Infection is an abnormal sequence of events after surgery. Decreasing the amount of bacteria in the surgery site helps control infections. This is accomplished by absolute cleanliness throughout the oral cavity.
You should brush your teeth as you always do, and use frequent rinses of either salt water (1/4 teaspoon salt in a glass of water) or the mouthwash of your choice.
Symptoms of infections develop on the third to fourth day after surgery.
You have also been given a prescription for an antibiotic to prevent the development of an infection which you should take according to the instructions.
If you are still concerned about the possibility of infection, contact your doctor.