5 - Plaque and Microbiology Flashcards
Can AA be transferred within the mouth?
CHRISTERSSON
LAP patients, AA transferred to different sites by periodontal probe but generally did not remain beyond 3 weeks in healthy sites
Can AA/PG be transmitted horizontally? Vertically?
VAN WINKELHOFF
Horizontal transmission between 200-75% of spouses
Vertical transmission 30%
What AA serotype is most prevalent?
YANG
Serotype B most common in GAP, ChP similar A/B/C
B most common overall (38%)
Is AA found in ChP?
EBERSOLE
At sites with greater PD/BOP/CAL. More antibodies at these sites
1M and incisors
What may differentiate good responders from poor responders?
COLOMBO
CAL gain or loss and sites w/ 3mm CAL
Smokers, plaque, periodontal pathogens (PG, TF, Prevotella)
Time points in experimental gingivitis
LOE
10-21 days develop gingivitis
Resolve in 1 week
What affects risk for root caries in ChP patients?
RAVALD
History of root caries
Dietary habits
Lactobacillus, S. mutans
MATTILA - More caries in those w/ ChP. Increase caries w/ more PD >4mm
What is the plaque free zone?
CARNEIRO
Area between attachment and plaque border. Area for leukocytes?
How do genetics play a role in ChP?
MICHALOWICZ
Monozygous and dizygous twins reared-together and apart. ChP = 1 site PD >5mm or AL >3mm
Concordance rates not significant. Differences between subgingival bacteria are due to environment
Nibali - SR, MAX 38% inheritability w/ twins. Family study 15%.
What is the role of viruses in ChP?
ROTOLA
Gingival tissue may be a reservoir for HHV-7
EBV could be involved in etiology
CMV coinfection
What makes up the red complex?
PG
TF
TD
What makes up the orange complex?
F. nucleatum PI P nigrescens Peptostreptococcus micros Campylobacter rectus
What makes up the green complex?
Eikenella corrodens
AA type A
Capnocytophaga
What makes up the yellow complex?
Streptococcus
What makes up the purple complex?
Actinomyces
Veillonella parvula
What is the relationship between red and orange?
RED increase as PD and BOP increased
No RED, shallowest PD
Orange precedes red
How are bacteria distributed on oral surfaces?
MAGER
Saliva/tongue
Remaining soft tissue surfaces
Supra/subgingival plaque different from those 2
How does gingivitis differ in mixed/decidous, and permanent dentition?
RAMBERG
When withholding oral hygiene, deciduous with less plaque, gingivitis, and GCF flow
Hormones in teens?
Describe the bacterial flora of HIV+ ChP patients
MOORE
Same in HIV-/+ with ChP except increased Mycoplasma salivarium in HIV+
How does HIV viral load affect the subgingival microbiome?
PEREIRA
High viral load w/ greater P nigrescens, E. corrodens, and C. gingivalis
NO difference in periodontal parameters
What are the zones in ANUG?
Bacterial
Neutrophil (spirochetes present)
Necrotic (spirochetes w/ necrotic debris)
Spirochete - epithelium/CT at 300uM from non-necrotic surface of ulcer
LISTGARTEN
