​ (a)  

Connective tissue cell

Mast cell- ​ (b)  

Macrophage/ histocyte-​ (c)  

• Undifferentiated mesenchymal cells
• round oval cells with numerous cytoplasmic granule
• scavenger cells, ingesting and digesting dead cell

Types of Dentoalveolar Group

Alveolar Crest Group - ​ (a)  

Horizontal Fiber Group -​ (b)  

Apical Fiber Group - ​ (c)  

Interradicular Fiber Group - ​ (d)  

Oblique Fiber Group -​ (e)  

• anchor the tooth to alveolus and oppose lateral st
• resist displacement on lateral fibers
• prevent vestibulo-oral tipping
• resist tipping and torque (rotation)
• sustain occlusal stress, suspend and anchor tooth

Immature Elastin Fibers

Oxytalan Fibers -​ (a)  

Eluanin Fibers - ​ (b)  

Elastic Fibers -​ (c)  

Reticular Fibers -​ (d)  

• bundles of microfibrils, Acid Resistant
• Another form of elastic tissue, embedded within a
• confided to the walls of the blood vessels
• aid in the support of blood and lymphatic vessels

Vascular supply of the Periodontal ligament:

The periodontal ligament is located at the ____, A Narrow gap between cementum and bone

Space found between each group of fibers • Contains blood vessels, lymphatics and interstitial tissue

The normal width ranges of the Periodontal space is

• 0.10 - 0.38 mm.

• 0.11 - 0.38 mm.

• 0.10 - 0.35 mm.

• 0.11 - 0.40