Flashcards in Dental Calculus Deck (23):
_______ is mineralized plaque that forms on the surfaces of natural teeth and dental prostheses.
What are the two types of dental calculus?
How do supra- and sub- gingival calculus differ based on their color?
Subgingival: Dark colored
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
________ calculus has a clay-like consistency; whereas, ______ calculus is hard and dense.
Which type of calculus is commonly found adjacent to the opening to salivary ducts?
True or False: Supragingival plaque is easily detached from the tooth surface.
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
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
If thick enough, how does dental calculus present itself on a dental radiograph?
calculus "spurs" can be seen in the interproximal spaces
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
Dental calculus represents a _______ product of infection, not a cause of periodontitis.
Clinically, subgingival calculus is most frequently diagnosed using which method?
How does calculus attach (two ways)?
1. Underlying pellicle calcifies and attaches to tooth
2. Penetration of surface irregularities
Where does mineralization of calculus begin?
bacterial colonies or ECM
What are the four forms of calcium phosphate?
1. Brushite (B)
2. Octa calcium phosphate (OCP)
3. Hydroxyapatite (HA)
4. Whitlockite (W)
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?
Which form of calcium phosphate is predominant in exterior layers and forms platelet-like crystals?
OCP (octa calcium phosphate)
Which form of calcium phosphate is predominant in inner layers of OLD calculus and forms rod-like crystals?
Which form of calcium phosphate forms hexagonal crystals and is the most common form in subgingival calculus?
True or False: Caculus is the etiological agent of periodontitis.
FALSE! it is not the etiological agent
Does roughness of calculus initiate gingivitis?
NO! roughness increases the ability for bacteria to attach but does not directly cause gingivitis