Histology of gingiva revision notes quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the appearance of healthy gingiva described in the content?

Flat and pale

Stippled and knife-edge (correct)

Rough and puffy

Smooth and shiny

Which cellular layer of the oral epithelium is cube-shaped?

Granular cell

Prickle cell

Keratinized cell

Basal cell (correct)

What function do retepegs serve in the gingival epithelium?

Providing strength and support (correct)

Regulating inflammation

Protection from pathogens

Facilitating fluid absorption

What type of epithelium is found on the surface facing the tooth in the gingiva?

Stratified squamous-non-keratinized Signup and view all the answers

Which characteristic does the keratinized layer of gingival epithelium exhibit?

Resistance to mechanical stress Signup and view all the answers

How is gingival crevicular fluid described in terms of its interaction with the epithelium?

Semi-permeable and flowing Signup and view all the answers

Which cell type in the gingival epithelium is characterized by a flattened shape with extensive keratin?

Keratinized cell Signup and view all the answers

What type of epithelial layer is noted as lacking rete pegs?

Sulkular epithelium Signup and view all the answers

Which description best defines the keratinization process in gingival epithelium?

Provides mechanical protection Signup and view all the answers

What is the significance of the mucogingival junction mentioned in the content?

It serves as the transition between different types of gingival epithelium. Signup and view all the answers

Which structure in gingival connective tissue is responsible for its attachment to alveolar bone?

Lamina propria Signup and view all the answers

What role do supragingival fibers play in gingival anatomy?

Keep gingiva upright Signup and view all the answers

Which type of fiber links teeth together in a mesiodistal direction along the whole dental arch?

Intergingival fibers Signup and view all the answers

What effect does inflammation have on the density of supragingival fibers?

Causes a decrease in density Signup and view all the answers

Which fibers run from the alveolar crest to the gingival connective tissue?

Alveologingival fibers Signup and view all the answers

Which type of fiber encircles several teeth linking them together?

Intercircular fibers Signup and view all the answers

What type of fibers run horizontally from the cementum to the cementoenamel junction (CEJ)?

Transgingival fibers Signup and view all the answers

What is one function of the dense network in the gingival connective tissue?

Provide solidity Signup and view all the answers

What type of fibers connect the periosteum to the gingival connective tissue?

Periosteogingival fibers Signup and view all the answers

Which fibers connect the cementum of one tooth to another over crestal bone?

Transeptal fibers Signup and view all the answers

What type of cells primarily compose the junctional epithelium?

Spine-shaped cells Signup and view all the answers

What structures join the epithelial cells to the basal lamina within the junctional epithelium?

Hemidesmosomes Signup and view all the answers

What is the primary function of the junctional epithelium?

Anchor gingiva to teeth Signup and view all the answers

How thick is the junctional epithelium coronally?

15-30 cells thick Signup and view all the answers

Which of the following is a characteristic of the internal basal lamina?

Thin extracellular matrix Signup and view all the answers

What type of epithelial tissue primarily comprises the junctional epithelium?

Stratified squamous non-keratinized epithelium Signup and view all the answers

Which component is involved in the host response within the junctional epithelium?

White blood cells Signup and view all the answers

Which layer of the junctional epithelium is primarily concerned with attachment?

Basal cell layer Signup and view all the answers

What type of junctions do closely packed epithelial cells in the junctional epithelium primarily use?

Desmosomes Signup and view all the answers

Study Notes

Healthy Gingiva

Stippled appearance: The healthy gingiva has a distinctive surface texture that resembles an orange peel.
Knife-edge gingival margins: The margins of the healthy gingiva are sharp and well-defined, forming a distinct line with the tooth surface.

Oral Epithelium

Stratified squamous epithelium: This is the type of epithelium found in the oral cavity. It consists of multiple layers of cells.
Keratinized: The outer surface of the free and attached gingiva.
Extends: The oral epithelium spans from the crest of the gingival margin to the mucogingival junction.
Rete pegs: These interdigitations between the epithelium and the underlying connective tissue provide strength and support to the gingiva to withstand external forces.
Protection: Keratinization protects the gingiva from mechanical stress and trauma.
Layers of keratinized epithelium:
- Basal cell layer: Composed of cubical cells responsible for cell renewal.
- Prickle cell layer: Composed of spine-shaped cells.
- Granular cell layer: Flattened cells with increased keratin.
- Keratinized cell layer: Flattened, highly keratinized cells.

Sulcular Epithelium

Non-keratinized stratified squamous epithelium: This type of epithelium faces the tooth surface but is not in contact with the free margin.
Semi-permeable: Allows gingival crevicular fluid (GCF) to flow from the tissue into the sulcus.
No rete pegs or keratinized epithelium: This makes the sulcular epithelium more susceptible to bacteria.
Layers of sulcular epithelium:
- Basal cell layer: Cubical shaped.
- Prickle cell layer: Spine-shaped cells.
- Superficial cell layer: This forms the outer layer of the epithelium.

Junctional Epithelium

Non-keratinized stratified squamous epithelium: This epithelium tightly joins the gingiva to the tooth.
Thickness: It ranges from 15-30 cells thick coronally and 4-5 cells thick apically.
Epithelial cell attachment: Cells are closely packed and joined by desmosomes.
Hemidesmosomes: Join epithelial cells to the basal lamina.
Basal lamina: This thin extracellular matrix is essential for attachment to the tooth surface.
Functions:
- Attachment: Hemidesmosomes play a crucial role in attaching the gingiva to the tooth.
- Barrier: It forms a barrier against bacterial penetration.
- Host response: The junctional epithelium allows GCF to flow, carrying white blood cells and antibodies to defend against infection.

Gingival Connective Tissue

Lamina propria: Also known as the gingival connective tissue.
Location: Found both in the free and attached gingiva.
Function: Provides solidity to the gingiva through its dense network of fibers.
Attachment: Attaches the gingiva to the cementum of the root and alveolar bone.
Transportation: Facilitates the transport of water, nutrients, and other substances within the matrix.
Host response: Plays a role in the immune response.

Supragingival Fibers

Elastic and collagen fibers: Contribute to the structural integrity and biomechanics of the gingiva.
Upright position: These fibers help maintain the gingiva in its upright position.
Force resistance: They act as a brace to withstand various forces in different directions.
Inflammation: Inflammation can lead to a decrease in fiber density, compromising the structural integrity.

Supragingival Fiber Groups

Alveologingival fibers: Extend from the alveolar crest to the gingival connective tissue.
Circular fibers: Encircle the tooth coronally, above the crestal bone.
Dentogingival fibers: From the cementum, fan into the gingival connective tissue.
Periosteogingival fibers: Fan from the periosteum.
Intergingival fibers: Run mesiodistally along the dental arch, linking teeth together.
Intercircular fibers: Encircle several teeth, connecting them.
Interpapillary fibers: Located in the interdental papilla, connecting the oral and vestibular papilla.
Transgingival fibers: Extend from the cementum to the cementoenamel junction (CEJ) and run horizontally, connecting teeth together.
Transeptal fibers: Extend from the cementum of one tooth to another tooth over the crestal bone.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Histology of gingiva