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Can I use my free teeth whitening trays as a retainer?

Hi. Just wondering if I can use my free teeth whitening trays as a retainer. I got the trays from my former dentist and I still use them to whiten my teeth. They are in almost new condition. I completed Invisalign treatment 5 months ago and I have misplaced my retainer. The last place I had it was at home and I haven’t traveled recently, so it has to be here. I’m not ready to replace my retainer because I had some unexpected expenses this month. I know I need to wear something on my teeth at least overnight and I am wondering if the whitening trays are okay to wear temporarily or is it better to just go without the whitening trays? Gina.

Gina,

Your free teeth-whitening trays should not be used as a retainer. There are several reasons why.

Why Teeth-Whitening Trays Shouldn’t Be Used as a Retainer

  • The material is different – Teeth whitening trays are flexible and comfortable to wear. The material is softer than a retainer, because bleaching trays are not designed to keep your teeth aligned. Metal or hard plastic makes retainers rigid so they will hold their shape and keep your smile aligned.
  • It’s too early after treatment – If it’s only been several months since you’ve completed orthodontic treatment, your teeth are still quite subject to movement. If you had been wearing a retainer for a year or more, they would be less likely to shift so quickly. At this point, you want to ensure that your teeth aren’t moving, and free teeth-whitening trays aren’t the answer.
  • Age is a factor – Although you didn’t mention your age, from the teen years into your early 20s, jawbone growth can cause your teeth to shift. It’s critical to wear a custom-made retainer to keep your teeth aligned.
  • Your free teeth-whitening trays really don’t fit – You received your free teeth-whitening trays before you completed orthodontic treatment. They really don’t fit the new position of your teeth. You shouldn’t use them. When you can afford it, ask your dentist for new custom trays. Some dentists provide free or discounted whitening trays as long as you keep your regularly scheduled appointments for cleaning and exams.
  • Consider the risks – Without a retainer, there is always the risk of your teeth shifting, so you shouldn’t go without it at all. If your teeth shift, you will have to resume orthodontic treatment for a short period. This can cost you more time and money than getting a new retainer.

We recommend that you contact your dentist and ask for the cost of a new retainer. If the cost is really out of your budget, ask if your dentist is willing to provide you with a payment plan to make it more affordable. Your free teeth-whitening trays will do more harm than good. There is no substitute for your retainer.

This post is sponsored by Plano, TX dentist Dr. Miranda Lacy.