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PDL Blood & Nerve supply

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by

Enas Abd el latif

on 14 March 2014

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Transcript of PDL Blood & Nerve supply

Contents :
Blood supply,Lymphatics & Nerve supply of the PDL
The PDL is highly vasularized
High turn over rate.
The blood vessels & nerves occupy areas called "Interstitial areas"
Blood supply
Arterial supply
Posterior teeth > Anterior teeth
Mandibular teeth > Maxillary teeth
Pattern of distribution
Nerve Supply
Axially directed vessels that drain into a network of large diameter venules in the apical portion of the ligament.
Venous drainage
There are four types of nerve endings in the PDL :
Free nerve endings
Ruffini's ending
Coiled Ending
Encapsulated spindle-type ending
Types of neural
terminations
Shape :
Tree-like configuration
site:
Along the length of the root
Function:
pain & mechanoreceptors

Free nerve endings
1-Blood supply
arterial supply
venous drainage
2-Lymphatics
3-Nerve Supply
3 sources
branches from apical vessels
branches from intra-alveolar vessels "Perforating arteries "
Branches from gingival vessels
The main blood supply to the PDL is through the sup. & inf. alveolar arteries
They penetrate the bone & enter the PDL space "Perforating arteries"
clinical importance
In Healing of extraction wounds ,new tissue & clotting factors invade from the perforations .

Lymphatics
They tend to follow the venous drainage They flow from the ligament toward the alveolar bone
Rufffin's corpuscles
Shape:
Dendritic
Site:
Around the root Apex
Function:
Mechanoreceptors


Encapsulated spindle-like
Shape:
spindle-like + capsule.
Site:
Root apex
Function:
Mechanoreceptors

Coiled ending
Shape
:Coiled form.
Site:
mid-region of the PDL
Function:
not determined yet
Full transcript