Fixed bridges are held by teeth on both sides of the area where a natural tooth or teeth are missing. After adjacent teeth are prepared for crowns, a ‘bridge’ (a replacement tooth or teeth) is affixed to the crowns, restoring appearance and chewing ability. In some instances, the bordering teeth can serve as anchors for a bridge without crowns. Instead, replacement teeth or a bridge is held by adjacent teeth with metal brackets. With the brackets attached to the back of natural teeth, they are typically not visible.