Do I have to wear the leather bands for my braces even when I go to bed at night? Are they meant to be replaced with new ones before going to bed at night?

Braces need to be worn at night while you sleep, unless they are self removable. These bands mainly serve to pull and reposition the teeth and need to be worn for a sufficient amount of time each day to achieve the desired effect.

Whether or not you need to get new bands before you go to bed at night depends largely on your dentist's recommendation and how well the bands have been used. Generally speaking, if the leather bands are not damaged or have lost their elasticity, then there is no need to get new ones at night. If the band has lost its elasticity or the traction on the teeth has weakened, then it is best to get a new band at night before going to bed.

In any case, it is best to follow your dentist's recommendations to ensure that the leather bands are used correctly for optimal orthodontic results. It is also important to pay attention to oral hygiene and keep the leather bands and surrounding teeth clean.