Gingiva - Post review
specialized extracellular matrix
Because of the unique components of the internal basal lamina what is it considered
No
Does lining OM function in mastication?
Outer surface Sulcular/crevicular epithelium Junctional epithelium
How can gingiva be firther broken down?
Papillae, some with taste buds
How is specialized OM organized?
Minimal
How much gingival crevicular fluid is present in healthy conditions?
Endotoxins Trypsin-like enzymes Acid phosphatase Alkaline phosphatase Prostaglandin-like products
What are the bacterial components that make up GCF?
Interleukins (IL-1a+b) TNF-a Lactic acid Hydroxyproline Cytotoxic substances Antibacterial factors
What are the biomarkers that make up GCF?
Corneum Granulosum Spinosum Basale
What are the layers of (para) keratinized epithelium?
acid phosphatase alkaline phosphatase Cathepsin G, B, + D Collagenase Elastase Beta-glucironidase Gelatinase
What are the proteolytic + hydrolytic enzymes that make up GCF?
Alveogingival fibers
What binds the ginigva to the tooth and bone extending from the alveolar crest into the ginigva?
Dentogingival fibers
What binds to the gingiva to the tooth and bone extending from cementum into the gingivae?
FIbroblasts Undifferentiated MSC Mast cells Macrophages
What cells are in the gingiva CT?
smooth, intact no rete pegs
What does the inner sulcular epithelium look like in a healthy state?
Dense CT that does not contain large vessels
What does the lamina propria consist of?
crest of the gingiva, free gingiva and the attached gingiva
What does the outer epithelium cover?
Collagen fibers
What firmly attaches the attached gingiva to the bone?
Attached gingiva
What in the maxilla blends with palatal mucosa?
Papillary layer
What is blue?
Sulcular epthelium
What is blue?
Sulcus
What is blue?
Epithelium
What is green?
gingiva PDL cementum alveolar bone
What is included in the periodontium?
Rete pegs
What is pink?
Reticular layer
What is purple?
Junctional epithelium
What is red?
Lamina propria
What is red?
Gingival crevicular fluid
What is secreted through the outer sulcular epithelium?
a sign of health, but an absence of it is not always sign of disease
What is stippling considered?
Salivary glands
What is teal?
The portion of the gingiva that is firm, dense, stippled and tightly bound to the underlying periosteum, tooth, and bone
What is the attached gingiva?
Para-keratinized
What is the epithelium type in outer/oral gingival epithelium?
Related to permeability of CT
What is the flow of crevicular fluid based on?
Protect underlying structures while allowing some interaction w/ environment
What is the function of the epithelium
Protective
What is the function of the oral epithelium?
shallow fissure between the marginal gingiva and the enamel or cementum
What is the gingival sulcus?
true basement membrane components: Collagen IV + VII Laminin 1
What is the internal basal lamina lacking in?
Papillary layer + reticular layer
What is the lamina propria made of?
Submucosa
What is yellow?
stratified squamous, non-keratinized
What kind of epithelial cells make up lining OM?
Stratified squamous, keratinized
What kind of epithelial cells make up masticatory OM?
stratified squamous, non-keratinized
What kind of epithelial cells make up specialized OM?
Outer surface: Ortho keratinized epithelium Sulcular/crevicular epithelium: non-keratinized epithelium Junctional epithelium: non-keratinized
What kind of epithelium in gingiva areas: Outer surface Sulcular/crevicular epithelium Junctional epithelium
Inorganic ions Organic ions Proteolytic + hydrolytic enzymes Bacterial product Bio markers
What makes up gingival crevicular fluid?
Papillary + reticular CT layers
What makes up the dermis/lamina propria?
Cornified cells
What offers resistance to attrition in masticatory OM?
Rete pegs
What projects into the CT of the oral epithelium?
- lips - cheeks - floor of mouth - soft palate - ventral tongue
What structures of the OM are lining?
Gingiva + hard palate
What structures of the OM are masticatory?
Dorsum of tongue
What structures of the OM are specialized?
from base of mandible in lower jaw and the anterior nasal spine in maxilla
Where does the MGJ maintain a constant distance?
CT of inner sulcular epithelium into the sulcus from capillaries
Where does the gingival crevicular fluid flow from?
outer epithelium into the gingival sulcus
Where does the inner sulcular epithelium extend from?
At the MGJ
Where is the ginigva distinguished from the oral mucosa?
height of the gingiva extending to the junctional epithelium
Where is the sulcular epithelium found?
Interdental papilla
green?
interaction between ICAM-1 and LFA-1
how do neutrophils and lymphocytes penetrate into the junctional epithelium
coral pink, pink or pale pink but clinically the color can vary depending on melanin
how is the gingiva described in terms of physical characteristics
1mm wide (freakin yuge)
how wide is the marginal gingiva
frenum
orange?
col
pink?
Gingival groove
purple?
Attached gingiva
red?
Alveolar mucosa
teal?
MGJ
the attached gingiva is the portion that extends coronally from the ______
Laminin 5 and collagen type VIII
what are some of the components of the internal basal lamina
-cleansing sulcus -improving epithelial cell adherence to tooth surface -possessing antimicrobial and immune properties
what are the functions of gingival fluid
attached gingiva free gingiva/marginal gingiva papillary gingiva
what are the three subtypes of the gingiva
hemidesmosomes
what attaches the junctional epithelium to the tooth surface
ICAM-1
what does junctional epithelium express constitutively express
fibers from the connective tissue
what enhances the attachment of the junctional epithelium to the root surface
Increase in height
what happens to the height of the epithelial ridges with age
same as structures of typical basement membrane - lamina densa - lamina lucida
what is characteristic of the external basal lamina
firm, dense, stippled and tightly bound to underlying periosteum tooth and bone
what is the attached ginigva
dentogingival unit
what is the attachment of the free marginal gingival functional unit called
the depth past the gingival margin to which a periodontal probe will penetrate when introduced with light pressure
what is the clinical gingival sulcus?
Lamina propria
what is the connective tissue beneath the gingiva
keratinized and stippled
what is the epithelium of the attached gingiva
thin non-keratinized/para-keratinized
what is the epithelium of the inner sulcular epithelium
part of the gingiva that surrounds the tooth and is not directly attached to the tooth surface
what is the free gingiva
protection of the attachment of the tooth to the surrounding tissues
what is the function of the junctional epithelium
limit between the movable and immovable mucosa during the passive motion of the lip or cheek
what is the functional definition of the MGJ
valley like depression of the interdental gingiva that connects facial and lingual papillae and conforms to the shape of the interproximal contact area
what is the gingival col/col
shallow fissure between marginal gingiva and enamel or cementum
what is the gingival crevice
portion of the gingiva that overlies the junctional epithelium
what is the gingival cuff
most coronal portion of the gingiva
what is the marginal gingiva
area of union of the gingiva and alveolar mucosa
what is the mucogingival junction (MGJ)
attached gingiva and outer surface of free gingiva
what is the oral or outer epithelium
flush the tooth of pathogens and toxic metabolites from periodontium ; cushion tooth against foreign insult
what is the purpose of GCF?
1-9 mm
what is the width range of the attached gingiva
stratified squamous epithelium, non-keratinized
what kind epithelium does the junctional epithelium have
junctional epithelium
what separates the periodontal ligament from the oral environment?
Free/marginal gingiva
yellow?
CT of collagen fibers
60% of the lamina propria is made of
Permeable
Is the sulcular epithelium permeable or impermeable?
Gingiva
________ is the fibrous investing tissue covered by keratinized epithelium that immediately surrounds the tooth and is contiguous with its PDL and with the mucosal tissues of the mouth
Gingiva
____________ is that part of oral mucosa that covers the alveolar processes of the jaws and surrounds the necks of the teeth
Muco gingival junction
blue?
No remains stationary and constant
does the MGJ change over life
No
does the attached gingiva have a submucous layer
No
does the internal basal lamina have a true basement membrane
