Discoloration and accelerated wear is seen in composite restoration, if a patient is using a toothpaste having:: (A) Stannous flouride, (B) Calcium carbonate, (C) Chloroform, (D) Both 2 and 3
Answer is D. Calcium carbonate is a surface abrasive and causes wear.
Chloroform causes softening of the composite matrix and causes discoloration.