Anatomy of the Periodontium Part I #1 Flashcards
What are the 3 kinds of gingiva?
- Free gingiva
- Attached Gingiva
- Interdental papilla
Where is the free gingival margin located?
1.5-2mm coronal to the CEJ
What is the Free gingiva made of?
Keratinized epithelium
______ is where the PDL attaches to cementum.
Sharpes fibers
_____ is where PDL attaches to alveolar bone proper (inner cortical plate) .
Bundle bone
_______ Determines the shape and form of the tooth.
Dental papilla
Dental papilla gives rise to ______ and _____.
Dentin and pulp
Dental follicle gives rise to ________.
Periodontium
_________ Condenses and forms dental papilla and follicle.
Ectomesenchyme
_______ Induce the differentiation of cells of follicle into cementoblasts.
Amelogenins
The PDL is formed by _________.
Fibroblasts (that are differentiated from dental follicle lateral to the cementum).
Osteoblasts differentiate from __________.
dental follicle ectomesenchymal cells
The Free gingival groove corresponds with the ______ and is found in ____% of adults.
CEJ
30-40% of adults
________ faces tooth surface without touching it.
Oral sulcar epithelium
_______ provides contact between tooth and gingiva.
Junctional Epithelium
________ is the source for sulcar epithelium.
Oral epithelium
What are the Macroscopic limits of the free gingiva?
From the Free gingival margin to Free gingival groove.
What are the Microscopic limits of the Free gingiva?
From the Free gingival margin to the JE
Where is the width of the attached gingiva greatest?
in the incisors
Where is the width of the attached gingiva narrowest?
in premolars
What happens to width of attached gingiva with age?
it ( the width) increases with age
What does the shape of the interdental papilla depend on?
- the contact of the adjacent teeth
- with of proximal tooth surfaces
- Course of CEJ
What happens to interdental papilla if tooth is extracted?
It goes from being concave to convex, b/c it only exist because of presence of tooth.
T or F the interdental papilla can disappear and be recreated.
True
What are 4 layers of Oral epithelium?
- basal layer
- Prickle layer
- Granular layer
- Keratinized cell layer
As you go towards the basal layer of oral epithelium there are more ________.
Organelles
As you go towards the Keratinized layer of Oral epithelium, there are more _________.
Desmosomes
What are the 2 types of Oral epithelium?
- orthokerantinized = no nucleus
- parakeratinized = nuclear remnants
______ make up 90% of oral epithelium.
Keratinocytes
Where is the basement membrane found in oral epithelium?
Between basal layer and connective tissue.
What are the 2 layers of the basement membrane?
Lamina lucida = adjacent to basal cells
Lamina Densa = adjacent to connective tissue
What causes stippling?
Boundary between OE and Underlying CT.
- Epithelial rete pegs
- CT papillae
- Sign of health!
