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.
But why do you need braces spacers and why spacers hurt so much? The answers are right here. Once you decide on getting braces, the first thing your dentist do is place spacers back in your teeth. Braces spacers are placed mainly to create enough room for the anchors used to join the braces. The role of anchor is to slide over your back teeth smoothly and get attached to braces for extra support.