Example(s) of intrinsic stains are ____________.
a. nonvital tooth stains
b. tetracycline stains
c. dental fluorosis
d. all of the above
Question 2
Some contradictions or modifications for a coronal polish are:
1 . if the patient is hard to control
2 . the presence of orthodontic appliances
3 . minor oral irritations
4 . hypersensitive teeth
a. 1, 2, 3, 4
b. 1 only
c. 2, 3, 4
d. 1, 3, 4