calculus

Question 1

4 forms of calcium phosphate

Answer 1

Brushite (B)
octa calcium phosphate (OCP)
hydroxyapatite (HA)
Whitlockite (W)

Question 2

B is basis for _____; seen in:

Answer 2

supragingival calculus formation

recent (<2 week old) calculus

Question 3

OCP predominant in _____ layers; forms ____ crystals

Answer 3

exterior; platelet-like

Question 4

HA predominant in ____ ; forms _____ crystals

Answer 4

inner layers of old calculus; sandgrain or rod-like crystals

Question 5

W is most common form in _____; forms _____ crystals

Answer 5

subgingival calculus; hexagonal (cuboidal, rhomboidal) crystals