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Questions and Answers
What is the primary function of gingival connective tissue?
What is the primary function of gingival connective tissue?
- Resistance to bacterial invasion
- Integration with alveolar bone
- Transportation of substances to connective tissue cells (correct)
- Regeneration of lost tooth structure
Which supragingival fibre links the cementum of one tooth to another over the crestal bone?
Which supragingival fibre links the cementum of one tooth to another over the crestal bone?
- Intergingival fibres
- Transeptal fibres (correct)
- Alveologingival fibres
- Transgingival fibres
In a healthy state, what is the approximate depth of the gingival sulcus?
In a healthy state, what is the approximate depth of the gingival sulcus?
- 5-6 mm
- 7-8 mm
- 1-2 mm
- 3-4 mm (correct)
What is the structure of the gingival sulcus primarily characterized by?
What is the structure of the gingival sulcus primarily characterized by?
Which of the following supragingival fibres encircles several teeth and provides linkage?
Which of the following supragingival fibres encircles several teeth and provides linkage?
What role does gingival connective tissue play in the immune response?
What role does gingival connective tissue play in the immune response?
Which type of supragingival fibre runs mesiodistally along the dental arch linking teeth together?
Which type of supragingival fibre runs mesiodistally along the dental arch linking teeth together?
What is the structural characteristic of attached gingiva?
What is the structural characteristic of attached gingiva?
What is the primary characteristic of the sulcular epithelium?
What is the primary characteristic of the sulcular epithelium?
Which layer of the junctional epithelium is the thickest at the apical zone?
Which layer of the junctional epithelium is the thickest at the apical zone?
Which of the following statements about the junctional epithelium is true?
Which of the following statements about the junctional epithelium is true?
What is the main function of gingival crevicular fluid (GCF)?
What is the main function of gingival crevicular fluid (GCF)?
How does the structure of the sulcular epithelium differ from that of keratinized tissue?
How does the structure of the sulcular epithelium differ from that of keratinized tissue?
What characterizes the interface between the sulcular epithelium and the connective tissue in health?
What characterizes the interface between the sulcular epithelium and the connective tissue in health?
What type of epithelium primarily makes up the granular cell layer?
What type of epithelium primarily makes up the granular cell layer?
What is the approximate length of the junctional epithelium?
What is the approximate length of the junctional epithelium?
What structure is responsible for connecting two neighboring epithelial cells?
What structure is responsible for connecting two neighboring epithelial cells?
How does the junctional epithelium attach to the tooth surface?
How does the junctional epithelium attach to the tooth surface?
What is the role of the gingival connective tissue?
What is the role of the gingival connective tissue?
Which type of junction connects epithelial cells to the basal lamina?
Which type of junction connects epithelial cells to the basal lamina?
What occurs when teeth erupt through the body’s epithelial layer?
What occurs when teeth erupt through the body’s epithelial layer?
What is the composition of the internal basal lamina?
What is the composition of the internal basal lamina?
What is the approximate number of hemidesmosomes at the coronal end per micron?
What is the approximate number of hemidesmosomes at the coronal end per micron?
Which primary function does the junctional epithelium serve?
Which primary function does the junctional epithelium serve?
What are the three anatomic areas of the gingival epithelium?
What are the three anatomic areas of the gingival epithelium?
Which of the following best describes the oral epithelium?
Which of the following best describes the oral epithelium?
What type of epithelium is the oral epithelium classified as?
What type of epithelium is the oral epithelium classified as?
What is the primary function of the gingival connective tissue?
What is the primary function of the gingival connective tissue?
Which layer of the oral epithelium is immediately beneath the superficial cell layer?
Which layer of the oral epithelium is immediately beneath the superficial cell layer?
Where does the oral epithelium extend to in the gingiva?
Where does the oral epithelium extend to in the gingiva?
Identify a component of the periodontium that is not classified as part of the gingiva.
Identify a component of the periodontium that is not classified as part of the gingiva.
What is the purpose of desmosomes in the cells of the oral epithelium?
What is the purpose of desmosomes in the cells of the oral epithelium?
Flashcards
Gingival Connective Tissue Function
Gingival Connective Tissue Function
Provides structural support and transport of substances to gingival cells.
Alveologingival Fibers (AG)
Alveologingival Fibers (AG)
Fibers extending from the alveolar crest to the gingival tissue.
Circular Fibers (C)
Circular Fibers (C)
Fibers forming a ring around the tooth crown above the bone.
Dentogingival Fibers (DG)
Dentogingival Fibers (DG)
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Periosteogingival Fibers (PG)
Periosteogingival Fibers (PG)
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Intergingival Fibers (IG)
Intergingival Fibers (IG)
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Intercircular Fibers (IC)
Intercircular Fibers (IC)
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Interpapillary Fibers (IP)
Interpapillary Fibers (IP)
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Transgingival Fibers (TG)
Transgingival Fibers (TG)
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Transeptal Fibers (TS)
Transeptal Fibers (TS)
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Gingival Sulcus Depth
Gingival Sulcus Depth
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Gingival Sulcus Shape
Gingival Sulcus Shape
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Oral Epithelium Composition
Oral Epithelium Composition
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Oral Epithelium Layers
Oral Epithelium Layers
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Rete Pegs
Rete Pegs
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Sulcular Epithelium
Sulcular Epithelium
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Gingival Crevicular Fluid (GCF)
Gingival Crevicular Fluid (GCF)
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Junctional Epithelium (JE) Function
Junctional Epithelium (JE) Function
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Junctional Epithelium Length
Junctional Epithelium Length
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Desmosomes Function
Desmosomes Function
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Hemidesmosomes Function
Hemidesmosomes Function
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Study Notes
Functions of Gingival Connective Tissue
- Provides integrity and strength to gingival tissues through its dense network of fibers
- Facilitates normal function of connective tissues by transporting water, nutrients, metabolites, and oxygen to and from individual connective tissue cells within its matrix.
- Plays a crucial role in host response and immune response
Supragingival Fibres of CT
- Alveologingival Fibers (AG): Extend from the alveolar crest to the gingival connective tissue.
- Circular Fibers (C): Form a ring around the tooth coronally above the crestal bone
- Dentogingival Fibers (DG): Fan out from the cementum into the gingival connective tissue.
- Periosteogingival Fibers (PG): Extend from the periosteum into the gingival connective tissue.
- Intergingival Fibers (IG): Run mesiodistally along the entire dental arch, connecting teeth together.
- Intercircular Fibers (IC): Encircle several teeth, linking them together.
- Interpapillary Fibers (IP): Located in the papilla, connecting the oral and vestibular papillae.
- Transgingival Fibers (TG): Extend from the cementum to the cementoenamel junction (CEJ) and run horizontally, linking teeth together.
- Transeptal Fibers (TS): Extend from the cementum of one tooth to the cementum of another tooth over the crestal bone.
Gingival Sulcus
- The depth of the gingival sulcus in health is 0.5-2 mm.
- The shape of the gingival sulcus is crescent shaped.
Oral epithelium
- The oral epithelium is the only part of the periodontium that is visible to the unaided eye.
- It is composed of stratified squamous epithelium.
- It covers the outer surface of the free and attached gingiva, extending from the crest of the gingival margin to the mucogingival junction.
- It has four layers:
- Basal cell layer: Cube-shaped cells responsible for cell division and renewal.
- Prickle cell layer: Spine-like cells with large intercellular spaces, connected by desmosomes.
- Granular cell layer: Flattened cells with increased intracellular keratin.
- Keratinized cell layer (stratum corneum): Flattened cells with extensive intracellular keratin.
- The oral epithelium joins the underlying connective tissue in a wavy pattern, known as rete pegs.
Sulcular Epithelium
- It faces the tooth surface without being in contact with it.
- It is thin, nonkeratinized, and without rete pegs.
- It is semi-permeable, allowing fluid to flow from the gingival connective tissue into the sulcus.
- This fluid is known as gingival crevicular fluid (GCF).
- In health, the sulcular epithelium joins the connective tissue at a smooth interface with no epithelial ridges.
Junctional Epithelium (JE)
- It is a stratified squamous non-keratinized epithelium attaching the gingiva to the tooth surface.
- It has a length of 0.71-1.35mm, with 15-30 cells thick coronally and 4-5 cells thick apically.
- It has a high cell turnover rate due to its non-keratinized nature.
- Its attachment to the tooth surface is through hemidesmosomes and internal basal lamina.
- The attachment to the connective tissue is also through hemidesmosomes.
Why is the JE important and where does it come from?
- Teeth penetrate the continuous sheet of epithelium that covers the body, creating an opening.
- The body attempts to seal this opening by attaching epithelium to the tooth, forming the JE, hence the name "junction" meaning "connection."
Function of JE
- Attachment: It secures the gingiva to the tooth.
- Barrier: It prevents the passage of bacteria and other substances from the oral cavity into the underlying tissues.
- Host defense: It plays a role in the immune response to bacteria and other pathogens.
Cell Junctions
- Desmosomes: Connect two neighboring epithelial cells and their cytoskeletons together.
- Hemidesmosomes: Connect epithelial cells to the basal lamina.
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Description
This quiz explores the functions and characteristics of gingival connective tissue, including its integral role in maintaining the integrity, strength, and immune response of gingival tissues. Additionally, it examines the various supragingival fibers that provide structure and support to the oral cavity.
