Anyone who tells you that you shouldn’t wear retainers is tricking you because teeth will always want to move to a certain point. So yes, with braces and with Invisalign retainers are a must if you want to preserve the results that you achieve. I say it’s similar to dieting, if you go on a diet and you lose weight, you can’t go back to the same old lifestyle.
You have to maintain your healthy eating habits in order to keep the weight off. So, it’s the same with Invisalign. You gotta wear retainers. Or, with braces you gotta wear retainers to make sure you keep the teeth from moving back.