How Long Do Teeth WHitening gel and Trays Last?

Almost 2 years ago, I took advantage of a free teeth whitening promo offered by a new dentist. I had new patient cleaning and exam. They took impressions of my teeth, made custom trays for me, and gave me whitening gel. I haven’t returned to that dentist because the office environment was unprofessional. It’s a family dentist but I don’t feel comfortable taking my daughter there. Are the trays and gel good for life? I didn’t use it right away. I actually put the supplies in the cabinet below my bathroom sick and forgot about it. Is it still safe to use? And will it work? D.L.

D.L.,

The trays you received with your free teeth whitening kit should be good for life if you have kept them in their protective case and have not experienced any of the following issues:

  • The alignment of your teeth has changed
  • You’ve recently received a considerable amount of dental work
  • The bleaching trays are damaged

You can rinse the bleaching trays, place them on your teeth, and check them for fit.

Is It Save to Use the Free Teeth Whitening Gel?

Photo of upper and lower teeth whitening trays in a blue case; for information on teeth alignment from the office Plano dentist Dr. Miranda Lacy.
Custom teeth whitening trays can last for many years

Most whitening gel lasts about a year after it is made. If it is kept in the refrigerator, the gel can still be good for use a little longer than a year. Over time the gel oxidizes and loses its potency. The gel will begin to look white or foggy if it is old. It doesn’t necessarily mean that it is dangerous to use, but it probably won’t whiten your teeth.

Dentists offer quality teeth whitening, so the tubes you received probably have the manufacturer’s name on them as well as the gel type. You can search online for the guidelines for using the gel. If you can’t find any information, it’s probably best to throw away the gel.

Custom bleaching trays cost more than gel. If you are keeping up with your dental appointments for cleanings and exams, tell your current dentist that you already have custom trays. He or she might be willing to offer you the gel at no cost or for a reasonable fee.

 This post is sponsored by Dr. Miranda Lacy. Dr. Lacy of Plano, TX offers free teeth whitening to patients who maintain regular dental exams and cleanings.