Perio Micro and Calculus Flashcards Preview

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Flashcards in Perio Micro and Calculus Deck (14):
1

Red Complexes

P. gingivalis

T. forsythia

T. denticola

2

Co-aggregation

  • Cell to cell recognition of genetically distinct cell types
  • Mediated by protein, glycoprotein and carb receptors
  • cells are suspended
  • clumps form- which then attach to pellicle

3

Co-adhesion

  • Interactions btw suspended and already adhering microbes
  • influenced by temp and lactose

4

Supragingival Calculus

Spans

color

consistency

removal is

commonly found

  • Coronal to gingival margin
  • white/ yellow
  • Clay like consistency
  • Easily detached from tooth
  • Found opposite of salivary ducts

5

Subgingival Calculus

location

Color

consistency

Spans

could become

  • Below gingival margin
  • Dark colored
  • Hard dense
  • Extend to base of pocket, does not reach JE
  • With recession will become supra

6

4 forms of calcium phosphate

  • Brushite
  • Octa Ca phosphate
  • Hydroxyapatite
  • Whitlockite

7

Brushite

  • Basis for supragingival calculus formation
  • Seen in recent calculus (less than 2 weeks old)

8

Octa Ca Phosphate

  • Predominant in exterior layers
  • Forms platelet like crystals
  •  

9

Hydroxyapetite

  • Predominant in inner layers of old calculus
  • Forms rod or sand grain like crystals

10

Whitlockite

  • Most common form in subgingival calculus\Hexagonal crystals

11

Osteoclast activators 7

  • RANK-L from osteoblasts
  • IL-1beta, IL-6, IL-11, IL-17
  • PGE2
  • TNF-Alpha

12

Ratio of RANK-L and OPG in periodontitis

HIGH RANK-L

low OPG

13

Chronic periodontal lesions mainly have

Th2 cells vs Th1

14

Most predominant and active secretory cells in advanced periodontal lesions

Plasma Cells