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29 Cards in this Set
- Front
- Back
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Epithelial tissue
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makes up outer space and lines body cavities.
Ex: Enamel |
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Connective Tissue
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Fills space between tissues and organs of body
Ex: cementum, dentin, and pulp |
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Difference between epithelial tissue and Connective tissue
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Epith. tissue: outer surface of body, lines body cavities. Many cells, sparce ECM.
CT: More matrix, fewer cells. |
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Def. Desmosomes
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Cell to cell connection
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Def. Hemidesmosomes
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cell to basal cell or lamina connection
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Keritanization
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Provides strength. Process in which epi. cells on the surface of skin become stronger and waterproof.
(ex: marginal gingiva and hard palate) -No nuclei |
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Epithelial Tissue Characteristics
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-No blood supply
-Receives nourishments from blood. |
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Dentinogingival units
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JE + the gingival fibers
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Components of the PDL
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-Cells: fibroblasts( makes collagen), cementoblasts, osteoblasts.
-Extracellular matric -Blood supply |
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Alveolar crestal fibers
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extends downward from cementum to alveolar crest
-resists horizontal movement |
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Horizontal fibers
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Runs horizontally from cementum to bone
-resists horizontal pressure |
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Oblique fibers
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Runs in a diagonal direction
-Resists vertical pressure |
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Apical Fibers
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Extends from tooth apex to bone
-Reissts forces that might lilt the tooth out of its socket |
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Interradicular fibers
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occurs only in multi rooted teeth in the furcation area
-stabalizes the tooth in its socket |
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Ends of the PDL fibers that are embedded in the cementum and the alveolar bone are termed?
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Sharpeys fibers
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Cementum Characteristics and functions
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-65% mineralized
-Seals and covers dentinal tubules acts to protects underlying dentin -no blood vess. or nerves |
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Two types of cementum
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1. acellular
-No cementocytes, covers cervical 1/3 to 1/2 of root 2. Cellular -Has cementocytes, gets deposited through life of tooth |
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CEJ 1-3 relationship with enamel
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overlap-60%
meet-3-% gap-10% remember "O.M.G" |
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Gingival Epi. characteristics
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-stratisfied squamous epi.
-microscopically similar to skin |
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Oral epithelium
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covers free and attached gingiva
-extends from crest of gingival margin to the mucogingival junction -Can be keratinized or parakeritanized. |
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Sulcular epithelium
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lines sulcus
-thin non-keritanized epi, making it less resistant to stresses -allows permeability ( allows fluid to flow from gingival connective tissue in sulcus (GCF) |
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Junctional Epithelium
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located at the base of the sulcus
-Length: 0.71-1.35mm (thicker at coronal area) 15-30 cells thick at the coronal zone 4-5 cells thick at the apical zone. -No Keritanized epi |
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Gingival Crev. fluid
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GCF increases when in function (eating) and poor OHI
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Supragingival fibers
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-A network of rope like collagen fiber bundles in the gingival conn. tissue
-brace free gingiva firmly against tooth -provide rigidity -unite free gingiva w/cementum of the root and bone -connect adjacent teeth to each other. |
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Gingival fiber groups
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C-Circular
AG-alveolargingival DG-dentinogingival PG-periostogingival IG:intergingival IC-intercircular IP-interpapillary |
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Define Periodontal Disease and name the 2 types.
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Def: Bacterial infection of the periodontium
Types: gingivitis and periodontitis (-itis means inflammation) |
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Def. Gingivitis
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Disease confined to the gingiva
-reversible destruction to tissue of periodontium GINGIVITIS DOES NOT ALWAYS LEAD TO PERIODONTITIS |
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Def. Periodontitis
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infection of all parts of the periodontium (gingiva, PDL, bone, cementum)
-IRREVERSIBLE -PERIODONTITIS ALWAYS PRESEATED AFTER GINGIVITIS |
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Characteristics of healthy periodontium
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healthy sulcus: JE coronal to CEJ
alveolar intact |
