Unfortunately I couldn't tell how effective these are because they were such a huge pain to use. The molds are packed with the peroxide solution. I put them around my teeth and pressed them in to ensure contact, and the solution pressed out of the mold and into my mouth. There is so much whitening solution in the molds I don't see how it's possible to use these without getting the stuff all in your mouth. I spit out half of it. I kept the molds in for about 15 minutes before having to take them out. I've used whiteners before and none of them hurt as bad as this while I was using it. The peroxide stuck to the roof of my mouth and was stinging like crazy. After about 5 minutes the sides of the molds on the back of my teeth flipped up and would not stay down. I was constantly adjusting it with my fingers. When I removed the molds I had the peroxide gel all over my teeth, almost as if someone had rubbed Vaseline all over your mouth. The stuff was everywhere and I had to scrape it off with my fingers and then brush my teeth thoroughly to get it all out.
As I said, I cannot comment on how well TresWhite actually works, but it was a huge pain to use. It is also only a 9% hydrogen peroxide solution. Crest Whitestrips are 10%, and they are sold over the counter and half as expensive. If you are looking for a professional whitening system that is better than anything from the drugstore and is cheaper than professional bleaching, I would recommend asking your dentist about Crest Whitestrips Supreme, which are currently only available from your dentist and contain a 14% solution of hydrogen peroxide.
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