CALCULUS
Calculus induce further periodontal lesion due to:
o More plaque adhere to it
a) SUPRA GINGIVAL CALCULUS:-
a. Mineralized by saliva
b. Easy to detach
c. Calculus differ in their composition
d. Yellow in colour,
e. Usually seen near major salivary glands
b) SUB GINGIVAL CALCULUS
a. Mineralized by GCF
b. Composition is hydroxy apetite crystals