Periodontum Flashcards
Periodontal tissues of the tooth consist of
- Cementum
- Periodontal ligament connect tooth to BAP
- Bony alveolar processes
- Gingiva facing tooth
Tissues form ________ that binds teeth to bony sockets.
Gomphosis
Unique fibrous joint from ectomesenchyme of dental sac/follicle
The periodontium is a type of ______.
Fibrous joint
Why is the periodontal pocket important?
Gateway for biofilm bacteria to enter root system
Periodontal Pocket Severity
1-2 mm : GOOD
Inflammation response will open pocket further.
What is cementum made of?
Similar to bone
Primary and Secondary Cementum
ORGANIC material: 23%
Hydroxyapatite: 65%
Water: 12%
What is in the ___% organic material in cementum?
23%
Collagen 1,3,12(PDL), little of 6,5,14
Proteins:
Bone Sialoprotein
Osteopontin
Osteocalcin
Osteonectin
Dentin Matrix Protein 1
Dentin Sialoprotein
BOOODDS
Cementum is thicker ________. It is an intermediate between _______.
Apically
Dentin and bone tissue
Cementum is vascular. True or false?
FALSE
Vascular
What does the cementum cover?
Root of teeth
It is formed in two stages what are they?
The first stage is pre-functional or primary where the Dentin is covered. This occurs during root formation.
The second stage is functional or secondary, where it is formed when teeth are erupted and in occlusion.
What are the 3 function of cementum?
- Cover root dentin (and tubules)
- Site of attachment for periodontal fibers (teeth to bone)
- Compensate for changes in surrounding bone.
Primary cementum is acellular/cellular. It has __________ and covers________.
acellular
one or more layers covers entire root surface
Secondary cementum is acellular/cellular. It is involved with __________ and covers _________.
cellular
tooth movement, repair, readjustment to changes in bone
covers apical third of root and interradicular surfaces
Fibrillar cementum
Abundance Collagen I
Afibrillar cementum
without well defined Collagen Type 1
Extrinsic fiber cementum
Extrinsic collagen fibers from periodontal ligament
Intrinsic Fiber Cementum
Intrinsic collagen fibers made by cementoblasts
What does Cementum look and feel like?
Pale yellow, darker than enamel
Grainy compared with harder, smooth enamel
Primary cementum has _______ at the surface.
Junction with dentin is called _______.
Collagen fibers ___________ to _______ junction.
cementoblasts
Tomes Granular Layer
Perpendicular to cementodentine
What is another name for extrinsic fibers and what collagen is it made of?
Sharpey’s Fibers
Collagen Type I