The Periodontium I Flashcards
The periodontium is composed of what 3 things?
- Alveolar Process
- Cementum
- PDL
How does Alveolar Process formed
intremembranous ossification
when does the alveolar process begin to form?
8 weeks in utero
what influences the alveolar process?
dental follicle
What type of bone is the Alveolar Bone Proper?
COMPACT bone
What type of bone is the supporting alveolar bone?
both compact and trabecular bone
3 components of the Alveolar bone Proper
- Cribriform plate
- lamina dura
- bundle bone
Inner Alveolar bone proper
is primarly woven bone
WHen is bone marrow yellow?
in aged people (red in young)
what is the interradicular septum?
bony setptum between roots of a single tooth
4 functions of the alveolar bone
- protection for a tooth
- attachment for PDL
- Support roots
- distribute loading of the tooth
How do the PDL’s start off?
unorganized and from fragments of HERS
WHen do PDL fibers change orentation?
When the tooth erupts
Which collagen is found in PDL?
1,3,12
What is the main elastic fiber of the PDL?
Oxytalan
How much water is in the PDL?
70%
which teeth have more penetrating arterioles?
posterior mandible
most nerve endings are found at the tooth apex which tooth is the exepction? and where is it?
Upper incisors, mainly the Coronal/labial portion of the PDL
what are the 4 types of nerve endings found in pdl?
free nerve ending
Ruffinis Corpuscle
Coiled
Spindle
What are the 5 types of PDL?
Alveolar Crest Horizontal Oblique Apical Interradicular (multiroot only)
Is the gingival ligament associated with the PDL?
no
What are the 5 groups of the Gingival ligaments?
Dentogingival Alveologingival Circular Dentoperiosteal Transseptal fibers
