The best way to remove loose interproximal cement on a newly cemented crown is by
using a scaler.
using a piece of floss with a knot tied in the middle.
using an ultrasonic handpiece.
using the air/water syringe.
using a piece of floss with a knot tied in the middle.
Rationale: a piece of floss with a knot tied in the middle. This is very effective in removing a loose piece of interproximal cement after cementation of a crown. The other choices would be better for a piece of cement that has not been dislodged.
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An S value of 200 represents a/an
a. exposure to the IP of 1 mR. b. window level of brightness. c. suboptimum exposure to the receptor. d. S:N ratio.