Dental Calculus Flashcards Preview

AU 15- Periodontology > Dental Calculus > Flashcards

Flashcards in Dental Calculus Deck (23):
1

_______ is mineralized plaque that forms on the surfaces of natural teeth and dental prostheses.

Dental Calculus

2

What are the two types of dental calculus?

Supragingival
Subgingival

3

How do supra- and sub- gingival calculus differ based on their color?

Supragingival: white/whitish-yellow
Subgingival: Dark colored

4

In what case could supragingival calculus present itself as dark-colored?

If it were previously subgingival and then tissue recession caused it to become supragingival

5

________ calculus has a clay-like consistency; whereas, ______ calculus is hard and dense.

Supragingival
Subgingival

6

Which type of calculus is commonly found adjacent to the opening to salivary ducts?

supragingival

7

True or False: Supragingival plaque is easily detached from the tooth surface.

true

8

Does subgingival calculus extend to the base of pockets and contact the JE?

No, it extends to the base of the pocket but does not reach the JE

9

What are four methods used to detect dental calculus?

1. Tactile exploration (11/12 explorer)
2. Dental Radiographs- sometimes
3. Blast of Air to open margins
4. Color of the overlying gingiva

10

If thick enough, how does dental calculus present itself on a dental radiograph?

calculus "spurs" can be seen in the interproximal spaces

11

How can calculus be detected with air-drying?

Pointing the air into the open margin will cause gingiva to pull away from the tooth surface and expose calculus

12

Dental calculus represents a _______ product of infection, not a cause of periodontitis.

secondary

13

Clinically, subgingival calculus is most frequently diagnosed using which method?

Tactile exploration

14

How does calculus attach (two ways)?

1. Underlying pellicle calcifies and attaches to tooth
2. Penetration of surface irregularities

15

Where does mineralization of calculus begin?

bacterial colonies or ECM

16

What are the four forms of calcium phosphate?

1. Brushite (B)
2. Octa calcium phosphate (OCP)
3. Hydroxyapatite (HA)
4. Whitlockite (W)

17

Which form of calcium phosphate is found in calculus that is less than two weeks old (NEW) and is the basis for supragingival calculus formation?

Brushite

18

Which form of calcium phosphate is predominant in exterior layers and forms platelet-like crystals?

OCP (octa calcium phosphate)

19

Which form of calcium phosphate is predominant in inner layers of OLD calculus and forms rod-like crystals?

Hydroxyapatite

20

Which form of calcium phosphate forms hexagonal crystals and is the most common form in subgingival calculus?

Whitlockite

21

True or False: Caculus is the etiological agent of periodontitis.

FALSE! it is not the etiological agent

22

Does roughness of calculus initiate gingivitis?

NO! roughness increases the ability for bacteria to attach but does not directly cause gingivitis

23

Why is calculus removed?

because of its plaque retentive nature and because it keeps plaque in close proximity to tissues (holding active species near tissue causes inflammation)