Successful orthodontic treatment primarily depends on two things: constant pressure and time. Sometimes it takes added force to move teeth and jaws into their correct positions. Elastics, also called rubber bands, have the pull to make that happen. But they won’t work without you. To achieve the healthy, beautiful smile you’re working for, you must carefully follow your orthodontist’s instructions about placing and using your rubber bands. At first, the elastics may cause your teeth to be tender. That’s because your teeth are moving, which is the goal. Usually the tenderness lasts only a day or two. Not wearing your rubber bands as instructed will only make the tenderness last longer, and make the tooth movement take more time. So when you get your elastics please remember to follow your instructions given by your orthodontist.