Multiple choice Which of the following is not the function of saliva? Acts as solvent in dissolving food particles Digests starch Aids in water balance in the body Cleans the mouth Covers and fixes the root in position Reveal answer Fill a bubble to check yourself E Correct answer Explanation It is the function of cement, a bone like structure covering and fixing the root in position. The function of the cement is not only to seal the restoration on the tooth, but also in some cases to support the retention of the restoration.