Flashcards in Exam 1 Study Guide Deck (60):
Tissues of the periodontium include
4.) Alveolar Bone.
the functional system of tissues that surrounds the teeth and attaches them to the bone
Provides a tissue seal around the cervical portion of the teeth and holds tissue against tooth
Gingiva is comprised of
A thin outer layer of epithelium and an underlying core of connective tissue
A type of Periodontal disease characterized by changes in color, contour and consistency of the gingival tissue.
Clinical picture of gingivitis
Red (Erythematous), swollen with bleeding likely.
PDL and Alveolar bone are still intact. Supragingival fibers are destroyed.
Gingivits is observed clinically from
Tissue damage is irreversible in
Tissue damage is reversible in
A bacterial infection that is confined to the gingiva
A bacterial infection that includes all parts of the periodontium
A bacterial infection of the periodontium. ((Can include all parts of just the gingiva))
-- Not to be confused with periodontitis
2 types of periodontal disease
A gel-like substance containing interwoven protein fibers that surrounds most cells.
--Is mesh like.
5 Functions of the PDL
Tissue that has plentiful cells that are connected to one another by desmosomes
The Junctional Epithelium
Supportive Function of PDL
Provides cushion for Occlusal Forces and attaches tooth to the socket
Sensory Function of PDL
transmits tactile pressure and pain sensations
Nutritive Function of PDL
Has blood vessels that provide nutrients to cementum and bone
Formative Function of PDL
Has cementoblasts producing Cementum throughout life of tooth
Resorptive Function of PDL
has osteoclasts that can resorb bone and cementum
Without the PDL the tooth
would fall out of the socket and be lost
Cementum can be damaged by
Another name for the tooth socket
Alveolar Bone Proper
Sharpey Fibers are
the ends of PDL fibers that are embedded in the cementum and alveolar bone
The nerve supply to the periodontium comes from
Trigeminal Nerve (CNV)
Microscopically, a healthy periodontium will have whattype of appearance?
Connects 2 cells together
Connects a cell to the basil lamina
Fibers that circle the tooth in a ringlike matter are?
How are sharpeys fibers embedded into the tissue
As Cementum forms it hardens around one end of the sharpey fibers and As alveolar bone forms it surrounds on the opposite side.
A tissue that has no blood vessels or nerves and does not regenerate once it is destroyed
Development of a disease
The most common type of bone loss is
The extracellular Matrix helps
hold cells together and provides a framework so that cells can migrate and interact with one another
Horizontal bone loss
Results in fairly even, overall reduction in the height of the bone
Verticle bone loss
Results in an uneven reduction in bone height, more rapid progression of bone loss next to the root surface
*Leaves a trenchlike area of missing bone alongside the root
Vertical bone loss results in
Gingival pockets involving no destruction of the PDL fibers or alveolar bone
the destruction of the fibers and alveolar bone that support the teeth
An area of tissue destruction (can involve 1 or all surfaces of the tooth)
Active disease site
disease site that shows continued apical migration of the Junctional Epithelium over time.
-EX: A pocket read 5MM 3 months ago but today it read 6MM
Inactive disease site
stable disease site that attachment level of junctional epithelium remains the same over a period of time
Formerly known as early onset periodontitis
3 types of Periodontitis
Agressive, Chronic and less common types.
most lymph of the periodontium drains t?
the head and neck
Lymphnodes of the head and neck include
Submental nodes, Submandibular nodes, Deep cervical nodes and Jugulodigastric nodes.
Makes up outer surface of the body and lines cavities of body.
*Characterized by plentiful cells and sparse Extrcellular matrix
Fills spaces between tissues and organs .
*Characterized by Few cells and abundance of Extracellular Matrix
How thick is the Junctional epithelium
15-30 Cells thick and Coronal Zone
4-5 Cells thick at the Apical zone
Junctional epithelium forms
the base of the sulcus and joins the gingiva to the tooth surface.
A localized collection of pus within the tissues of the periodontium
Clinical signs of periodontal abscess
Circumscribed, localized swelling. Possible increase in tooth mobility. Fistula possible.
*tooth usually has vital pulp*
Periodontitis associated with endodontic Lesions
A tooth that has an abscess that is causing death to the tissues around the tooth (the periodontium)
Spongy, lattice like bone filler between the cortical bone and the alveolar bone proper
what is the function of cancellous bone
Oriented around the tooth to form support for the alveolar bone proper.
hard, outer layer of bone on the F and L surfaces of the jaw.
cellular structures that mechanically attach cell to cell or cell to basil lamina