The time zones known as Greenwich Mean Time and the International Date Line are sometimes alternatively used to demark the western from eastern hemispheres, but the would not be true hemispheres as those time zones are not straight longitudes.
The final part of braces are interarch rubber bands, which are used to adjust bite and jaw position. These are connected to the brackets with hooks, often connecting the top tooth bracket with the bottom tooth bracket to help adjust the position of the teeth in the mouth and the position of the jaw.
Rubber Bands for Braces. Rubber bands, or elastics, are generally used to help improve how teeth fit together. They are also often used to help close spaces, or make sure spaces are closing in the right direction, and improve cross-bites and midlines. They are simply small rubber bands that are attached to the braces. They are attached by the patient to little hooks that are a part of the braces.