calculus Flashcards
1
Q
4 forms of calcium phosphate
A
Brushite (B)
octa calcium phosphate (OCP)
hydroxyapatite (HA)
Whitlockite (W)
2
Q
B is basis for _____; seen in:
A
supragingival calculus formation
recent (<2 week old) calculus
3
Q
OCP predominant in _____ layers; forms ____ crystals
A
exterior; platelet-like
4
Q
HA predominant in ____ ; forms _____ crystals
A
inner layers of old calculus; sandgrain or rod-like crystals
5
Q
W is most common form in _____; forms _____ crystals
A
subgingival calculus; hexagonal (cuboidal, rhomboidal) crystals
