Term
| What are the 4 tissues of the periodontium? |
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Definition
1.Gingiva
2.Cememtum
3.Alveolar bone
4.periodontal ligament |
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Term
| What are gingival tissues compromised of? |
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Definition
| keratinized epithelium and connective tissue |
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Term
| What do the gingival tissue surround? |
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Definition
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Term
| What are the different types of gingiva?(3) |
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Definition
1.marginal(free/unattached)
2.attached
3.interdental |
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Term
| What is the gingival tissue continuous with? |
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Definition
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Term
| Where is marginal gingiva? |
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Definition
| terminal border of gingiva surrounding teeth like a collar |
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Term
| What is marginal gingiva continuous with? |
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Definition
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Term
| What separates the marginal gingiva and attached gingiva? |
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Definition
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Term
| How big is the marginal gingiva? What does it correspond with? |
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Definition
| corresponds with sulcus, 0.5-3 mm |
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Term
| Does free gingiva have stippling? |
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Definition
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Term
| What is attached gingiva bound to? |
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Definition
| tightly bound to the underlying bone |
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Term
| What does attached gingiva look like? (4) |
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Definition
1.immobile
2.dull pink, could be pigmented
3.firm, resilient
4.stippled |
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Term
| Where do you measure the width of the attached gingiva? |
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Definition
| between the free gingiva and the alveolar mucosa |
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Term
| Is the width of the attached gingiva the same all over the mouth? |
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Definition
| no, the width varies by location |
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Term
| Where is the width of the attached gingival greatest? |
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Definition
in the incisor region...
3.5-4.5 in maxilla
3.3-3.9 in mand |
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Term
| Where is the width of attached gingiva the least? |
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Definition
in the premolar region...
1.9 in max
1.8 in mand |
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Term
| Does the muccogingival junction move throughout life? |
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Definition
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Term
| What do changes in attached gingiva width result from? |
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Definition
| changes in coronal margin if marginal gingiva |
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Term
| How do you calculate the mucogingival junction? |
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Definition
| by subtracting pocket reading from FGM to MGJ |
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Term
| Where is interdental papilla located? |
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Definition
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Term
| What is another name for interdental gingiva? |
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Definition
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Term
| How many peaks does interdental gingiva consist of? |
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Definition
| two, one facial and one lingial with contact area between |
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Term
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Definition
| a concave form between 2 peaks |
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Term
| A col varies in depth and width depending on? |
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Definition
| the expanse of the contact area |
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Term
| Which teeth have the broadest col? Least? |
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Definition
| col broadest in molars, then premolars, then incisors |
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Term
| What is dentogingival tissues? |
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Definition
| gingiva that attaches to the tooth surface |
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Term
| What are the two types of dentogingival tissue? |
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Definition
1.sucular epithelium
2.juntional epithelium |
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Term
| What type of epithelium is sucular? |
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Definition
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Term
| Is sucular epithelium non keratinized? |
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Definition
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Term
| What is the sucular epithelium interface like? |
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Definition
| relatively smooth interface with lamina propria |
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Term
| What are the epithelial cells like in sucular epithelium? |
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Definition
| tightly packed epithelial cells with many desmosomal junctions |
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Term
| What does sucular epithelium act as? |
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Definition
| a semi-permeable membrane |
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Term
| What is a bad thing about sucular epithelium? |
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Definition
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Term
| What does crevicular fluid do? |
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Definition
| bathes the sulcus at a rate of 1-2 microliters per tooth per hour |
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Term
| Where does crevicular fluid go? |
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Definition
| seeps between the epithelial cells |
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Term
| What does crevicular fluid contain? (6) |
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Definition
1.WBC
2.IgG
3.IgM immunoglobins
4.minerals
5.growth factors |
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Term
| What does junctional epilthelium line? |
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Definition
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Term
| What is junctional epilthelium attached to the tooth by? |
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Definition
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Term
| What can junctional epithelium attach to? |
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Definition
1.enamel
2.cemetum
3.dentin |
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Term
| What makes junctional epithelium more permeable than other tissue? |
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Definition
| cells are loosly packed, fewer desmosomal junctions |
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Term
| What is the interface with CT like? |
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Definition
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Term
| What are the number of cells in the JE? |
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Definition
| ranges from 14-30 cells at the floor of the sulcus and 3-4 cells at its apical portion |
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Term
| What happens to the basal layer in juntional epithelium? |
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Definition
| undergos constant and rapid mitosis |
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Term
| What happens to the cells in junctional epithelium? |
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Definition
| cells migrate coronal but do NOT mature |
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Term
| Where are junctional epithelium cells shed? |
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Definition
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Term
| What are the ranges in length for JE? |
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Definition
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Term
| Apical border of JW maintains how much of a distance form the alveolar crest? |
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Definition
| 1-2 mm distance from the alveolar crest |
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Term
| What does the biological width= |
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Definition
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|
Term
| What is epithelial attachment? |
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Definition
| the biological mechanism that joins the JE to the tooth |
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Term
| WHat is this accomplished by? |
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Definition
| 2 basal lamina(external and internal) |
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Term
| What does the external basal lamina attach? |
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Definition
| JE cells to the CT by hemidesmosomes |
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Term
| What does the internal basal lamina attach? |
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Definition
| JE to the tooth by hemidesmosomes |
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Term
| What does the cementum attach? How? |
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Definition
| attaches the tooth to the bone by anchoring PDL |
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Term
| Is cementum vascular? Does it have nerves? |
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Definition
| no, it is avascular and has no nerves |
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Term
| How does cementum receive nourishment? |
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Definition
| by way of cells in the PDL |
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Term
| Can you make more cementum throughout life? |
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Definition
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Term
| How much percent mineralized, organic, and water is cementum? |
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Definition
1.65% mineralized(hydroxyapatite)
2.23% organic
3.12% water |
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Term
| What comes in contact with dentin when Hertwig's root sheath disintegrates? |
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Definition
| undifferentiated cells from the dental sac |
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Term
| What are these cells stimulated to become? |
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Definition
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Term
| What do cementoblasts lay down? |
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Definition
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Term
|
Definition
| cementoblasts that become trapped in cementoid |
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Term
| WHat does cememtoid calcify into? |
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Definition
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Term
| What are the two types of cememtum? |
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Definition
1.acellular(primary)
2.cellular |
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Term
| WHich type of cememtum is the first deposited? |
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Definition
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Term
| At what rate does acellular cementum form? |
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Definition
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Term
| Are cementocytes found in acellular cememtum? |
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Definition
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Term
| How does acellular/primary cememtum cover? |
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Definition
| one layer covers the root, thickest in the coronal area |
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Term
| What does cellular cememtum form after? |
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Definition
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Term
| What is another name for cellular cementum? |
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Definition
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Term
| What rate does cellular cementum form at? |
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Definition
| at a faster rate than acellular |
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Term
| Do cememtocytes become inbedded in acellular or cellular? |
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Definition
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|
Term
| Where is cellular cementum thickest? |
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Definition
| in apical and interradicular areas |
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|
Term
| What does acellular cementum look like? |
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Definition
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|
Term
| What are cememntoblasts that get caught in cementoid in cellular cementum called? |
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Definition
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|
Term
| Where do cementocytes lie? |
|
Definition
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|
Term
|
Definition
| canaliculi that radiate towards PDL where they get nutrients |
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|
Term
| Where does cementum get nourishment from? |
|
Definition
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|
Term
| What are sharpey's fibers? |
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Definition
| collagen fibers from the PDL that insert into both the cementum and bone |
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|
Term
| How do sharpey's fibers insert? |
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Definition
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|
Term
| What happens to cementum in trauma? |
|
Definition
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|
Term
| What are involved in that reobsorption? |
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Definition
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Term
| What are some causes of cementum reobsorption? (6) |
|
Definition
1.trauma from occlusion
2.rapid ortho movement
3.pressure from cysts
4.tumors
5.malaligned erupting teeth
6.periapical or periodontal disease |
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Term
| What does repair of cementum result from? |
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Definition
| cementoblasts in PDL laying down secondary cementum(cellular) |
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