periodontal macro/micro structures Flashcards
What are the periodontium components?
Gingiva
Periodontal Ligament
Cementum
Alveolar bone
What are the microstructures of the gingiva?
Gingival epithelium
Basement membrane
Gingival connective tissue
Supracrestal tissue attachment (formerly known as biologic width)
What are the macrostructures of the gingiva?
Free gingiva
Attached gingiva
Interdental gingiva
What is Free Gingiva?
The coronal demarcation of attached gingiva (AG), corresponding to the CEJ if healthy.
How commonly is Free Gingiva present in normal gingiva? (Ainamo and Loe, 1966)
1/3 of normal gingiva
What does the mucogingival junction (MGJ) represent?
The junction between keratinized gingiva and non-keratinized mucosa.
How can the mucogingival junction be determined?
1) visualization;
2) roll technique;
3) Schiller iodine solution.
What are the types of gingival epithelium?
Junctional, sulcular, and oral epithelium.
What are the layers (strata) of the oral epithelium?
Stratum corneum
stratum granulosum
stratum spinosum
stratum basale
What percentage of oral epithelium cells are keratinocytes?
90%
What is gingival epithelium?
Stratified squamous epithelium attached to the underlying connective tissue
Which layer of the oral epithelium is keratinized?
The stratum corneum.
What percentage of oral epithelium cells are non-keratinocytes?
10%
Oral epithelium is in which epithelium layers?
Stratum basale, spinosum, granulosum and corneum
What are inflammatory cells in oral epithelium?
They are the inflammatory response of oral mucosa, their location varies
Are rate pegs present or absent in Sulcular and Junctional epithelium?
Absent
Oral epithelium is what epithelium type?
Keratinized Stratified Squamous
Sulcular and Junctional epithelium are what epithelium type?
Non-keratinized Stratified Squamous
What offers defense against bacterial invasion and periodontal disease destruction?
Oral Epithelium
Sulcular and Junctional epithelium are in what epithelium layers?
Stratum basale and suprabasale
How is keratinized gingiva measured?
attached gingiva + probing depth
Are rate pegs present or absent in Oral epithelium?
Present
What is the ranking of the Intracellular Space for Sulcular, Junctional, and Oral epithelium from widest to narrowest?
- Junctional (widest)
- Suclular
- Oral (narrowest)
What is the ranking of the Permeability for Sulcular, Junctional, and Oral epithelium from greatest to least?
- Junctional (greatest)
- Suclular
- Oral (least)