Maybe you were born with effortlessly straight teeth. Maybe you got your teeth straightened with braces or Invisalign when you were younger. In either case, it can be alarming to notice that your teeth have started to drift out of their proper positions. Understanding some of the possible causes of teeth shifting can give you an idea of what to expect as well as a plan for what to do about it. Keep reading to learn five common reasons why teeth might shift and how your dentist can help!