-
Contributory
- • Do not by themselves initiate inflammation
- • Facilitates long-standing plaque
- accumulation
- • Contributes to difficulty in plaque removal
-
Most important local contributing factor
Calculus
-
latin for pebble or stone
calculus
-
Presence accelerates the progression of
periodontal disease (5)
- Local contributing factor (adjacent to salivary sources)
- Veneer and ledge formations
- Calcium carbonate & inactive microorganisms
- Subgingival—more Ca, Mg, Fl
-
calculus is formed from what in plaque
Calcium and phosphate salts
-
does calculus contribute to the development of caries or disease?
No
-
Has Channels with debris and bacteria
• Shelter for bacteria
Calculus
-
Supragingival Calculus defined:
good for:
Most prevalent where:
Made of:
Stratified?
Predominant crystal:
- Good visual for documentation
- Most prevalent at opening of Wharton’s and Stenson’s ducts
- Organic matrix of plaque micro organisms, glucans, glycoproteins and lipids
- Stratified
- Predominant crystal=hydroxyapatite
-
Color of Subg calc
- black
- dk green
- due to blood pigments
-
how does sub calc grow?
cementume + pellical
-
3 major characteristics of calc
- Porous,
- rough
- Retention device
-
As mineralization continues, what 3 crystals form
- hydroxyapatie
- brushite
- whitlockite
-
% mineralization for supr Calc?
% mineralization for sub calc?
-
% mineralization for supr Calc?
% mineralization for sub calc?
-
Do not reduce present calculus
Do not affect subgingival calc. formation
Do not reduce quantity of calculus present
Do not replace instrumentation
Thorough brushing needed
- Hydroxyapatite Inhibitors
- • Pyrophosphates
-
Plaque retentive factors
- Dental restorations:
- Defective margins
- Overhangs
-
Dental anomalies aiding in plaque accumulation
- Cervical enamel projections (CEPs)
- Enamel Pearls
- Palatogingival grooves
- Furcations
- Internal root concavities
-
Traumatic Factors
- • Toothbrush Trauma
- • Factitious Disease
- • Food Impaction
- • Chemical Injury
- • Occlusal Trauma
-
do oral piercing contribute to plaque formation?
yes
-
Tobacco is a risk factor for
PD and Calc
-
PMNs are increases in
Smokers..increases phagocytosis
-
how many drinks per week will increase risk for PD
3.5
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