Anatomy of the Periodontium Flashcards by Jacob Amato

other names for the periodontium

Attachment apparatus

Supporting tissues of the tooth

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Parts of periodontium from inside to outside

Root Cementum
PDL
Alveolar Bone
Gingiva

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Alveolar Bone parts

Alveolar Bone Proper (bundle Bone)

Alveolar Process

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what makes up the Alveolar bone`

Inner Cortical Plate (near cementum)
Alveolar bone Proper
OUter coritcal plate (near gingiva

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Embryogensis of Tooth

-Ectomesenchyme condesnses around Dental Organ

Dental Papilla and dental follicle form

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what does the dental papilla give rise to

Dentin and pulp to determine the shape of the tooth

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what deos the dental follicle form

the periodontium

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what is the Gingiva

Part of the masticatory mucosa which covers the alveolar process and surrounds the cervical portion of the teeth

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PArts of the gingiva

Free Gingiva
Attached gingiva
Interdental papilla

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what are the two sides of the PDL

Bundle bone and Sharpy’s fibers

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where does all of the periodontium come from

Dental Folicle

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other names for Free GIngiva

Gingival sulcus
MArginal gingiva
Sulcus depth

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where does the Free gingiva exist

From the Free Gignival margin to the Free gingival groove

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what is the gingiva made from

Keratinized epithelium

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what is the coronal end of the gingiva

Free gingival margin

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location of the Free gingival margin

1.5-2mm coronal to CEJ

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what does the free gingival groove conect

The junction between free and attached gingiva

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what does the Free gingival groove relate to

CEJ

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how many people have free gingival grooves

30-40 percent of adults

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where does the oral epithlium of the gingva face

Faces the oral caivty

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where does the oral sulcular epithlium face

Tooth surface, without contacting it

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what does junctional epithlium do

Provides contact between gingiva and the tooth

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what does the probe depth represent in health

the free gingiva

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where is the junctional epithlium in an erupted tooth

at th CEJ or 1mm above it

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Characteristics of attached gingiva

Firm Coral pink Immobile

what happens to width of attached gingiva as you age

increases with age due to passive eruption

where is the attached gingiva the widdest and most narrow

widest in incisors and most narrow in the premolars | except mandibular lingual where it is narrowest in incisors and widest in molars

what is stippling

Small depressions on the attached gingiva

how many people have stipling

40%

is Stippling good

Yes, sign of health (goes away from inflammation)

what is the mucogingival junction

the junction betwwen the attached gingiva and alveolar mucosa

where is a mucogingival junction not found

Not in the Palate

what type of people tend to have free gingival grooves

Those that also have stippling

roll of the attached gingiva

Supports marginal gingiva Base for moveable elements (lips, cheek, tongue) Withstand Functional stress Barrier for passage of inglammation

how does the attached gingival withstand frictional and functional stresses

Thick CT layer | Firmly bound to periosteum and bone

does thickness of attached gingiva mayyer to healthy patients

what characteristics of gingiva matter for prevention of inflammation

Width | Thickness

what part of the mouth does not have a mucogingival junction

palate (no non-keratinized tissue, so no junction possible)

what is width of the gingiva

the height (apical to coronal)

what is the thickness of gingival

tooth to facial/lingual dimension

what does the shape of the interdental papilla depend on

The contact relationships between adjacent teeth With of approximal tooth surfaces Course of CEJ

what is the Col

Concavity seen in contact areas of premolar/molar region

what type of epithelium makes up the col

Non-keratinized epithelium( similar to junctional)

when does the papilla completely fill the space between teeth

when the distance from the contact point to the crest of the bone is less than 5 mm

problem with the dental papilla

greatest susesptibility to perio disease

what happens to the interdental papilla if there is space between the teeth

disappears

does the interdental papilla reappear once teeth come back into contact

Yes

size demensions for black triangles

- less then 5mm between bone crest and contact point: no black triangles - less than 6mm: 50% loose - less than 7mm: 75% loose papilla

if tooth is removed what happens to dental papilla

Does go away, but can come back if you fill space quickly

The base(bottom) of the gingival sulcus in a healthy mouth is positioned apical to the CEJ. When is this condition most likely to occur?

at ages 40-60 years old

what are the cells of the oral epithelium

KEratinized, stratified, squamous epithelium (keratinocytes)

layers of the oral epithelium

Basal layer (stratum basale or stratum germinativum) PRickle cell later (stratum spinosum) Granular cell layer (stratum granulosum) Keratinized cell layer (stratum corneum)

what types of cells make up the keratinized cell layer of the oral epithelium

Orthokeratinized (no nucleus) | Parakeratinized (nuclear remnanats)

what cells can devide in the oral epithelium

BAsal layer

what happens to cells as you move from the basal layer in oral epithelium

``` more desmosomes Less leaky more dense less active less organelles more keratin/tonofilaments ```

why does the oral epithlium want to be leaky

so nutrients and blood can get to the more superficial layers

what are the 2 types of cells of the oral epithlium

Keratinocytes | Clear cells

what are the clear cells of the oral epithlium

Melanocytes Langerhans cells Merkel's cells

Roll of lnagerhans cells

Defensive cells

Roll of Merkel's cells

Sensory

where is the basement membrane found

Present between basal layer of oral epithlium and CT

size of the basement membrane

1-2 micrometers wide

what is found in basements membrane

Rich in glycoproteins | Protein-polysacccharide complexes

roll of glycoproteins in basement membranes

Space maintainers | keeps tissues hydrated

layers of the basement membarnes

Lamina Lucida | Lamina Densa

what is the lamina lucida next to

Adjacent to basal cells

what is the lamina densa next to

Connective tissue

what attaches the lamina densa to connective tissue

anchoring fibers

what attaches the lamina lucida to the epithelium

Hemidesmosomes

what is a desmosomes

Pair of hemidesmosomes

what is the morphology between the Oral epithlium and connective tissues

Connective tissues projects into epithelium via Connective tissue Papillae

what are the projections of eptihlium to the connective tissue

Epithelial eidges or rete pegs

where are REte pegs not found

At Junctional epithlium sites

what causes Stippling

Rete pegs fusing

what biotype tends to have stippling

Thick biotype

Anatomy of the Periodontium Flashcards

(75 cards)