Rubber elastics add force to the braces to help move the teeth. For example in the case of an overjet where the upper teeth are too far forward and the lower teeth are too far back, rubber bands may be stretched from the upper front teeth to the lower back teeth.

Elastics are worn usually at all times except when eating or brushing, unless otherwise recommended by the doctor. Patients quickly get the knack for removing and inserting elastics. They are replaced at least once each day or they will lose their snap, so make sure you always have a good supply of bands!

Patient cooperation is critical! It requires commitment, even if elastics are not comfortable. If you "take a break" from them, even for just one day, your teeth will set up resistance that will slow or even stop your progress - your teeth could even shift back to their original position. Discomfort in your mouth will also increase.