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PDL Blood & Nerve supply
Transcript of PDL Blood & Nerve supply
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"
Posterior teeth > Anterior teeth
Mandibular teeth > Maxillary teeth
Pattern of distribution
Axially directed vessels that drain into a network of large diameter venules in the apical portion of the ligament.
There are four types of nerve endings in the PDL :
Free nerve endings
Encapsulated spindle-type ending
Types of neural
Along the length of the root
pain & mechanoreceptors
Free nerve endings
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"
In Healing of extraction wounds ,new tissue & clotting factors invade from the perforations .
They tend to follow the venous drainage They flow from the ligament toward the alveolar bone
Around the root Apex
spindle-like + capsule.
mid-region of the PDL
not determined yet