Calculus formation Flashcards
1
Q
Is calculus formation a PRIMARY or SECONDARY local factor for perio disease?
A
Secondary
2
Q
What is calculus?
A
It is mineralised/calcified plaque
3
Q
What is calculus made out of?
A
Calcium phosphate crystals (from the saliva)
4
Q
Approximately how long does it take for calculus to form?
A
2-14 days
5
Q
Does calculus count as a cause of periodontitis?
A
No. It is not causative. It increase the risk of periodontitis as it acts as a plaque-trap
6
Q
Outline the formation of calculus
A
- Plaque needs to form first
- Plaque mineralises
The colonisation of bacteria provides matrix for calcification and precipitation of mineral salts from saliva (calcium and phosphate) - High pH promotes mineralisation
