When I was a teenager, I had and I wore a removable retainer on my top teeth for three years (I was 19 years old then). I am now 41 years old. I had a few but they have been filled. I go to the dental office twice a year for my receding gums. Over the past few months, I noticed that my two top front teeth have been shifting and slightly overlapping. Why did this happen? What can I do to stop and correct this?
Thank you for your professional help!